Publications

2015

[189] H. Wu, L. Dong, H. Zheng, X. Liu, X. Yin, W. Ma, L. Zhang, W. Yin, S. Jia and F. K. Tittel, “Enhanced near-infrared QEPAS sensor for sub-ppm level H2S detection by means of a fiber amplified 1582 nm DFB laser”, Sensors and Actuators B: Chemical, accepted June 15, 2015.

[188] L. Spacek, M.L. Mudelel, R. Lewicki,, F.K. Tittel, T.Risby, J. Stoltzful,  J. J. Munier, S. F. Solga; “Breath Ammonia and Ethanol Increase in Response to a High Protein Challenge,Biomarkers, 20, 149-156 , 2015 [PDF]

[187] L. Dong, Y. Yu, C. Li, S. So, F.K. Tittel; “Ppb-level formaldehyde detection using a CW room-temperature interband cascade laser and a miniature dense pattern multipass cell” Optics Express; accepted July 2015 [PDF]

[186] W. Ren, L. Luo, F. K. Tittel, “Sensitive detection of formaldehyde using an interband cascade laser near 3.6 µm”, Elsevier, Sensors and Actuators B: Chemical; accepted July 17, 2015. [PDF]

[185] Y. Ma, G. Yu, J. Zhang, X. Yu, R. Sun and F. K. Tittel, “Quartz Enhanced Photoacoustic Spectroscopy Using Different Quartz Tuning Forks”, Sensors 2015, 15(4), 7596-7604. [PDF]

[184]  K. Liu, L. Dong, and F. K. Tittel, “Compact sound-speed sensor for quartz enhanced photoacoustic spectroscopy based applications”, Rev. Sci. Instrum., 86, 044903, 2015. [PDF]

[183] A. Sampaolo, P. Patimisco, J. M. Kriesel, F.K. Tittel, G. Scamarcio and V. Spagnolo “ Single mode operation with mid-IR hollow fibers in the range 5.1-10.5 µm”, Opt. Exp.,  23, 195-204, 2015 [PDF]

[182]  V. Spagnolo, P. Patimisco, R. Pennetta, A. Sampaolo, G. Scamarcio, M. S. Vitiello, K. Tittel, “THz Quartz-enhanced photoacoustic sensor for H2S trace gas detection”, Opt. Exp. 23, 7574-7582, 2015 [PDF]

2014

[181] Y. Cao, N. Sanchez, W. Jiang, R. J. Griffin, F. Xie, L. C. Hughes, C. Zah, and F. K. Tittel, “Simultaneous atmospheric nitrous oxide, methane and water vapor detection with a single continuous wave quantum cascade laser”  Opt. Exp., 23, 2121-2132, 2015. [PDF]

[180] H. Wu, L. Dong, W. Ren, W. Yin, W. Ma, L. Zhang, S. Jia, F. K. Tittel, “Position effects of acoustic micro-resonator in quartz enhanced photoacoustic spectroscopy”, Sensors and Actuators B: Chemical, 206, 364-370, 2015. [PDF]

[179] Y. Cao, N. P. Sanchez, W. Jiang, W. Ren, R. Lewicki, D. Jiang, R. J. Griffin, and F. K. Tittel, “Multi-pass absorption spectroscopy for hydrogen peroxide detection using a CW DFB-QCL”. Journal of Applied Technologies, 3, 549-558, 2014. [PDF]

[178] P. Stefanski, R. Lewicki, N. P. Sanchez, J. Tarka, R. J. Griffin, M. Razeghi, F. K. Tittel, “Measurements of carbon monoxide mixing ratios in Houston using a compact high power CW DFB-QCL based QEPAS sensor”, Appl. Phys. B, 117, 519-526, 2014. [PDF]

[177] W. Ren, W. Jiang, F.K. Tittel, “Single-QCL-based absorption sensor for simultaneous trace-gas detection of CH4 and N2O”, Applied Physics B, 117, 245-251, 2014 [PDF]

[176] M. Köhring, S. Huang, M. Jahjah, W. Jiang, W. Ren, U. Willer, C. Caneba, L. Yang, D. Nagrath, W. Schade, F.K. Tittel, “QCL based TDLAS sensor for detection of NO towards emission measurements from ovarian cancer cells”, Applied Physics B, 117, 445-451, 2014. [PDF]

[175] F.K. Tittel, R. Lewicki, M. Jahjah, B. Foxworth, Y. Ma, “Mid-Infrared Laser based Gas Sensor Technologies for Environmental Monitoring, Medical Diagnostics, Industrial and Security Applications,” Chapter 21 in Terahertz and Mid Infrared Radiation: Detection of Explosives and CBRN (using Terahertz), NATO Science for Peace and Security Series B: Physics and Biophysics, 153-165, 2014. [PDF]

[174] S. Solga, M. Mudalel, L. Spacek, R. Lewicki, F.K. tittel, C. Loccioni, A. Russo, A. Ragnoni, T. Risby, “Changes in the Concentration of Breath Ammonia in Response to Exercise: A Preliminary Investigation,” J. Breath research, 8 037103, Sept. 2014.

[173] P. Patimisco, G. Scamarcio, F. K. Tittel, V. Spagnolo, “Quartz-enhanced photoacoustic spectroscopy: a review”, Sensors: Special Issue “Gas Sensors-2013”, 14, 6165-6206, 2014. [PDF]

[172] J. P. Waclawek, R. Lewicki, H. Moser, M. Brandstetter, F. K. Tittel, B. Lendl, “Quartz-enhanced photoacoustic spectroscopy-based sensor system for sulfur dioxide detection using a CW DFB-QCL.” Applied Physics B: (2014) [pdf]

[171] R. Lewicki, M. Jahjah, B. Foxworth, Y. Ma, L. Dong, R. Griffin, K. Krzempek, P. Stefanski, F. K. Tittel, J. Tarka, “Mid-infrared Laser Based Gas Sensor Technologies for Environmental Monitoring, Medical Diagnostics, Industrial and Security Applications.” Springer Science+Business Media Dordrecht, (2014) [pdf]

[170] W. Ren, W. Jiang, N.P. Sanchez, P. Patimisco, V. Spagnolo, C. Zah, F. Xie, L. C. Hughes, R. J. Griffin, F. K. Tittel, “Hydrogen peroxide detection with quartz-enhanced photoacoustic spectroscopy using a distributed-feedback quantum cascade laser.” Applied Physics Letters 104: (2014) [pdf]

[169] M. Jahjah, W. Ren, P. Stefanski, R. Lewicki, J. Zhang, W. Jiang, J. Tarka, F. K. Tittel, “A compact QCL based methane and nitrous oxide sensor for environmental and medical applications.” The Royal Society of Chemistry Analyst: (2014) [pdf]

[168] M. Jahjah, W. Jiang, N. P. Sanchez, W. Ren, P. Patimisco, V. Spagnolo, S.c Herndon, R.J. Griffin, F. K. Tittel, “Atmospheric CH4 and N2O measurements near Greater Houston are landfills using QCL based QEPAS sensor system during DISCOVER-AQ 2013.” Optics Letters 39: 957-960 (2014) [pdf]

[167] H. Wu, H. Zheng, Y. Liu, X. Liu, W. Jiang, L. Zhang, W. Ma, W. Ren, W. Yin, S. Jia, L. Dong, F. K. Tittel, “Double acoustic microresonator quartz-enhanced photoacoustic spectroscopy, April 15, 2014 / Vol. 39, No. 8 / OPTICS LETTERS.” (2014) [pdf]

2013

[166] F.K. Tittel, R. Lewicki, “Tunable mid-infrared laser absorption spectroscopy.”, Woodhead Publishing Ltd., (2013) [pdf]

[165] S. Solga, T. Schwartz, M. Mudalel, L. Spacek, R. Lewicki an F.K. Tittel, C. Loccioni, T. Risby, “Factors influencing breath ammonia determination.” J. Breath Research 7: (2013) [pdf]

[164] F.K. Tittel, R. Lewicki, R. Lascola, S. McWhorter, “Emerging infrared laser absorption spectroscopic techniques for gas analysis.”, John Wiley and Sons Inc., 71-109 (2013) [pdf]

[163] Y. Ma, R. Lewicki, M. Razeghi, F.K. Tittel, “QEPAS based ppb-level detection of CO and N2O using a high power CW DFB-QCL.” Optics Express 21: 1008-1019 (2013) [pdf]

[162] R. Lewicki, M. Jahjah, Y. Ma, P. Stefanski, J. Tarka, M. Razeghi, F.K. Tittel, “Current Status of Mid-Infrared Semiconducto Laser Based Sensor Technologies for Trace Gas Sensing Applications.”, SPIE Press, (2013) [pdf]

[161] K. Krzempek, M. Jahjah, R. Lewicki, P. Stefanski, S. So, D. Thomazy, F.K. Tittel, “CW DFB RT diode laser based sensor for trace-gas detection of ethane using novel compact multipass gas absorption cell.” Appl. Phys. B. (2013) [pdf]

[160] L. Gong, R. Lewicki, R.J. Griffin, B. Karakurt Cevik, A.P. Rutter, F.K. Tittel, J.H. Flynn, B.L. Lefer, E. Scheuer, J.E. Dibb, S. Kim, “Characterization of atmospheric ammonia near Fort Worth, TX – Part I. Dynamics of gaseous ammonia.” Journal of Geophysical Research – Atmospheres (2013) [pdf]

[159] A. Kachanov, S. Koulikov, F.K. Tittel, “Cavity Enhanced Optical Feedback Assisted Photoacoustic Spectroscopy with a 10.4 microns External-Cavity Quantum Cascade Laser.” Appl. Phys. B 110: 47-56 (2013) [pdf]

[158] L. Gong, R. Lewicki, R. Griffin, F.K. Tittel, C.R. Lonsdale, R.G. Stevens, J.R. Pierce, Q.G.J. Malloy, S.A. Travis, L.M. Bobmanuel, B.L. Lefer, J.H. Flynn, “Role of Atmospheric ammonia in particulate matter formation in Houston, TX during summertime.” Atmospheric Envi 77: 893-900 (2013) [pdf]

[157] F.K. Tittel, R. Lewicki, M. Jahjah, B. Foxworth, Y. Ma, “Mid-Infrared Laser based Gas Sensor Technologies for Environmental Monitoring, Medical Diagnostics, Industrial and Security Applications.” Chapter 21 in “Terahertz and Mid Infrared Radiation: Detection of Explosives and CBRN (using Terahertz), Nato Science for Peace and Security Series B: Physics and Biophsycs”, 153-165, Springer Science+Business (2014) [pdf]

[156] L. Gong, R. Lewicki, Y.J. Leong, B. Karakurt Cevik, A.P. Rutter, K.M. Shakya, R.J. Griffin, F.K. Tittel, J.H. Flynn, B.L. Lefer, E. Scheuer, J.E. Dibb, S. Kim, “Characterization of atmospheric ammonia near Fort Worth, TX – Part II. Impact of ammonia on particulate matter formation.” Journal of Geoph (2013) [pdf]

2012

[155] V. Spagnolo, L Dong, A. A. Kosterev, F. K. Tittel, “Modulation cancellation method for isotope 18^O/16^O.” Optics Express 20, 3401: (2012) [pdf]

[154] F. K. Tittel, L. Dong, R. Lewicki, G. Lee, A. Peralta, V. Spagnolo, “Sensitive detection of nitric oxide using a 5.26 micro-m external cavity quantum cascade laser based QEPAS sensor.” Proc. of SPIE 8268: (2012) [Quantum sensing and nanophotonic devices IX] [pdf]

[153] K. Krzempek, R. Lewicki, L. Naehle, M. Fischer, J. Koeth, S. Behahsene, Y. Roulard, L. Worschech, F.K. Tittel, “Continuous wave, distributed feedback diode laser based sensor for trace gas detection of ethane.” Appl Phys B 106: 251-255 (2012) [pdf]

[152] L. Gong, R. Lewicki, R.J. Griffin, F.K. Tittel, J.R. Pierce, C. Lonsdale, R. Stevens, Q. Malloy, S. Travis, L. Bobomanuel, B.L. Lefer, J.H. Flynn, “Atmospheric ammonia measurements and implications for particular matter formation in Houston TX.” (2012) [pdf]

[151] L. Dong, J. Wright, B. Peters, B.A. Ferguson, F.K. Tittel, S. McWhorter, “Compact QEPAS sensor for trace methane and ammonia detection in impure hydrogen.” Appl Phys B (2012) [pdf]

[150] L. Dong, R. Lewicki, K. Liu, P.R. Buerki, M.J. Weida, F.K. Tittel, “Ultra- sensitive carbon monoxide detection by using EC-QCL based quartz-enhanced photoacoustic spectroscopy.” Appl Phys B 107: 275-283 (2012) [pdf] 

2011

[149] C. A. Zaugg, R. Lewicki, T. Day, R. F. Curl, F. K. Tittel, “Faraday rotation spectroscopy of nitrogen dioxide based on a widely tunable external cavity quantum cascade laser.” Proc. of SPIE 7945: 50O-1 (2011) [pdf]

[148] F.K. Tittel, R.F. Curl, L. Dong, J.H. Doty, A.A. Kosterev, R. Lewicki, D. Thomazy, G. Wysocki, “Recent Advances in Infrared Semiconductor Laser based Chemical Sensing Technologies.”, Springer, Proc. of NATO Advanced Research Workshop, Marmaris, Turkey, 3-6 Nov. 2009: 165-173 (2011) [pdf]

[147] V. Spagnolo, L. Dong, A.A. Kosterev, D. Thomazy, J.H. Doty III, F.K. Tittel, “Modulation cancellation method in laser spectroscopy.” Appl. Phys. B 103: 735-742 (2011) [pdf]

[146] V. Spagnolo, L. Dong, A. A. Kosterev, D. Thomazy, J. H. Doty, F. K. Tittel, “Modulation cancellation method for laser spectroscopy.” Proc. of SPIE 7945: 50I-1 (2011) [pdf]

[145] V. Spagnolo, L. Dong, A. A. Kosterev, D. Thomazy, J. H. Doty, F. K. Tittel, “Modulation cancellation method for measurements of small temperature differences in a gas.” Optics Letters 36: 460-462 (2011) [pdf]

[144] N. Petra, J. Zweck, S. E. Minkoff, A. A. Kosterev, J. H. Doty, “Modeling and Design optimization of a resonant optothermoacoustic trace gas sensor.” SIAM J. of Appl. Math 71: 309-332 (2011) [pdf]

[143] M. R. McCurdy, A. Sharafkhaneh, H. Abdel-Monem, J. Rojo, F. K Tittel, “Exhaled nitric oxide parameters and functional capacity in chronic obstructive pulmonary disease.” Journal of Breath Research 5: 016003 (2011) [pdf]

[142] R. Lewicki, A. A. Kosterev, D. M. Thomazy, T. H. Risby, S. Solga, T. B. Schwartz, F. K. Tittel, “Real time ammonia detection in exhaled human breath using a distributed feedback quantum cascade laser based sensor.” Proc. of SPIE 7945: 50K-2 (2011) [pdf]

[141] J. H. Doty, A. A. Kosterev, F. K. Tittel, “Recent Advances in Resonant Optothermalacoustic Detection.” Proc. of SPIE 7945: 50Q-1 (2011) [pdf]

[140] L. Dong, A. A. Kosterev, D. Thomazy, F. K. Tittel, “Compact Portable QEPAS Multi-gas Sensor.” Proc. of SPIE 7945: 50R-1 (2011) [pdf]

2010

[139] V. Spagnolo, A. A. Kosterev, L. Dong, R. Lewicki, F. K. Tittel, “NO trace gas sensor based on quartz enhanced photoacoustic spectroscopy and external cavity quantum cascade laser.” App. Phys. B 100: 125-130 (2010) [pdf]

[138] D.V. Serebryakov, I.V. Morozov, A. A. Kosterev, V.S. Letokhov, “Laser microphotoacoustic sensor of ammonia traces in the atmosphere.” Quantum Electronics (Russian) 40: 167-172 (2010) [pdf]

[137] T. H. Risby, F. K. Tittel, “Current status of mid-infrared quantum and interband cascade lasers for clinical breath analysis.” Optical Engineering 49: 111123-1-14 (2010) [pdf]

[136] K. Liu, H. Yi, A. A. Kosterev, W. Chen, L. Dong, L. Wang, T. Tan, W. Zhang, F. K. Tittel, X. Gao, “Trace gas detection based on off-beam quartz enhanced photoacoustic spectroscopy: Optimization and performance evaluation.” Review of Scientific Instruments 81: 103103 (2010) [pdf]

[135] A.A. Kosterev, J.H. Doty, “Resonant optothermoacoustic detection: technique for measuring weak optical absorption by gases and micro-objects.” Optics Letters 35: 3571-3573 (2010) [pdf]

[134] A.A. Kosterev, L. Dong, D. Thomazy, F.K. Tittel, S. Overby, “QEPAS for chemical analysis of multi-component gas mixtures.” App. Phys. B 101: 649-659 (2010) [pdf]

[133] A. A. Kosterev, P. R. Buerki, L. Dong, M. Reed, T. Day, F. K. Tittel, “QEPAS detector for rapid spectral measurements.” App. Phys. B 100: 173-180 (2010) [pdf]

[132] L. Dong, A. A. Kosterev, D. Thomazy, F. K. Tittel, “QEPAS spectrophones: design, optimization, and performance.” Appl Phys B 100: 627-635 (2010) [pdf]

[131] R. F. Curl, F. Capasso, C. Gmachl, A. A Kosterev, B. McManus, R. Lewicki, M. Pusharsky, G. Wysocki, F. K. Tittel, “Quantum cascade lasers in chemical physics.” Chemical Physics Letters 487: 1-18 (2010) [pdf]

2009

[130] N. Weppenaar, A. A. Kosterev, L. Dong, D. Thomazy, F. K. Tittel, “Fiberoptic Gas Monitoring of Flexible Risers.” (2009) [pdf]

[129] S. So, A. A. Sani, L. Zhong, F. K. Tittel, G. Wysocki, “Laser Spectroscopic Trace-Gas Sensor Networks for Atmospheric Monitoring Applications.” (2009) [pdf]

[128] S. Schilt, A. A Kosterev, F. K. Tittel, “Performance evaluation of a near infrared QEPAS based ethylene sensor.” Applied Physics B 95: 813-824 (2009) [pdf]

[127] D. Richter, B. P. Wert, A. Fried, P. Weibring, J. G. Walega, J. W. White, B. H. Vaughn, F. K. Tittel, “High precision carbon dioxide isotope spectrometer with a difference frequency generation laser source.” Optics Letters 34 34: 172-174 (2009) [pdf]

[126] R. Lewicki, J. H. Doty III, R. F. Curl, F. K. Tittel, G. Wysocki, “Ultra-sensitive Detection of Nitric Oxide at 5.33 μm using External Cavity Quantum Cascade Laser based Magnetic Rotation Spectroscopy.” PNAS 106: 12587-12592 (2009) [pdf]

[125] N. Petra, J. Zweck, A. A. Kosterev, S. E. Minkoff, D. Thomazy, “Theoretical Analysis of a Quartz-Enhanced Photoacoustic Spectroscopy Sensor.” Appl Phys B 94: 673-680 (2009) [pdf]

[124] K. Liu, J. Li, L. Wang, T. Tang, W. Zhang, X. Gao, W. Chen, F. K. Tittel, “Trace gas sensor based on quartz tuning fork enhanced laser photoacoustic spectroscopy.” Applied Physics B 94: 527-533 (2009) [pdf]

[123] C. Bauer, U. Willer, R. Lewicki, A. Pohlkotter, A. A. Kosterev, D. Kosynkin, F. K. Tittel, W Schade, “A Mid-infrared QEPAS sensor device for TATP detection.” Journal of Physics: Conference Series 157: 012002 (2009) [pdf]

2008

[122] G. Wysocki, R. Lewicki, R. F. Curl, F. K. Tittel, L. Diehl, F. Capasso, M. Troccoli, G. Hoffler, D. P. Bour, S. W. Corzine, R. Maulini, J. Faist, “Widely tunable mode-hop free external cavity quantum cascade lasers for high resolution spectroscopy and chemical sensing.” Applied Physics B 92: 305-311 (2008) [pdf]

[121] M. Troccoli, L. Diehl, D. P. Bour, S. W. Corzine, N. Yu, C. H. Wang, M. A. Belkin, G. Höfler, R. Lewicki, G. Wysocki, F. K Tittel, F. Capasso, “High-Performance Quantum Cascade Lasers Grown by Metal-Organic Vapor Phase Epitaxy and Their Applications to Trace Gas Sensing.” Journal of Lightwave Technology 26: 3534-3555 (2008) [pdf]

[120] F. K. Tittel, G. Wysocki, A. A Kosterev, Y. A. Bakhirkin, “Semiconductor Laser Based Trace Gas Sensor Technology: Recent Advances and Applications.” (2008) [pdf]

[119] F. K. Tittel, Y. A. Bakhirkin, A. A. Kosterev, R. Lewicki, S. So, G. Wysocki, R. F. Curl, “Recent Advances and Applications of Mid-Infrared based Trace Gas Sensor Technology.” (2008) [pdf]

[118] A. A. Kosterev, G. Wysocki, Y. A. Bakhirkin, S. So, R. Lewicki, F. K. Tittel, R. F. Curl, “Application of quantum cascade lasers to trace gas analysis M. Sigrist (Ed.) Selected papers from the International Conference on Tunable Lasers and Fundamental Laser Spectroscopy.” Applied Physics B 90: 165-176 (2008) [pdf]

[117] A. A. Kosterev, F. K. Tittel, G. Bearman, “Advanced quartz-enhanced photoacoustic trace gas sensor for early fire detection.” (2008) [pdf]

[116] A. A. Kosterev, Y. A. Bakhirkin, F. K. Tittel, S. McWhorter, B. Ashcraft, “QEPAS methane sensor performance for humidified gases.” Applied Physics B 92: 103-109 (2008) [pdf]

[115] A. Fried, J. G. Walega, J. R. Olson, J. H. Crawford, G. Chen, P. Weibring, D. Richter, C. Roller, F. K. Tittel, B. Heikes, J. Snow, H. Shen, D. Sullivan, M. Porter, H. Feulberg, J. Halland, D. Millet, D. Jacob, “Formaldehyde over North America and the North Atlantic during the Summer 2004 INTEX Campaign: Methods, Observed Distributions, and Measurement Box Model Comparisons.” J.Geophys. Res. 113: 10302-10302 (2008) [pdf]

[114] A. Fried, J. R. Olson, J. G. Walega, J. H. Crawford, G. Chen, P. Weibring, D. Richter, C. Roller, F. K. Tittel, M. Porter, H. Fuelberg, J. Halland, T. H. Bertram, R. C. Cohen, K. Pickering, B. G. Heikes, J. A. Snow, H. Shen, D. W. O’Sullivan, W. H. Brune, X. Ren, D. R. Blake, N. Blake, G. Sachse, G. S. Diskin, J. Podolske, S. A. Vay, R. E. Shetter, S. R. Hall, B. E. Anderson, L. Thornhill, A. D. Clarke, C. S. McNaughton, H. B. Singh, M. A, Avery, G. Huey, S. Kim, D. B. Millet, “The Role of Convection in Redistributing Formaldehyde to the Upper Troposphere over North America and the North Atlantic during the Summer 2004 INTEX Campaign.” J. Geophys. Res. 113: 17306-17306 (2008) [pdf]

[113] W. Chen, A. A. Kosterev, F. K. Tittel, X. Gao, W. Zhao, “H2S trace concentration measurements using Off-Axis Integrated Cavity Output Spectroscopy in the Near-Infrared Selected papers from the International Conference on Tunable Lasers and Fundamental Laser Spectroscopy.” Applied Physics B 90: 311-315 (2008) [pdf]

2007

[112] G. Wysocki, Y. A. Bakhirkin, S. So, F. K. Tittel, C. J. Hill, R. Q. Yang, M. P. Fraser, “Dual interband cascade laser based trace-gas sensor for environmental monitoring.” Appl. Opt. 46: 8202-8210 (2007) [pdf]

[111] S. G. So, F. Koushanfar, A. A. Kosterev, F. K. Tittel, “LaserSPECks:: laser SPECtroscopic trace-gas sensor networks – sensor integration and applications.” (2007) [pdf]

[110] A. K. Ngai, S. T. Persijni, D. Lindsay, A. A. Kosterev, P. Gross, C. J. Lee, C. M. Cristescu, F. K. Tittel, K. J. Boller, F. J. Harren, “Continuous Wave Optical Parametric Oscillator for Quartz-Enhanced Photoacoustic Trace Gas Sensing.” Appl. Phys. B 89: 123-128 (2007) [pdf]

[109] M. R. McCurdy, Y. A. Bakhirkin, G. Wysocki, F. K Tittel, “Performance of an exhaled nitric oxide and carbon dioxide sensor using quantum cascade laser-based integrated cavity output spectroscopy.” Journal of Biomedical Optics 12: 1-9 (2007) [pdf]

[108] M. R. McCurdy, Y. A. Bakhirkin, G. Wysocki, R. Lewicki, F. K. Tittel, “Recent advances of laser-spectroscopy-based techniques for applications inbreath analysis.” Journal of Breath Research 1: 014001-014001 (2007) [pdf]

[107] R. Lewicki, G. Wysocki, A. A. Kosterev, F. K. Tittel, “Carbon Dioxide and ammonia detection using 2μm diode laser based quartz-enhanced photoacoustic spectroscopy.” Appl. Phys. B 87: 157-162 (2007) [pdf]

[106] R. Lewicki, G. Wysocki, A. A. Kosterev, F. K. Tittel, “QEPAS based detection of broadband absorbing molecules using a widely tunable, cw quantum cascade laser at 8.4 μm.” Optics Express 15: 7357-7366 (2007) [pdf]

[105] W. Chen, J. Cousin, E. Poullet, J. Burie, D. Boucher, X. Gao, M. W. Sigrist, F. K. Tittel, “Continuous-wave mid-infrared laser sources based on difference frequency generation.” Special Issue ”Optical Parametric Sources in the Infrared”, Comptes Rendus Physique 8: 1129-1150 (2007) [pdf]

2006

[104] G. Wysocki, A. A. Kosterev, F. K. Tittel, “Influence of molecular relaxation dynamics on quartz-enhanced photoacoustic detection of CO2 at λ = 2 μm.” Appl. Phys. B 85: 301-306 (2006) [pdf]

[103] F. K. Tittel, D. Weidmann, C. Oppenheimer, L. Gianfrani, “Laser Absorption Spectroscopy for Volcano Monitoring.” OPN 17: 24-31 (2006) [pdf]

[102] F. K. Tittel, Y. A. Bakhirkin, A. A. Kosterev, G. Wysocki, “Recent Advances in Trace Gas Detection Using Quantum and Interband Cascade Lasers.” The Review of Laser Engineering 34: 275-284 (2006) [pdf]

[101] S. G. So, G. Wysocki, J. P. Frantz, F. K. Tittel, “Development of Digital Signal Processor controlled Quantum Cascade Laser based Trace Gas Sensor Technology.” IEEE Sensors J. 6: 1057-1067 (2006) [pdf]

[100] C. Roller, A. Fried, J. G. Walega, P. Weibring, F. K. Tittel, “Advances in hardware, system diagnostics software, and acquisition procedures for high performance airborne tunable diode laser measurements of formaldehyde.” Appl. Phys. B 82: 247-264 (2006) [pdf]

[99] J. H. Miller, Y. A. Bakhirkin, T. Ajtai, F. K. Tittel, C. J. Hill, R. Q. Yang, “Detection Of Formaldehyde Using Off-Axis Integrated Cavity Output Spectroscopy With An Interband Cascade Laser.” Appl. Phys. B 85: 391-396 (2006) [pdf]

[98] M. R. McCurdy, Y. A. Bakhirkin, F. K. Tittel, “Quantum cascade laser-based integrated cavity output spectroscopy of exhaled nitric oxide.” Appl. Phys. B 85: 445-452 (2006) [pdf]

[97] A. A. Kosterev, T. S. Moseley, F. K. Tittel, “Impact of humidity on quartz-enhanced photoacoustic spectroscopy based detection of HCN.” Appl. Phys. B. 85: 295-300 (2006) [pdf]

[96] Y. A. Bakhirkin, A. A. Kosterev, R. F. Curl, F. K. Tittel, D. A. Yarekha, L. Hvozdara, M. Giovannini, J. Faist, “Sub-ppbv nitric oxide concentration measurements using cw thermoelectrically cooled quantum cascade laser-based integrated cavity output spectroscopy.” Applied Physics B 82: 149-154 (2006) [pdf]

2005

[95] G. Wysocki, A. A. Kosterev, F. K. Tittel, “Spectroscopic trace-gas sensor with rapidly scanned wavelengths of a pulsed quantum cascade laser for in situ NO monitoring of industrial exhaust systems.” App. Phys. B 80: 617-625 (2005) [pdf]

[94] G. Wysocki, R. F. Curl, F. K. Tittel, R. Maulini, J. M. Bulliard, J. Faist, “Widely tunable mode-hop free external cavity quantum cascade laser for high resolution spectroscopic applications.” Appl. Phys. B 81: 769-777 (2005) [pdf]

[93] D. Weidmann, G. Wysocki, C. Oppenheimer, F. K. Tittel, “Development of a compact quantum cascade laser spectrometer for field measurements of CO2 isotopes.” Applied Physics B 80: 255-260 (2005) [pdf]

[92] D. Weidmann, C. Roller, C. Oppenheimer, A. Fried, F. K. Tittel, “Carbon isotopomers measurement using mid-IR tunable laser sources.” Isotopes in Environmental and Health Studies 41: 293-302 (2005) [pdf]

[91] A. A. Kosterev, F. K. Tittel, D. Serebryakov, A. L. Malinovsky, I. Morozov, “Applications of Quartz Tuning Forks in Spectroscopic Gas Sensing.” Rev. Sci. Instr. 76: 1-9 (2005) [pdf]

[90] A. A. Kosterev, Y. A. Bakhirkin, F. K. Tittel, “Ultrasensitive gas detection by quartz-enhanced photoacoustic spectroscopy in the fundamental molecular absorption bands region.” Applied Physics B 80: 133-138 (2005) [pdf]

2004

[89] G. Wysocki, M. McCurdy, S. So, D. Weidmann, C. Roller, R. F. Curl, F. K. Tittel, “Pulsed quantum-cascade laser-based sensor for trace-gas detection of carbonyl sulfide.” Applied Optics 43: 6040-6046 (2004) [pdf]

[88] D. Weidmann, F. K. Tittel, T. Aellen, M. Beck, D. Hofstetter, J. Faist, S. Blaser, “Mid-infrared trace-gas sensing with a quasicontinuous-wave Peltier-cooled distributed feedback quantum cascade laser.” Appl. Phys. B 79: 907-913 (2004) [pdf]

[87] D. Weidmann, A. A. Kosterev, F. K. Tittel, N. Ryan, D. McDonald, “Application of a widely electrically tunable diode laser to chemical gas sensing with quartz-enhanced photoacoustic spectroscopy.” Optics Letters 29: 1837-1839 (2004) [pdf]

[86] D. Weidmann, A. A. Kosterev, C. Roller, R. F. Curl, M. P. Fraser, F. K. Tittel, “Monitoring of ethylene by a pulsed quantum cascade laser.” Applied Optics 43: 3329-3334 (2004) [pdf]

[85] D. C. Larrabe, G. A. Khodaparast, F. K. Tittel, J. Kono, M. Rochat, and A. Ajili, J. Faist, H. E. Beere, E. H. Linfield, K. Ueda, Y. Nakajima, M. Nakai, S. Sasa, M. Inoue, S. J. Chung, M. B. Santos, “Application of Terahertz Quantum Cascade Lasers to Semiconductor Cyclotron Resonance.” Optics Letters 29: 122-124 (2004) [pdf]

[84] A. A. Kosterev, F. K. Tittel, “Ammonia detection using quartz-enhanced photoacoustic spectroscopy with a near-IR telecommunication diode laser.” Applied Optics 43: 6213-6217 (2004) [pdf]

[83] A. A. Kosterev, Y. A. Bakhirkin, F. K. Tittel, S. Blaser, Y. Bonetti, L. Hvozdara, “Photoacoustic phase shift as a chemically selective spectroscopic parameter.” Applied Physics B (Rapid Communications) 78: 673-676 (2004) [pdf]

[82] M. Horstjann, Y. A. Bakhirkin, A. A. Kosterev, R. F. Curl, F. K. Tittel, C. M. Wong, C.J. Hill, R. Q. Yang, “Formaldehyde sensor using interband cascade laser based quartz-enhanced photoacoustic spectroscopy.” Appl. Phys. B 79: 799-803 (2004) [pdf]

[81] J. Chen, S. So, H. Lee, M. P. Fraser, R. F. Curl, T. L. Harman, F. K. Tittel, “Atmospheric Formaldehyde Monitoring in the Greater Houston Area in 2002.” Applied Spectroscopy 58: 243-247 (2004) [pdf]

[80] A. Barkan, F. K. Tittel, D. M. Mittelman, R. Dengler, P. H. Siegel, G. Scalari, L. Ajili, J. Faist, H. E. Beere, E. H. Linfield, A. G. Davies, D. A. Richie, “Linewidth and tuning characteristics of THz quantum cascade laser.” Optics Letters 6: 575-577 (2004) [pdf]

[79] Y. A. Bakhirkin, A. A. Kosterev, C. Roller, R. F. Curl, F. K. Tittel, “Mid-Infrared Quantum Cascade Laser based Off-Axis Integrated Cavity Output Spectroscopy for Biogenic NO Detection.” Applied Optics 43: 2247-2266 (2004) [pdf]

2003

[78] C. Roller, A. A. Kosterev, F. K. Tittel, K. Uehara, C. Gmachl, D. L. Sivco, “Carbonyl sulfide detection with a thermoelectrically cooled mid-infrared quantum cascade laser.” Optics Letters 28: 2045-2052 (2003) [pdf]

2002

[77] D. Richter, A. Fried, B. P. Wert, J. G. Walega, F. K. Tittel, “Development of a tunable mid-IR difference-frequency laser source for highly-sensitive airborne trace gas detection.” Applied Physics B 75: 281-288 (2002) [pdf]

[76] D. Richter, M. Erdelyi, R. F. Curl, F. K. Tittel, C. Oppenheimer, H. J. Duffell, M. Burton, “Field measurements of volcanic gases using tunable diode laser based mid-infrared and Fourier transform infrared spectrometers.” Optics and Lasers in Engineering 37: 171-186 (2002) [pdf]

[75] D. Leleux, R. Claps, W. Chen, F. K. Tittel, T. L. Harman, “Applications of Kalman filtering to real-time trace gas concentration measurements.” Appl. Phys. B 74: 85-93 (2002) [pdf]

[74] A. A. Kosterev, F. K. Tittel, R. Köhler, C. Gmachl, F. Capasso, D. L. Sivco, A. Y. Cho, S. Wehe, M. G Allen, “Thermoelectrically cooled quantum-cascade-laser-based sensor for the continuous monitoring of ambient atmospheric carbon monoxide.” Applied Optics 41: 1169-1173 (2002) [pdf]

[73] A. A. Kosterev, F. K. Tittel, W. Durante, M. G. Allen, R. Köhler, C. Gmachl, F. Capasso, D. L. Sivco, A. Y. Cho, “Detection of biogenic CO production above vascular cell cultures using a near-room-temperature QC-DFB laser.” Applied Phys. B 74: 95-99 (2002) [pdf]

[72] A. A. Kosterev, F. K. Tittel, R. F. Curl, M. Rochat, J. Faist, “Chemical sensing applications with long wavelength mid-infrared QC-lasers.” Applied Physics B 75: 351-357 (2002) [pdf]

[71] A. A. Kosterev, F. K. Tittel, “Chemical Sensors Based on Quantum Cascade Lasers.” IEEE JQE Special Issue on Quantum Cascade Lasers 38: 582-591 (2002) [pdf]

[70] A. A. Kosterev, R. F. Curl, F. K. Tittel, R. Köhler, C. Gmachl, F. Capasso, D. L. Sivco, A. Y. Cho, “Transportable automated ammonia sensor based on a pulsed thermoelectrically cooled quantum-cascade distributed feedback laser.” Applied Optics 41: 573-578 (2002) [pdf]

[69] A. A. Kosterev, Y. A. Bakhirkin, R. F. Curl, F. K. Tittel, “Quartz-enhanced photoacoustic spectroscopy.” Optics Letters 27: 1902-1904 (2002) [pdf]

[68] S. Friedfeld, M. P Fraser, K. Ensor, S. Tribble, D. Rehle, D. Leleux, F. K. Tittel, “Statistical analysis of primary and secondary atmospheric formaldehyde.” Atmospheric Environment 36: 4767-4775 (2002) [pdf]

[67] M. Erdelyi, D. Richter, F. K. Tittel, “13CO2/12CO2 isotopic ratio measurements using a difference-frequency-based sensor operating at 4.35 μm.” Applied Phys. B 75: 289-295 (2002) [pdf]

[66] R. F. Curl, F. K. Tittel, “Tunable infrared laser spectroscopy.” (2002) [pdf]

[65] W. Chen, D. Boucher, F. K. Tittel, “Recent advances in continuous-wave laser difference-frequency generation in the mid-infrared: State of the art applications and perspectives.” Recent Res. Devel. Applied Phys. 5: 27-68 (2002) [pdf]

[64] Z. Bozoki, A. Mohacsi, G. Szabo, Z. Bor, M. Erdelyi, W. Chen, F. K. Tittel, “Near Infrared Diode Based Spectroscopic Detection of Ammonia: A Comparative Study of Photoacoustic and Direct Optical Absorption Methods.” Applied Spectroscopy 56: 715-719 (2002) [pdf]

2001

[63] M. E. Webber, R. Claps, F. V. Englich, F. K. Tittel, J. B. Jeffries, R. K. Hanson, “Measurements of NH3 and CO2 with DFB Diode Lasers Near 2.0 μm in Bioreactor Vent Gases.” Applied Optics 40: 4395-4403 (2001) [pdf]

[62] D. Rehle, D. Leleux, M. Erdelyi, F. K. Tittel, M. P. Fraser, S. Friedfeld, “Ambient Formaldehyde Detection with a Laser Spectrometer based on Difference Frequency Generation in PPLN.” Appl. Phys. B 72: 947-952 (2001) [pdf]

[61] K. P. Petrov, L. Goldberg, W. K. Burns, R. F. Curl, F. K. Tittel, “Detection of CO in Air Using Diode-Pumped 4.6 μm Difference Frequency Generation in Quasi-Phase Matched LiNbO3.” Applied Phys. B 72: 873-876 (2001)

[60] Y. Morimoto, W. Durante, D. G. Lancaster, J. Klattenhoff, F. K. Tittel, “Real-time measurement of endogenous CO production from vascular cells using an ultrasensitive laser sensor.” Am. J. Physiology: Heart and Circulatory Physiology 280: 483-488 (2001) [pdf]

[59] L. Menzel, A. A. Kosterev, F. K. Tittel, C. Gmachl, F. Capasso, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, W. Urban, “Spectroscopic detection of biological NO with a quantum cascade laser.” Applied Physics B 72: 859-863 (2001) [pdf]

[58] N. Matsuoka, S. Yamaguchi, K. Nanri, T. Fujioka, D. Richter, F. K. Tittel, “Yb fiber laser pumped min-IR source based on difference frequency generation and its application to ammonia detection.” Jap. J. Appl. Phys 40: 625-628 (2001) [pdf]

[57] A. A. Kosterev, A. L. Malinovsky, F. K. Tittel, C. Gmachl, F. Capasso, D. L. Sivco, J. N Baillargeon, A. L. Hutchinson, A. Y. Cho, “Cavity ringdown spectroscopic detection of nitric oxide with a continuous-wavequantum-cascade laser.” Applied Optics 40: 5522-5529 (2001) [pdf]

[56] R. Claps, F. V. Englich, D. Leleux, D. Richter, F. K. Tittel, R. F. Curl, “Ammonia detection using near infrared diode laser based overtone spectroscopy.” Applied Optics 40: 4376-4386 (2001) [pdf]

[55] W. Chen, G. Mouret, D. Boucher, F. K. Tittel, “Mid-infrared trace gas detection using Continuous-Wave Difference Frequency Generation in Periodically Poled RbTiOAsO4.” Applied Phys. B 72: 873-876 (2001) [pdf]

2000

[54] F. K. Tittel, D. G. Lancaster, D. Richter, “Novel Diode Laser Based Sensors for Gas Sensing Applications.” Laser Physics 10: 1-7 (2000)

[53] D. Richter, F. K. Tittel, J. Bahr, D. Wickham, J. Wright, J. C. Graf, “Diode Laser Based Formaldehyde Measurements in a Catalytic Trace Contaminant Control System.” (2000)

[52] D. Richter, D. G. Lancaster, F. K. Tittel, “Development of an automated diode laser based multi-component gas sensor.” Applied Optics 39: 4444-4450 (2000) [pdf]

[51] J. Limpert, H. Zellmer, S. Tuennermann, D. G. Lancaster, R. Weidner, D. Richter, F. K. Tittel, “Tunable cw DFG-based gas sensor using a fiber amplified 1.5 μm external cavity diode laser and a high power 1 μm diode laser.” Electron. Lett. 36: 1739-1741 (2000)

[50] D. G. Lancaster, D. Richter, R. F. Curl, F. K. Tittel, “Diode Lasers, DFG and Molecules.” OSA TOPS – Advanced Semiconductor and Lasers and Their Applications 31: 43-46 (2000)

[49] D. G. Lancaster, A. Fried, B. P. Wert, B. Henry, F. K. Tittel, “Difference-frequency-based tunable absorption spectrometer for detection of atmospheric formaldehyde.” Applied Optics 39: 4436-4443 (2000) [pdf]

[48] D. G. Lancaster, R. Weidner, D. Richter, F. K. Tittel, J. Limpert, “Compact CH4 sensor based on difference frequency mixing of diode laser in quasi-phased matched LiNbO3.” Optics Communications 175: 461-468 (2000)

[47] A. A. Kosterev, F. K. Tittel, C. Gmachl, F. Capasso, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, “Trace gas detection in ambient air with a thermoelectrically cooled QC-DFB laser.” Applied Optics 39: 6866-6872 (2000) [pdf]

[46] A. A. Kosterev, R. F. Curl, F. K. Tittel, C. Gmachl, F. Capasso, D. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, “Effective utilization of quantum-cascade distributed-feedback lasers in absorption spectroscopy.” Applied Optics 39: 4425-4430 (2000) [pdf]

[45] S. Friedfeld, M. P. Fraser, D. G. Lancaster, D. Leleux, D. Rehle, F. K. Tittel, “Field Intercomparison of a Novel Optical Sensor for Formaldehyde Quantification.” Geophysical Research Letters 27: 2093-2096 (2000) [pdf]

[44] M. Erdelyi, Z. Bor, W. L. Wilson, M. C. Smayling, F. K. Tittel, “Enhanced optical microlithography with a Fabry-Perot-based spatial filtering technique.” Applied Optics 39: 1121-1129 (2000) [pdf]

[43] W. Chen, F. Cazier, F. K. Tittel, D. Boucher, “Benzene concentration measurements using difference frequency laser absorption spectroscopy.” Applied Optics 39: 6238-6242 (2000) [pdf]

1999

[42] F. K. Tittel, D. G. Lancaster, D. Richter, R. F. Curl, “Laser based absorption sensors for trace gas monitoring in a spacecraft habitat.” (1999) [pdf]

[41] D. Richter, D. G. Lancaster, R. F. Curl, F. K. Tittel, “Tunable, fiber coupled spectrometer based on difference-frequency generation in periodically poled lithium niobate.” (1999) [pdf]

[40] D. G. Lancaster, D. Richter, F. K. Tittel, “Portable fiber coupled diode laser based sensor for multiple trace gas detection.” Applied Physics B – Lasers and Optics 69: 459-465 (1999) [pdf]

[39] D. G. Lancaster, D. Richter, R. F. Curl, F. K. Tittel, L. Goldberg, J. Koplow, “High-power continuous-wave mid-infrared radiation generated by difference frequency mixing of diode-laser-seeded fiber amplifiers and its application to dual-beam spectroscopy.” Optics Letters 24: 1744-1746 (1999) [pdf]

[38] A. A. Kosterev, R. F. Curl, F. K. Tittel, C. Gmachl, F. Capasso, D. Sivco, J. N. Baillargeon, A. L. Hutchinson, A. Y. Cho, “Methane concentration and isotopic composition measurements with a mid-infrared quantum-cascade laser.” Optics Letters 24: 1762-1764 (1999) [pdf]

[37] M. Erdelyi, K. Osvay, Z. Bor, W. L. Wilson, M. C. Smayling, F. K. Tittel, “Enhanced Microlithography using Coherent Multiple Imaging.” (1999)

[36] M. Erdelyi, K. Osvay, Z. Bor, W. L. Wilson, M. C. Smayling, F. K. Tittel, “Coherent Multiple Imaging by Means of Pupil Plane Filtering.” (1999)

[35] M. Erdelyi, A. Kroyan, K. Osvay, Z. Bor, W. L. Wilson, M. C. Smayling, F. K. Tittel, “Coherent Multiple Imaging by means of Pupil Plane Filter.” (1999)

[34] M. Erdelyi, Z. Bor, W. L. Wilson, M. C. Smayling, F. K. Tittel, “Simulation of Coherent Multiple Imaging by means of Pupil Plane Filtering in Optical Microlithography.” J. Opt. Soc. Am. A 16: 1909-1914 (1999) [pdf]

1998

[33] F. K. Tittel, M. Erdelyi, Z. L. Horvath, A. Kroyan, W. L. Wilson, M. C. Smayling, Z. Bor, G. Szabo, “Present and future trends in excimer-laser-based microlithography.” (1998)

[32] D. Richter, D. G. Lancaster, R. F. Curl, W. Neu, F. K. Tittel, “Compact mid-infrared trace gas sensor based on difference-frequency generation of two diode lasers in periodically poled LiNbO3.” Appl. Phys B – Special Issue: Environmental Trace Gas Detection using Laser Spectroscopy 67: 347-350 (1998) [pdf]

[31] K. P. Petrov, R. F. Curl, F. K. Tittel, “Compact laser difference-frequency spectrometer for multi-component trace gas detection.” Applied Physics B 66: 531-538 (1998) [pdf]

[30] D. G. Lancaster, D. Richter, R. F. Curl, F. K. Tittel, “Real-time measurements of trace gases using a compact difference-frequency-based sensor at 3.5 μm.” Appl. Phys B Special Issue: Environmental Trace Gas Detection using Laser Spectroscopy 67: 339-345 (1998) [pdf]

[29] D. G. Lancaster, L. Goldberg, J. Koplow, R. F. Curl, F. K. Tittel, “Fibre coupled difference frequency generation utilising ytterbium-doped fibre amplifier and periodically poled LiNbO3.” Electron. Lett. 34: 1345-1347 (1998)

[28] A. Kroyan, G. P. Watson, R. A. Cirelli, O. Nalamasu, A. E. Novembre, F. K. Tittel, “Sub- Resolution Assist Feature Tolerances for Contact Windows Using 193 nm Lithography.” (1998)

[27] A. Kroyan, M. D. Levenson, F. K. Tittel, “Coping with the Impact of Lens Aberrations in the Context of Wavefront Engineering.” (1998)

[26] L. Goldberg, D. G. Lancaster, J. Koplow, R. F. Curl, F. K. Tittel, “Mid-IR DFG source pumped by a 1.1 μm/1.5 μm dual wavelength fiber amplifier for trace gas detection.” Optics Letters 23: 1517-1519 (1998) [pdf]

[25] M. Erdelyi, Z. Bor, G. Szabo, F. K. Tittel, “Enhanced Microlithography using Coated Objectives and Image Duplication.” (1998)

1997

[24] T. Toepfer, K. P. Petrov, Y. Mine, J. Jundt, R. F. Curl, F. K. Tittel, “Room Temperature Mid-Infrared Laser Sensor for Trace Gas Detection.” Applied Optics 36: 8042-8049 (1997) [pdf]

[23] K. P. Petrov, S. Waltman, E. J. Dlugokencky, M. Arbore, M. M. Fejer, F. K. Tittel, L. Hollberg, “Precise measurement of CH4 in natural air samples using diode-pumped 3.4 μm difference-frequency source.” Applied Physics B 64: 567-571 (1997) [PDF]

[22] Y. Mine, N. Melander, D. Richter, D. G. Lancaster, K. P. Petrov, R. F. Curl, F. K. Tittel, “Detection of formaldehyde using mid-infrared difference frequency generation.” Applied Physics B 65: 771-774 (1997) [pdf]

[21] Z. L. Horvath, M. Erdelyi, G. Szabo, Z. Bor, F. K. Tittel, J. R. Cavallaro, “Generation of zero order Bessel beams with Fabry-Perot interferometer.” (1997)

[20] M. Erdelyi, G. Szabo, Z. Bor, F. K. Tittel, J. R. Cavallaro, “Generation of Nondiffracting Bessel Beams with Fabry-Perot Interferometer.” JOSA A 14: 3009-3013 (1997)

[19] M. Erdelyi, Z. L. Horvath, G. Szabo, Z. Bor, F. K. Tittel, J. R. Cavallaro, M. C. Smayling, “Generation of Diffraction-Free Beams for Applications in Optical Microlithography.” J. Vac. Sci. Technol. B 15: 287-292 (1997) [pdf]

[18] M. Erdelyi, Z. L. Horvath, Z. Bor, G. Szabo, J. R. Cavallaro, M. C. Smayling, F. K. Tittel, “Optical Microlithography with Nearly Nondiffracting Beams.” (1997)

[17] J. R. Cavallaro, C. Sengupta, W. L. Wilson, F. K. Tittel, “Automated Evaluation of Critical Features in VLSI Layouts Based on a Photolithographic Simulation.” IEEE Trans. on Semiconductor Manufacturing 10: 482-494 (1997)

1996

[16] F. K. Tittel, J. R. Cavallaro, M. C. Smayling, M. Erdelyi, G. Szabo, Z. Bor, “High Resolution Microlithography Applications of Deep-UV Excimer Lasers.” (1996)

[15] K. P. Petrov, R. F. Curl, L. Goldberg, “CW tunable 8.7 μm spectroscopic source pumped by fiber-coupled communications lasers.” Optics Letters 21: 1451-1453 (1996)

[14] M. Erdelyi, Z. Bor, G. Szabo, J. R. Cavallaro, M. C. Smayling, F. K. Tittel, W. L. Wilson, “Sub-quarter micron contact hole fabrication using annular illumination.” (1996)

[13] W. C. Eckoff, R. .S Putnam, S. Wang, R. F. Curl, F. K. Tittel, “A Continuously Tunable Long Wavelength CW IR Source for High-Resolution Spectroscopy and Trace Gas Detection.” Applied Physics B 63: 437-437 (1996)

1995

[12] K. P. Petrov, S. Waltman, R. F. Curl, F. K. Tittel, L. Hollberg, “Detection of Methane in Air Using Diode-Laser-Pumped Difference-Frequency Generation near 3.2 μm.” Appl Phys B 61: 553-558 (1995) [link]

[11] M. Kido, G. Szabo, J. R. Cavallaro, W. L. Wilson, M. C. Smayling, F. K. Tittel, “Submicron Optical Lithography Based on a New Interferometric Phase Shifting Technique.” Jpn. J. Appl. Phys. 34: 4269-4273 (1995) [PDF]

[10] M. Erdelyi, Z. Bor, F. K. Tittel, J. R. Cavallaro, G. Szabo, W. L. Wilson, C. Sengupta, “Enhanced Microlithography Using Combined Phase Shifting and Off-Axis Illumination.” Jap. J. Appl. Physics 34: L1629-L1631 (1995)

1993

[9] U. Simon, F. K. Tittel, L. Goldberg, “Difference Frequency Mixing in AgGaS2 by Using a High Power GaAlAs tapered Semiconductor Amplifier at 860 nm.” Optics Letters 18: 1931-1933 (1993)

[8] U. Simon, C. E. Miller, C. C. Bradley, R. G. Hulet, R. F. Curl, F. K. Tittel, “Difference Frequency Generation in AgGaS 2 Using Single-Mode Diode Laser Pump Sources.” Optics Letters 18: 1062-1064 (1993)

[7] U. Simon, Z. Benko, M. W. Sigrist, R. F. Curl, F. K. Tittel, “Design Considerations of an Infrared Spectrometer Based on Difference Frequency Generation in AgGaSe2.” Applied Optics 32: 6650-6655 (1993)

1992

[6] A. H. Hielscher, C. E. Miller, D. C. Bayard, K. P. Smolka, R. F. Curl, F. K. Tittel, “Optimization of a Mid-Infrared High Resolution Difference Frequency Laser Spectrometer.” J. Opt. Soc. Am. B 9: 1962-1967 (1992)

1988

[5] S. Kubodera, P.J. K. Wisoff, F. K. Tittel, R. Sauerbrey, “ Coupling of High Power UV Laser Radiation into Fused Silica Fibers Using Pressurized Gases”, Appl. Optics 27, 1638-1640 [PDF]

[4 ]G.H. Pettit, R. Pini, F.K. Tittel, R. Sauerbrey, M. P. Sartori, P.D. Henry, “Excimer laser induced autofluorescence from arteriosclerotic human arteries,” Submitted to IEEE J. of Quantum Electron [PDF]

[3] M. Sartori, D. Weilbaecher, P.D. Henry, G. L. Valderrama, S. Kubodera, R. C. Chin, M.J. Berry, F. K. Tittel, R. Sauerbrey, “ Laser Induced Autofluorescenece of Human Arteries”, Circulation Research, 63, 1053-1059 [PDF]

1987

[2] M. Sartori, R. Sauerbrey, S. Kubodera, F.K. Tittel, R. Roberts, P.D. Henry, “Autofluorescence Maps of Atherosclerotic Human Arteries- A New Technique in Medical Imaging”, IEEE J. of Quantum Electronics, QE-23, 1794-1997 [PDF]

[1 ]M. Sartori, P.D. Henry, R. Sauerbrey, F.K. Tittel, D. Weilaucher, R. Roberts, “Tissue interactions and measurement of ablation rates with ultraviolet and visible lasers in canine and human arteries.” , Lasers in Surgery and Medicine”, 7: p 300-306 (1987)

1986

[1] Liu, S.C. O’Brien, Q. Zhang, J.R. Heath, F.K. Tittel, R.F. Curl, H.W. Kroto, R.E. Smalley, “Negative carbon cluster ion beams: New evidence for the special nature of C60”, Chemical Physics Letters, 126, 2, 2, 215–217 (1986) [PDF]