[1] [1] Capasso F, Sivco D L, Sirtori C, et al. Science, 1994, 264(5158): 553.

[2] [2] Bai Y, Slivken S, Darvish S R, et al. Proceedings of SPIE, 2010, 7608: 76080F-76080F-8.

[3] [3] Lou P Q, Hoffman A J, Escarra M D, et al. Nature Photonics, 2010, 4: 95.

[4] [4] Yu J S, Evans A, Slivken S, et al. IEEE Photonics Technology Letters, 2005, 17(6): 1154.

[5] [5] Grouiez B, Parvitte B, Joly L, et al. Applied Physics B, 2007, 90(2): 177.

[6] [6] Mcculloch M T. Pulsed Quantum Cascade Lasers for Intra-Pulse Spectroscopy of Pollutants Such as Tobacco Bye-Products［C］. Lasers and Electro-Optics, 2 pp. vol.1, Decemeber 2004. (CLEO). Conference on, Baltimore, Maryland, USA.

[7] [7] Wysocki G, Mccurdy M, Stephen S, et al. Applied Optics, 2004, 43(32): 6040.

[8] [8] Manne J, Jager W, Tulip J. Applied Physics B, 2009, 94(2): 337.

[9] [9] Brandstetter M, Genner A, Anic K, et al. Analyst, 2010, 135(12): 3260.

[10] [10] Hinkov B, Fuchs F, Yang Q K, et al. Applied Physics B, 2010, 100(2): 253.

[11] [11] Kasyutich V L, Raja R K, Martin P A. Infrared Physics & Technology, 2010, 53(5): 381.

[12] [12] Karpf A, Rao G N. Applied Optics, 2009, 48(2): 408.

[13] [13] Hancock G, Van Helden J H, Peverall R, et al. Applied Physics Letters, 2009, 94(20): 201110.

[14] [14] Chen G, Martini R, Park S, et al. Applied Physics Letters, 2010, 97: 011102.

[15] [15] Nagele M, Hofstetter D, Faist J, et al. Analytical Sciences, 2001, 17: s497.

[16] [16] Kosterev A A, Bakhirkin Y A, Curl R F, et al. Optics Letters, 2002, 27(21): 1902.

[17] [17] Kosterev A A, Tittel F K, Serebryakov D, et al. Review of Scientific Instruments, 2005, 76(4): 043105.

[18] [18] Holthoff E L, Heaps D A, Pellegrino P M. IEEE Sensors Journal, 2010, 10(3): 572.

[19] [19] Demtoder W. Laser Spectroscopy Basic Concepts and Instrumentation, 3rd Edition, Springer, New York, 2003.

[20] [20] Litfin G, Pollock C R, Curl R F, et al. Journal of Chemical Physics, 1980, 72(12): 6602.

[21] [21] Ganser H, Urban W, Brrown J. Molecular Physics, 2003,101(4): 545.

[22] [22] Ganser H, Horstjann M, Suschek C, et al. Applied Physics B, 2004, 78(3-4): 513.

[23] [23] Fritsch T, Horstjann M, Halmer D, et al. Applied Physics B, 2008, 93(2-3): 713.

[24] [24] Sabana H, Fritsch T, Onana M B, et al. Applied Physics B, 2009, 96(2-3): 535.

[25] [25] Lewicki R, Doty J H, Curl R F, et al. Proc. Natl. Acad. Sci., 2009, 106(31): 12587.

[26] [26] Zaugg C A, Lewicki R, Day T, et al. Proceedings of SPIE, 2011, 7945: 79450O-79450O-7.

[27] [27] Kosterev A A, Roller C, Tittel F K. Sensors Proceedings of IEEE, 2003, 1: 673.

[28] [28] Rawlins W T, Hensley J M, Sonnenfroh D M, et al. Applied Optics, 2005, 44(31): 6635.

[29] [29] Wehe S, Allen M, Xiang L, et al. Sensors Proceedings of IEEE, 2003, 2: 795.

[30] [30] Weidmann D, Kosterev A A, Roller C, et al. Applied Optics, 2004, 43(16): 3329.

[31] [31] Montajir R. Development of an Ultra-Low Concentration N2O Analyzer Using Quantum Cascade laser［C］, SAE 2010 World Congress & Exhibition, Paper Number: 2010-01-1291.

[32] [32] Bakhirkin Y A, Kosterev A A, Roller C, et al. Applied Optics, 2004, 43(11): 2257.

[33] [33] Weidmann D, Tsai T, Macleod N A, et al. Optics Letters, 2011, 36(11): 1951.

[34] [34] Degreif K, Rademacher S, Asheva P D, et al. Proceedings of SPIE, 2011, 7945: 79450P.

[35] [35] Hildenbrand J, Herbst J, Wollenstein J, et al. Proc of SPIE, 2009, 7222: 72220B-1.

[36] [36] Furstenberg R, Papantonakis M, Kendziora C A, et al. Proceedings of SPIE, 2010, 7665: 76650Q.

[37] [37] Ma J, Cheesman A, Ashfold M N R, et al. Journal of Applied Physics, 2009, 106(3): 033305.

[38] [38] Wang W, So S, Xie F, et al. Compact Quantum Cascade Laser Based Atmospheric CO2 Sensor［C］, CLEO: Science and Innovations, Baltimore, Maryland, USA, May 1, 2011, Page JMC5.

[39] [39] Van Neste C W, Senesac L R, Thundat T. Applied Physics Letters, 2008, 92(23): 234102.

[40] [40] Mcmanus J B, Zahniser M S, Nelson D D, et al. Optical Engineering, 2010, 49(11): 111124.

[41] [41] Kosterev A A, Tittel F K. Trace HCN Quantification Using Quartz Enhanced Photoacoustic Spectroscopy, CLEO (CLEO), Long Beach, California, May 21, 2006, Laser-Based Sensing Applications (CFD), Page CFD2.

[42] [42] Liu W, Wang L, Li L, et al. Applied Physics B, 2010, 103(3): 743.

[43] [43] Krtz P, Stupar D, Krieg J, et al. Applied Physics B, 2008, 90(2): 187.

[44] [44] Nwaboh J A, Werhahn O, Schiiel D. Applied Physics B, 2011, 130(4): 947.

[45] [45] Northern J H, Ritchie G A, Smaknan E P, et al. Optics Letters, 2010, 35(16): 2750.