[1] WERLE P, SLEMR F, MAURER K, et al. Nearand midinfrared laseroptical sensors for gas analysis［J］. Optics and Lasers in Engineering, 2002, 37(23): 101114.

[2] FRIED A, HENRY B, WERT B, et al. Laboratory, groundbased, and airborne tunable diode laser systems: performance characteristics and applications in atmospheric studies［J］. Applied Physics B, 1998, 67(3): 317330.

[3] GMACHL C, STRAUB A, COLOMBELLI R, et al. Singlemode, tunable distributedfeedback and multiple wavelength quantum cascade lasers［J］. IEEE Quantum Electron, 2002, 38(6): 569581.

[4] BAKHIRKIN Y A, KOSTEREV A A, CURL R F, et al. Subppbv nitric oxide concentration measurements using cw roomtemperature quantum cascade laser based integrated cavity spectroscopy［J］. Applied Physics B, 2006, 82(1): 149154.

[5] ARMIN L. Quantum cascade lasers, systems, and applications in Europe［C］. SPIE, 2005, 5732: 122133.

[6] WEIDMANN D, KOSTEREV A A, ROLLER C, et al. Monitoring of ethylene by a pulsed quantum cascade laser［J］. Applied Optics, 2004, 43(16): 33293334.

[7] CORNELIA F, MARKUS W S. MidIR difference frequency generation［J］. Topics Applied Physics, 2003, 89: 97143.

[8] RICHTER D, FRIED A, WERT B P, et al. Development of a tunable midIR difference frequency laser source for highly sensitive airborne trace gas detection［J］. Applied Physics B, 2002, 75(23): 281288.

[9] GOLDBERG L, KOPLOW J, LANCASYER D G, et al. Midinfrared differencefrequency generation source pumped by a 1.1~1.5 μm dualwavelength fiber amplifier for tracegas detection［J］. Optics Letters, 1998, 23(19): 1517.

[10] JUNDT D. Temperaturedependent sellmeier equation for the index of refraction, ne, in congruent lithium niobate［J］. Optics Letters, 1997, 22(20): 15531555.

[11] D′AMATO F, MAZZING P, CASTAGNOLI F. Methane analyzer based on TDL′s for measurements in the lower stratosphere: design and laboratory tests［J］. Applied Physics B, 2002, 75(23): 195202.

[12] ROTHMAN L S, RINSLAND C P, GOLDMAN A, et al. The HITRAN molecular spectroscopic database and HAWKS (HITRAN atmospheric workstation: 1996 edition)［J］. Journal of Quantitative Spectroscopy and Radiative Transfer, 1998, 60(14): 665710.

[13] 陈东，刘文清，张玉钧.PPLN晶体差频中红外激光系统调谐特性研究［J］.光学学报, 2009, 29(3):761766.

    CHEN Dong, LIU Wenqing, ZHANG Yujun. Study on the tuning characteristic of PPLN based difference frequency generation laser system［J］. Acta Optica Sinica, 2009, 29(3): 761766.

[14] ADY A, KEREN F K, YONATAN S. Frequency conversion in novel materials and its application to high resolution gas sensing［J］. Optics and Lasers in Engineering, 2002, 37(23): 159170.