[1] [1] G. Stewart, K. Atherton, H. B. Yu et al.. An investigation of an optical fibre amplifier loop for intra-cavity and ring-down cavity loss measurements［J］. Meas. Sci. Technol., 2001, 12(7): 843～849

[2] [2] J. Marshall, G. Stewart, G. Whitenett. Design of a tunable L-band multi-wavelength laser system for application to gas spectroscopy［J］. Meas. Sci. Technol., 2006, 17(5): 1023～1031

[3] [3] M. Zhang, D. N. Wang, W. Jin et al.. Wavelength modulation technique for intra-cavity absorption gas sensor［J］. IEEE Trans. Instrum. Meas., 2004, 53(1): 136～139

[4] [4] Li Changzhi. Infrared Fourier transform spectroscopy and its application in analytical chemistry［J］. Chinese J. Analytical Chemistry, 1981, 9(1): 112～117

[5] [5] K. Chan, H. Ito, H. Inaba. Remote sensing system for near-infrared differential absorption of CH4 gas using low-loss optical fiber link［J］. Appl. Opt., 1984, 23(19): 3415～3420

[6] [6] K. Uehara, H. Tai. Remote detection of methane using a diode laser［J］. Appl. Opt., 1992, 31(6): 809～814

[7] [7] W. Jin, G. Stewart, B. Culshaw. Absorption measurement of methane gas with a broadband light source and interferometric signal processing［J］. Opt. Lett., 1993, 18(16): 1364～1366

[8] [8] P. B. David, S. Z. Daniel, P. D. Arthur. High-resolution spectroscopy using an acousto-optic tunable filter and a fiber-optic Fabry-Perot interferometer［J］. Appl. Spectrosc., 1996, 50(4): 498～503

[9] [9] Y. Zhang, M. Zhang, W. Jin. Multi-point, fiber-optic gas detection with intra-cavity spectroscopy［J］. Opt. Commun., 2003, 220(4-6): 361～364

[10] [10] Jia Dagong, Liu Kun, Jing Wencai et al.. Method of gas detection based on intra-cavity erbium-doped fiber laser［J］. Chinese J. Lasers, 2009, 36(9): 2384～2387

[11] [11] V. M. Baev, T. Latz, P. E. Toschek. Laser intracavity absorption spectroscopy［J］. Appl. Phys. B: Laser Optics, 1999, 69(3): 171～202

[12] [12] Liu Kun, Liu Tiegen, Jiang Junfeng et al.. Research of hybrid fiber physical and chemical sensing system［J］. Chinese J. Lasers, 2009, 36(S2): 299～305

[13] [13] K. Liu, W. C. Jing, G. D. Peng et al.. Wavelength sweep of intracavity fiber laser for low concentration gas detection［J］. IEEE Photon. Technol. Lett., 2008, 20(18): 1515～1517

[14] [14] Yongtao Wang, Haiwen Cai, Jianxin Geng et al.. Behaviors of harmonic signals in wavelength-modulated spectroscopy under high absorption strength［J］. Chin. Opt. Lett., 2007, 5(9): 552～555

[15] [15] K. Liu, W. C. Jing, G. D. Peng et al.. Investigation of PZT driven tunable optical filter nonlinearity using FBG optical fiber sensing system［J］. Opt. Commun., 2008, 281(12): 3286～3290

[16] [16] R. Arndt. Analytical line shapes for Lorenzian signals broadened by modulation［J］. J. Appl. Phys., 1965, 36(8): 2522～2524

[17] [17] J. Reid, D. Labrie. Second harmonic detection with tunable diode lasers-comparison of experiment and theory［J］. Appl. Phys. B: Lasers Optics, 1981, 26(3): 203～210

[18] [18] Jing Wencai, Wang Guanghui, Liu Kun et al.. Application of weighted wavelength algorithm on the demodulation of a fiber Bragg grating optical sensing system［J］. J. Optoelectronics·Laser, 2007, 18(9): 1022～1025

[19] [19] Liang Xiao, Liu Tiegen, Liu Kun et al.. Method of real-time calibration for tunable optical filter nonlinearity［J］. Chinese J. Lasers, 2010, 37(6): 1445～1449