[1] [1] Buckingham A D, Stephens P J. Magnetic optical activity, Ann. Rev. Phys. Chem., 1966, 17:399～432

[2] [2] Litfin G, Pollock C R, Curl Jr. R F et al.. Sensitivity enhancement of laser absorption spectroscopy by magnetic rotation effect. J. Chem. Phys., 1980, 72(12):6602～6605

[3] [3] Hugo Wahlqhisl. Modulation broadening of unsaturated Lorentzian lines. J. Chem. Phys., 1961, 35(5):1708～1710

[4] [4] Smith R L. Practical solutions of the Lock-in detection problem for Lorentz and dispersion resonance signals. J. Opt. Soc. Am., 1971, 61(8):1015～1022

[5] [5] Bjorklund G C. Frequency-modulation spectroscopy: A new method for measuring weak absorptions and dispersions. Opt. Lett., 1980, 5(1):15～17

[6] [6] Bjorklund G C, Levenson M D. Sub-Doppler frequency-modulation spectroscopy of I2. Phys. Rev. (A), 1981, 24(1):166～169

[7] [7] Hall J L, Hollberg L, Baer T et al.. Optical heterodyne saturation spectroscopy. Appl. Phys. Lett., 1981, 39(9):680～682

[8] [8] Argawal G S. Frequency-modulated spectra of coherently driven systems. Phys. Rev. (A), 1981, 23(3):1375～1381

[9] [9] Schenzle A, Devoe R G, Rewer R G. Phase-modulation laser spectroscopy. Phys. Rev. (A), 1982, 25(5):2606～2621

[10] [10] Bjorklund G C, Levenson M D, Lenth W et al.. Frequency modulation (FM) spectroscopy: Theory of lineshapes and signal-to-noise anslysis. Appl. Phys. (B), 1983, 32(1):145～152

[11] [11] North S W, Zheng X S, Fei Rui et al.. Line shape analysis of Doppler broadened frequency -modulated spectra. J. Chem. Phys., 1996, 104(6):2129～2135

[12] [12] MeCarthy M C, Block J C, Field R W. Frequency-modulation enhanced magnetic rotation spectroscopy: A sensitive and selective absorption scheme for paramagnetic molecules. J. Chem. Phys., 1994, 100(9):6331～6346