[1] [1] Chu Z, Singh U N, Wilkerson T D. A self-seeded SRS system for the generation of 1.54 μm eye-safe radiation. Opt. Commun., 1990, 75(2):173～177

[2] [2] Stoneman R C, Esterowitz L. Laser-pumped room-temperature 1.50 μm CW Tm3+:YLF lasers, In:Advanced Solid-State Lasers,OSA Proc.Series,Vol.7 Washington,D.C.,Optical Society of America,1990,176～178

[5] [5] Bosenberg W R, Guyer D R. Broadly tunable, singly-frequency optical parametric frequency-conversion system. J. Opt. Soc. Am. (B), 1993, 10(9):1716～1722

[6] [6] Marshall L R, Kaz A. Eye-safe output from noncritically phase-matched parametric oscillators. J. Opt. Soc. Am. (B), 1993, 10(9):1730～1736

[7] [7] Kato K. Second harmonic and sum-frequency generation to 4950 and 458.9 nmin KTP.IEEE J.Quant.Electron.,1988,QE-24(1):3～4

[8] [8] Brosnan S J, Byer R L. Optical parametric oscillator threshold and linewidth studies. IEEE J. Quant. Electron., 1979, 15(6):415～431

[9] [9] Marshall L R, Kaz A, Aytur O. Multimode pumping of optical parametric oscillators. IEEE J. Quant. Electron., 1996, 32(2):177～182