[1] Van Herpen M M J W, Ngai A K Y, Bisson S E, et al. Optical parametric oscillator-based photoacoustic detection of CO2 at 4.23 mu m allows real-time monitoring of the respiration of small insects [J]. Applied Physics B-Lasers and Optics, 2006, 82(4): 665-669.
[2] Cristescu S M, Persijn S T, Hekkert S T L, et al. Laser-based systems for trace gas detection in life sciences [J]. Applied Physics B-Lasers and Optics, 2008, 92(3): 343-349.
[3] Kovalchuk E V, Dekorsy D, Lvovsky A I, et al. High-resolution Doppler-free molecular spectroscopy with a continuous-wave optical parametric oscillator [J]. Optics Letters, 2001, 26(18): 1430-1432.
[4] Asvany O, Hugo E, Muller F, et al. Overtone spectroscopy of H(2)D(+) and D(2)H(+) using laser induced reactions [J]. Journal of Chemical Physics, 2007, 127(15).
[5] Martini R, Bethea C, Capasso F, et al. Free-space optical transmission of multimedia satellite data streams using mid-infrared quantum cascade lasers [J]. Electronics Letters, 2002, 38(4): 181-183.
[6] Yang S, Eckardt R, Byer R. Continuous-wave singly resonant optical parametric oscillator pumped by a single-frequency resonantly doubled Nd: YAG laser [J]. Optics letters, 1993, 18(12): 971-973.
[7] Yang S, Eckardt R, Byer R. 1.9-W cw ring-cavity KTP singly resonant optical parametric oscillator [J]. Optics letters, 1994, 19(7): 475-477.
[8] Bosenberg W R, Myers L E, Byer R L, et al. 93% pump depletion, 3.5-W continuous-wave, singly resonant optical parametric oscillator [J]. Optics letters, 1996, 21(17): 1336-1338.
[9] Gross P, Klein M E, Walde T, et al. Fiber-laser-pumped continuous-wave singly resonant optical parametric oscillator [J]. Opt Lett, 2002, 27(6): 418-420.
[10] Henderson A, Stafford R. Spectral broadening and stimulated Raman conversion in a continuous-wave optical parametric oscillator [J]. Optics Letters, 2007, 32(10): 1281-1283.
[11] Kiessling J, Sowade R, Breunig I, et al. Cascaded optical parametric oscillations generating tunable terahertz waves in periodically poled lithium niobate crystals [J]. Optics Express, 2009, 17(1): 87-91.
[12] Vainio M, Peltola J, Persijn S, et al. Singly resonant cw OPO with simple wavelength tuning [J]. Optics Express, 2008, 16(15): 11141-11146.
[13] Harris S. Tunable optical parametric oscillators [J]. Proceedings of the IEEE, 1969, 57(12): 2096-2113.
[14] Boyd G D, Kleinman D A. Parametric interaction of focused Gaussian light beams [J]. Journal of Applied Physics, 1968, 39(8): 3597-3639.
[15] Guha S, Fei-Jain W, Falk J. The effects of focusing on parametric oscillation [J]. Quantum Electronics, IEEE Journal of, 1982, 18(5): 907-912.
[16] Chen D-W, Rose T S. Conference on Lasers and Electro-Optics, 2005:CThQ2.
[17] Vainio M, Peltola J, Persijn S, et al. Thermal effects in singly resonant continuous-wave optical parametric oscillators [J]. Applied Physics B-Lasers and Optics, 2009, 94(3): 411-427.
[18] Vainio M, Ozanam C, Ulvila V, et al. Tuning and stability of a singly resonant continuous-wave optical parametric oscillator close to degeneracy [J]. Optics Express, 2011, 19(23): 22515-22527.