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报道了利用半导体激光器(LD)端面抽运的钒酸钇(Nd∶YVO4)激光器作为抽运源,多周期周期极化铌酸锂(PPLN)为非线性晶体的连续波内腔光学参量振荡器(OPO)及基于此的连续波可调谐橙红光光源。为实现OPO的连续波运转,采用了内腔抽运方式,并对谐振腔进行了合理设计。实验得到调谐范围1406~1513 nm的信号光及3.66~4.1μm的中红外闲频光连续波输出,在10.9 W的LD功率下,最大输出功率分别为输出波长1500 nm处的820 mW和3.86μm处的195 mW,相对LD功率的转换效率分别为7.5%和1.8%。利用BaB2O4(BBO)晶体对OPO的1064 nm抽运光和1.4~1.5μm信号光进行内腔和频,获得了调谐范围606~624 nm的橙红波段连续波输出,最大输出功率为624 nm处的120 mW,转换效率为1.1%。
The continuous wave cavity optical parametric oscillator with multi-period periodic polarization lithium niobate (PPLN) as nonlinear crystal is reported, which uses the yttrium vanadate (Nd: YVO4) laser pumped by the end face of semiconductor laser as pumping source. (OPO) and the continuous wave tunable orange-red light source based on this. In order to realize continuous wave operation of OPO, a cavity pumping mode is adopted, and a reasonable design of the resonant cavity is carried out. The experimental results show that the maximum output power of the signal light with the tuning range of 1406 ~ 1513 nm and the mid-infrared idler CW light with the wavelength of 3.66 ~ 4.1μm are 820 mW at the output wavelength of 1500 nm and 3.86 μm at the LD power of 10.9 W, respectively At 195 mW, the relative LD power conversion efficiencies were 7.5% and 1.8%, respectively. The cavity and frequency of 1064 nm pump light and 1.4 ~ 1.5 μm signal light of OPO were obtained by using BaB2O4 (BBO) crystals. The CW output of orange-red band with tuning range from 606 to 624 nm was obtained. The maximum output power was 624 nm 120 mW, conversion efficiency of 1.1%.