Gu Chenglin, Hu Minglie, Fan Jintao, Song Youjian, Liu Bowen, Wang Chingyue
Opt Lett. 2014 Jul 1;39(13):3896-9. doi: 10.1364/OL.39.003896.
We reported a dual-wavelength femtosecond optical parametric oscillator (OPO) based on a temperature-tuned LiB₃O₅ crystal. The OPO was synchronously pumped by a frequency-doubled, mode-locked Yb-fiber laser amplifier, providing a 520 nm pump laser with durations of 250 fs at a repetition rate of 57 MHz. High efficiency and dual-wavelength operation are obtained over the ranges of 658-846 nm and 2.45-1.35 μm. The observed dual-wavelength tuning is in agreement with the values predicted by numerical simulation. Moreover, a sum-frequency yellow laser of the longer signal and idler tunable from 555 to 623 nm with practical power is achieved. With an 8% output coupler, the maximum signal output power is 390 mW pumped at 3 W with dual-wavelength operation, while the maximum power of sum-frequency generation is 110 mW at 590 nm.
我们报道了一种基于温度调谐LiB₃O₅晶体的双波长飞秒光学参量振荡器（OPO）。该OPO由倍频、锁模Yb光纤激光放大器同步泵浦，以57 MHz的重复频率提供持续时间为250 fs的520 nm泵浦激光。在658 - 846 nm和2.45 - 1.35μm范围内实现了高效率和双波长运转。观察到的双波长调谐与数值模拟预测的值一致。此外，还获得了实际功率下波长在555至623 nm可调谐的较长信号光和闲频光的和频黄色激光。使用8%的输出耦合器，在双波长运转且泵浦功率为3 W时，最大信号输出功率为390 mW，而在590 nm处和频产生的最大功率为110 mW。
