We demonstrate a dual-wavelength, compact femtosecond optical parametric oscillator (OPO) with high-repetition-rate, which is harmonically pumped by a ~101 MHz Yb-doped fiber laser system. The dual-wavelength output is realized by exploiting the bidirectional off-axis pumping technique, and the multiplication of repetition rate is derived by placing a nonlinear crystal in a miniaturized V-type cavity with only 16.5 cm length. By adjusting the detuning degree of the pump at one end, the maximum dual-wavelength gap is 66 nm from 1497 to 1563 nm. The time interval between the dual wavelengths can be adjusted freely. This is the first report on a dual-wavelength with the high-repetition-rate of GHz-level, femtosecond OPO system.

中文翻译：

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双波长、高重复率、紧凑型飞秒光学参量振荡器

我们展示了一种双波长、紧凑型飞秒光学参量振荡器 (OPO)，具有高重复率，由 ~101 MHz 掺镱光纤激光器系统谐波泵浦。双波长输出是利用双向离轴泵浦技术实现的，重复率的倍增是通过将非线性晶体放置在一个只有16.5厘米长的微型V型腔中得到的。通过调节一端泵浦的失谐度，从1497到1563nm的最大双波长间隙为66nm。双波长之间的时间间隔可以自由调整。这是第一篇关于双波长高重复频率的GHz级飞秒OPO系统的报告。