Yin Taoce, Qi Zhangni, Chen Feihong, Song Yufu, He Sailing
Opt Express. 2020 Mar 2;28(5):7175-7181. doi: 10.1364/OE.388216.
A high peak-power and narrow-linewidth all-fiber Raman pulsed laser operating around 1.65 µm is introduced. A 1541 nm laser seed is modulated into pulse trains, which will be used as the Raman pump laser, by driving a reflective semiconductor optical amplifier (RSOA) with a continuous periodic square-wave voltage. A homemade high peak-power 1541 nm pulsed laser is employed to modulate and amplify a 1653.7 nm distributed feedback laser (DFB) seed synchronously in a segment of the 52-meter-long highly germania-doped fiber (HGDF). The repetition-rate and the pulse-width of the 1653.7 nm pulsed laser are 100 kHz and 31 ns, respectively. The peak power is estimated to be as high as about 30.85 W, and a 3-dB linewidth as narrow as less than 0.08 nm is achieved when the average power of 1541 nm pump is 3.1 W. The wavelength of Raman pulsed laser can be tuned from 1652.0 nm to 1654.0 nm continuously with an optical signal-to-noise ratio (OSNR) of more than 35 dB.
介绍了一种工作在1.65μm附近的高峰值功率、窄线宽全光纤拉曼脉冲激光器。通过用连续周期性方波电压驱动反射半导体光放大器（RSOA），将1541nm激光种子调制成脉冲串，用作拉曼泵浦激光器。采用自制的高峰值功率1541nm脉冲激光器，在一段52米长的高锗掺杂光纤（HGDF）中对1653.7nm分布反馈激光器（DFB）种子进行同步调制和放大。1653.7nm脉冲激光器的重复频率和脉冲宽度分别为100kHz和31ns。当1541nm泵浦光的平均功率为3.1W时，估计峰值功率高达约30.85W，实现了窄至小于0.08nm的3dB线宽。拉曼脉冲激光器的波长可在1652.0nm至1654.0nm之间连续调谐，光信噪比（OSNR）大于35dB。
