飞秒光学频率梳是当今激光技术领域的重要研究方向。实验基于非线性放大环形镜 (NALM)锁模激光器实现了全保偏光纤结构的掺铒光学频率梳。在基于 NALM锁模的光纤激光器内部加入非互惠相移器，降低了锁模阈值，实现了超短脉冲激光器的自启动。经过脉冲放大和压缩，脉冲的峰值功率可达 61.3 kW。将此高功率超短脉冲注入 55 cm的保偏高非线性光纤 (PM-HNLF)中，激光器的输出光谱被拓展至一个倍频层 (1 030～2 200 nm)。辅以 f-2f自参考探测技术，成功探测到了信噪比高达 40 dB、线宽为 40 kHz的载波包络偏频信号 (f0)。此外，通过使用两套电路反馈系统，将 f0信号与激光器重复频率信号 (fr)的频率抖动量分别降低至 521.71 mHz和 240 μHz，实现了相位稳定的掺铒光学频率梳。

Femtosecond optical frequency comb has been a rich research field in laser optics. We demonstrated an all polarization-maintaining (PM) fiber, Erbium-doped frequency comb based on a nonlinear amplification loop mirror(NALM) mode-locked fiber laser. An integrated nonreciprocal phase shifter was employed in a passively mode-locked NALM-based oscillator to reduce the mode locking threshold and facilitate self-starting. Being amplified and pulse compressed, the peak power of the pulses can achieve as high as 61.3 kW. Injecting the high-power ultrashort pulses into a 55-cm-long PM high nonlinear fiber (HNLF), an octave-spanning supercontinuum from 1 030 nm to 2 200 nm was generated. By using a collinear f-2f interferometer, the carrier-envelop offset signal (f0) with 40-dB signal-to-noise ratio (SNR) and 40-kHz linewidth was detected. Moreover, with the employment of two feedback locking electronics, the f0 signal and the repetition rate of the laser (fr) were phase-locked and it showed the standard deviations of 521.71 mHz and 240 μHz, respectively.