利用45°倾斜光纤光栅（45°-TFG）作为光纤型起偏器，搭建了一台高可靠性高稳定性的掺铒锁模光纤激光器，并以此为基础实现了重复频率frep和载波包络偏移频率fceo的精确锁定。当泵浦功率为228 mW时，基于45°-TFG的锁模激光振荡器可实现3 dB光谱带宽为60.4 nm、脉冲宽度为68 fs的超短脉冲输出，在12 h内功率的均方根稳定性达到0.033%，且在较大的泵浦范围内均能维持较好的展宽锁模状态。经过自主搭建的非线性脉冲放大、超连续谱产生以及f-2f自参考拍频干涉光路，获得了信噪比为32 dB的fceo信号。最后通过搭建基于锁相环的主动反馈控制电路，将frep和fceo信号溯源至一台GPS时频系统，最终测得frep和fceo信号归一化后在1 s门时间内频率稳定度为2.38×10^-12和6.41×10^-16。这是首次实现基于45°-TFG的光纤激光频率梳，表明了基于45°-TFG的锁模光纤激光器在实际应用中的潜力。

A highly reliable and stable erbium-doped mode-locked fiber laser was constructed using a 45°-tilted fiber grating (45°-TFG) as a fiber polarizer. Based on this, precise signal stabilization of the repetition frequency frep and carrier-envelope offset frequency fceo was achieved. When the pump power is 228 mW, the mode-locked laser oscillator based on a 45°-TFG can achieve an ultra-short pulse output of 3 dB with a spectral bandwidth of 60.4 nm and a pulse width of 68 fs. The root mean square stability of the power reaches 0.033% within 12 hours, and it can maintain a good stretched mode-locked state over a large pump range. After self-built chirped pulse amplification, super-continuum spectrum generation, and f-2f self-reference beat interference optical path, fceo signal with a signal-to-noise ratio of 32 dB was obtained. Finally, by building an active feedback control circuit based on a phase-locked loop, the frep and fceo signals were traced back to a GPS time-frequency system, and the frequency instability of the frep and fceo signals was measured to be 2.38×10^-12 and 6.41×10^-16 within an average time of 1 second. This is the first implementation of a fiber laser frequency comb based on a 45°-TFG, indicating the potential of a 45°-TFG based mode-locked fiber laser in practical applications.