High-repetition-rate optical frequency combs are useful for precision spectroscopy because of their high power per comb mode, but conventional high-repetition-rate lasers do not have a broad enough spectrum. In this study, a fully stabilized polarization-maintaining figure-9 mode-locked fiber laser with a high repetition rate of 206 MHz and a broad spectrum was demonstrated by employing simultaneous control of cavity dispersion and length. The laser exhibited a 3 dB spectral bandwidth of 88 nm and a compressed pulse width of 66 fs. Additionally, f_CEO and f_rep phase locking were implemented, resulting in low (0.21 rad) in-loop carrier-envelope-offset frequency phase noise. To the best of our knowledge, this is the widest spectrum bandwidth and shortest pulse duration directly obtained from an all-PM figure-9 fiber laser oscillator to date. The combination of high repetition rate and broad spectral range makes this system very useful for a wide range of applications, especially in the field of precision spectroscopy.

高重复率光学频率梳由于每个梳模式的功率较高，因此可用于精密光谱，但传统的高重复率激光器没有足够宽的光谱。在这项研究中，通过同时控制腔体色散和长度，展示了一种完全稳定的保偏 9 字锁模光纤激光器，具有 206 MHz 的高重复率和宽光谱。该激光器具有 88 nm 的 3 dB 光谱带宽和 66 fs 的压缩脉冲宽度。此外，_还实施了fCEO和frep锁相，从而实现低（0.21rad _）环内载波包络偏移频率相位噪声。据我们所知，这是迄今为止直接从全保偏 9 字形光纤激光振荡器获得的最宽光谱带宽和最短脉冲持续时间。高重复率和宽光谱范围的结合使得该系统在广泛的应用中非常有用，特别是在精密光谱领域。