This study details the implementation of a wavelength-tunable ultra-stable optical frequency comb (OFC), which is generated by a passively mode-locked all-polarization-maintaining Erbium (Er)-doped fiber laser based on a non-linear amplifying loop mirror. The center wavelength can be tuned from 950 to 1,080 nm and from 1,650 to 2,080 nm by adjusting the pump's power. Standard deviations of 100 μHz (τ = 1 s) for repetition rate and 330 μHz (τ = 1 s) for carrier-envelop offset frequency were measured in 15 h. The corresponding Allan deviations were 2.4 × 10⁻¹⁷ and 8.2 × 10⁻¹⁷ at 1 s. The repetition rate and carrier-envelop offset frequency of OFC were counted by a ∏-type counter from K+K Messtechnik.

这项研究详细介绍了波长可调超稳定光学频率梳（OFC）的实现，该波长梳是由基于非线性放大回路的无源锁模全偏振保持Er（Er）掺杂光纤激光器产生的镜子。通过调节泵浦功率，可以将中心波长从950 nm调至1,080 nm，从1,650 nm调至2,080 nm。在15小时内测得重复率的标准偏差为100μHz（τ= 1 s），而载波包络偏移频率的标准偏差为330μHz（τ= 1 s）。1 s时相应的艾伦偏差为2.4×10 ^-17和8.2×10 ^-17。用K + K Messtechnik公司的∏型计数器对OFC的重复率和载波包络偏移频率进行计数。