Nakajima Yoshiaki, Hata Yuya, Minoshima Kaoru
Opt Express. 2019 May 13;27(10):14648-14656. doi: 10.1364/OE.27.014648.
We developed an all-polarization-maintaining, polarization-multiplexed, dual-comb fiber laser with a nonlinear amplifying loop mirror (NALM) mode-locking mechanism. Owing to the use of the slow and fast axes of a polarization-maintaining fiber (PMF), the dual-frequency combs with slightly different repetition rates from the single-laser cavity are generated at the same center wavelength without extra-cavity nonlinear spectral broadening. The narrow relative beat note between the two frequency combs is obtained with a full-width-at-half-maximum of ~1 kHz in the optical frequency domain. The two frequency combs have high relative stability and mutual coherence owing to passive common-mode noise cancellation.
我们开发了一种采用非线性放大环镜（NALM）锁模机制的全保偏、偏振复用双梳状光纤激光器。由于使用了保偏光纤（PMF）的慢轴和快轴，在同一中心波长处产生了来自单激光腔且重复率略有不同的双频梳，无需腔外非线性光谱展宽。在光频域中，两个频率梳之间获得了半高全宽约为1 kHz的窄相对拍频。由于被动共模噪声消除，这两个频率梳具有高相对稳定性和相互相干性。
