Dual-comb spectroscopy (DCS) is a promising approach for real time, high precision, and high sensitivity Fourier-transform spectroscopy. DCS requires a pair of tightly phase-locked optical frequency combs (OFCs). The intrinsic complexity hinders practical application of this technique. Recently, there is a new trend of generating a pair of OFCs with slightly different repetition rate from a single laser cavity, known as dual-comb lasers. Shared laser cavity cancels common-mode technical noises passively and mutual coherence between the OFCs is well maintained. Given that the cumbersome phase locking systems are avoided, dual-comb lasers provide an attractive alternative to a pair of independent OFCs. In this review paper, we summarize the latest laser cavity multiplexing schemes that allow dual-comb generation in solid state lasers, fiber lasers as well as in on-chip waveguide lasers. Their noise characteristics as well as the impact on the reachable performances in dual-comb ap...

中文翻译：

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单一激光源产生双梳子：中红外的原理和光谱学应用

双梳子光谱法（DCS）是一种有前途的实时，高精度和高灵敏度傅里叶变换光谱法。DCS需要一对紧密锁相的光学频率梳（OFC）。固有的复杂性阻碍了该技术的实际应用。最近，出现了一种新趋势，即从单个激光腔（称为双梳状激光器）中产生一对重复频率略有不同的OFC。共享的激光腔可以被动地消除共模技术噪声，并且可以很好地保持OFC之间的相互相干性。考虑到避免了麻烦的锁相系统，双梳状激光器为一对独立的OFC提供了有吸引力的替代方案。在这篇评论文章中，我们总结了最新的激光腔多路复用方案，该方案可在固态激光器中产生双梳子，光纤激光器以及片上波导激光器。它们的噪声特性以及对双梳状结构可达到的性能的影响。