We report the design and characteristics of a simple and compact mode-locked Er-doped fiber laser and its application to broadband cavity-enhanced spectroscopy. The graphene mode-locked polarization maintaining oscillator is thermally stabilized and equipped with three actuators that control the repetition rate: fast and slow fiber stretchers, and metal-coated fiber section. This allows wide tuning of the repetition rate and its stabilization to an external reference source. The applicability of the laser to molecular spectroscopy is demonstrated by detecting CO2 in air using continuous-filtering Vernier spectroscopy.

中文翻译：

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用于宽带腔增强光谱的紧凑型锁模掺铒光纤激光器

我们报告了简单紧凑的锁模掺铒光纤激光器的设计和特性及其在宽带腔增强光谱中的应用。石墨烯锁模保偏振荡器具有热稳定性，并配备了三个控制重复频率的致动器：快速和慢速光纤拉伸器，以及金属涂层光纤部分。这允许根据外部参考源对重复率及其稳定性进行广泛的调整。通过使用连续过滤游标光谱检测空气中的 CO2，证明了激光对分子光谱的适用性。