Opt Lett. 2019 Jan 1;44(1):65-68. doi: 10.1364/OL.44.000065.
Frequency-agile dual-comb spectroscopy (DCS) with electro-optic modulators (EOMs) promises to facilitate the implementation of DCS in many environmental applications. In this Letter, we demonstrate a 1 MHz resolution electro-optic dual-comb system with a measurement speed of 20 kHz. We generate an electro-optic frequency comb (EOFC) consisting of 50000 teeth with 1 MHz line spacing. Each comb tooth is well resolved by another EOFC with 2.5 GHz line spacing. We record transmittances of high Q-factor resonators within milliseconds. Our figure of merit is shown to be 36 times more sensitive than a configuration that would beat two combs of 1 MHz spacing.
基于电光调制器（EOM）的频率捷变双梳光谱学（DCS）有望促进 DCS 在许多环境应用中的实现。在本信中，我们展示了一个具有 20 kHz 测量速度的 1 MHz 分辨率电光双梳系统。我们生成了一个由 50000 个齿组成的电光频率梳（EOFC），线间距为 1 MHz。每个梳齿都由另一个线间距为 2.5 GHz 的 EOFC 很好地分辨。我们在毫秒内记录了高 Q 因子谐振器的透过率。我们的品质因数比两个 1 MHz 间距梳的拍频配置敏感 36 倍。
