In this paper, we demonstrate a rapid high-resolution frequency comb spectrometer involving a mode-locked laser comb and a multi-colour laser. The heterodyne detection of the two lasers enables hundreds of thousands of Doppler-limited molecular spectra to be recorded in a second. With this device, several P-branch transitions of the H 13 CN (gas) 2ν 3 -band are simultaneously interrogated at comb-line-defined resolution (54.5 MHz or 0.5 pm) within 3 μ s. The single-measurement spectrum spans >200 GHz (∼1.6 nm) far beyond the electronic bandwidth (33 GHz) of our acquisition system. Without using asynchronous combs or dispersers and detection arrays, the spectrometer may benefit many gas sensing applications, such as environmental monitoring.

中文翻译：

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使用光纤激光梳和多色激光的频率梳干涉光谱

在本文中，我们演示了一种包含锁模激光梳和多色激光的快速高分辨率频率梳光谱仪。两个激光的外差检测可以在一秒钟内记录成千上万个受多普勒限制的分子光谱。使用该设备，可以在3μs内以梳状线定义的分辨率（54.5 MHz或0.5 pm）同时询问H 13 CN（气体）2ν3带的几个P分支跃迁。单次测量的频谱跨度大于200 GHz（〜1.6 nm），远远超出了我们采集系统的电子带宽（33 GHz）。如果不使用异步梳，分散器和检测阵列，该光谱仪可能会使许多气体传感应用受益，例如环境监测。