Huh Jeong Hyun, Chen Zaijun, Vicentini Edoardo, Hänsch Theodor W, Picqué Nathalie
Opt Lett. 2021 Aug 15;46(16):3957-3960. doi: 10.1364/OL.431451.
Time-resolved near-infrared absorption spectroscopy of single non-repeatable transient events is performed at high spectral resolution with a dual-comb interferometer using a continuous-wave laser followed by a single electro-optic amplitude modulator. By sharing high-speed electrical/optical components, our spectrometer greatly simplifies the implementation of dual-comb spectroscopy and offers a high mutual coherence time, measured up to 50 s, without any active stabilization system and/or data processing. The time resolution is as short as 100 µs in our experimental demonstration. For a span of 36 GHz, the mean signal-to-noise ratio of 80, at 100-MHz spectral resolution and 100-µs measurement time, enables precise determination of the parameters of rovibrational lines, including intensity or concentration.
利用连续波激光器和单个电光幅度调制器，通过双梳状干涉仪以高光谱分辨率对单个不可重复瞬态事件进行时间分辨近红外吸收光谱分析。通过共享高速电气/光学组件，我们的光谱仪极大地简化了双梳状光谱学的实施，并提供了高达50秒的高相互相干时间，无需任何有源稳定系统和/或数据处理。在我们的实验演示中，时间分辨率短至100微秒。对于36吉赫兹的跨度，在100兆赫兹光谱分辨率和100微秒测量时间下，平均信噪比为80，能够精确确定振转谱线的参数，包括强度或浓度。
