Ultrasensitive absorption spectroscopy with a high-finesse optical cavity and off-axis alignment
Ultrasensitive absorption spectroscopy with a high-finesse optical cavity and off-axis alignment
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DOI：
10.1364/ao.40.004904
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发表时间：
2001-09-20
期刊：
影响因子：
1.9
通讯作者：
Anderson, JG
中科院分区：
文献类型：
--
作者：
Paul, JB;Lapson, L;Anderson, JG
提出了一种简单易用的方法，可以将高精细度的光学腔用作光谱学的吸收单元。该方法通过使用离轴腔对准几何结构将单模连续波激光器引入腔中，系统地消除了通常与光学腔相关的共振，同时保留了这些腔的吸收信号放大特性。与其他高分辨率腔吸收方法相比，这大大降低了设备的复杂性。将该技术与腔衰荡光谱或集成腔输出光谱结合使用，分别产生1.5 × 10(-9) cm(-1) Hz（-1/2）和1.8 × 10(-10) cm(-1) Hz（-1/2）的吸收灵敏度。(C) 2001美国光学学会。
A simple and easy to use method that allows high-finesse optical cavities to be used as absorption cells for spectroscopic purposes is presented. This method introduces a single-mode continuous-wave laser into the cavity by use of an off-axis cavity alignment geometry to eliminate systematically the resonances commonly associated with optical cavities, while preserving the absorption signal amplifying properties of such cavities. This considerably reduces the complexity of the apparatus compared with other high-resolution cavity-based absorption methods. Application of this technique in conjunction with either cavity ringdown spectroscopy or integrated cavity output spectroscopy produced absorption sensitivities of 1.5 x 10(-9) cm(-1) Hz(-1/2) and 1.8 x 10(-10) cm(-1) Hz(-1/2), respectively. (C) 2001 Optical Society of America.