Characterization of fiber-laser-based sub-Doppler NICE-OHMS for quantitative trace gas detection
Characterization of fiber-laser-based sub-Doppler NICE-OHMS for quantitative trace gas detection
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DOI：
10.1364/oe.16.014689
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发表时间：
2008-09-15
期刊：
影响因子：
3.8
通讯作者：
Axner, Ove
中科院分区：
文献类型：
--
作者：
Foltynowicz, Aleksandra;Ma, Weiguang;Axner, Ove
仔细研究了基于光纤激光器的亚多普勒噪声免疫腔增强光学外差分子光谱法用于痕量气体检测的潜力。研究了谐振亚多普勒色散信号对腔内压力和功率的非线性依赖性，并确定了与这些相关的最佳条件。证明了信号强度与浓度的线性关系，并讨论了该技术的动态范围。在 1531 nm 处对 C2H2 进行测量，饱和度高达 100。可检测的最小亚多普勒光学相移为 5 x 10(-11) cm(-1) Hz(-1/2)，对应于腔内压力为 20 mTorr、浓度为 10 ppb 时 C2H2 分压为 1 x 10(-12) atm。 400 毫托。 (C) 2008 年美国光学学会。
The potential of fiber-laser-based sub-Doppler noise-immune cavity-enhanced optical heterodyne molecular spectrometry for trace gas detection is scrutinized. The non-linear dependence of the on-resonance sub-Doppler dispersion signal on the intracavity pressure and power is investigated and the optimum conditions with respect to these are determined. The linearity of the signal strength with concentration is demonstrated and the dynamic range of the technique is discussed. Measurements were performed on C2H2 at 1531 nm up to degrees of saturation of 100. The minimum detectable sub-Doppler optical phase shift was 5 x 10(-11) cm(-1) Hz(-1/2), corresponding to a partial pressure of C2H2 of 1 x 10(-12) atm for an intracavity pressure of 20 mTorr, and a concentration of 10 ppb at 400 mTorr. (C) 2008 Optical Society of America.