一种用于气体传感的新型单频稳定法布里-珀罗1590纳米激光二极管。

A novel single frequency stabilized Fabry-Perot laser diode at 1590 nm for gas sensing.

作者信息

Weldon Vincent, Boylan Karl, Corbett Brian, McDonald David, O'Gorman James

机构信息

Physics Department, Trinity College, University of Dublin, Ireland.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2002 Sep;58(11):2433-8. doi: 10.1016/s1386-1425(02)00059-8.

DOI:10.1016/s1386-1425(02)00059-8

PMID:12353693

Abstract

A novel single frequency stabilized Fabry-Perot (SFP) laser diode with an emission wavelength of lambda = 1590 nm for H2S gas sensing is reported. Sculpting of the multi-mode spectral distribution of a FP laser to achieve single frequency emission is carried out using post growth photolitographic processing of the device. The resulting longitudinal-mode controlled FP laser has a stabilized single frequency emission with a side mode suppression ratio (SMSR) of 40 dB. The application of this device to spectroscopic based H2S sensing is demonstrated by targeting absorption lines in the wavelength range 1588 < or = lambda < or = 1591 nm. Using wavelength modulation spectroscopy (WMS), a low detection limit of 120 ppm x m x Hz(-1/2) was estimated while targeting the absorption line at 1590.08 nm. These initial results demonstrate the potential of the stabilized FP laser diode at this wavelength as a tunable, single frequency source for spectroscopic based gas sensing.

摘要

报道了一种用于H2S气体传感的新型单频稳定法布里-珀罗（SFP）激光二极管，其发射波长为λ = 1590 nm。通过对器件进行生长后光刻处理，对FP激光器的多模光谱分布进行整形以实现单频发射。所得的纵向模式控制FP激光器具有稳定的单频发射，边模抑制比（SMSR）为40 dB。通过针对1588≤λ≤1591 nm波长范围内的吸收线，证明了该器件在基于光谱的H2S传感中的应用。使用波长调制光谱法（WMS），在针对1590.08 nm处的吸收线时，估计出低检测限为120 ppm·m·Hz^(-1/2)。这些初步结果证明了该波长下稳定的FP激光二极管作为基于光谱的气体传感的可调谐单频源的潜力。