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A Double-Pass Cavity-Enhanced Spectrometer with a Polarization Analyzed Readout

Guan, Yajie; Bandutunga, Chathura; Gray, Malcolm; Chow, Jong


We describe a new optical cavity-enhanced spectroscopy technique which uses a polarization analyzed readout for molecular absorption. It has a double-pass cavity configuration which serves as both a spatial as well as frequency mode self-cleaner. We demonstrate a quantum noise-equivalent absorption sensitivity of ~3x10-13 /vHz /cm, with a sample of carbon dioxide gas in a cavity of finesse ~2000.

CollectionsANU Research Publications
Date published: 2021
Type: Conference paper
Source: 2021 Conference on Lasers and Electro-Optics (CLEO)
DOI: 10.1364/CLEO_AT.2021.AM4P.5


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