Cavity attenuated phase shift Faraday rotation spectroscopy

2018/08/21 by Patrick, Link, Westberg, Jonas, Wysocki, Gerard
#FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Optics (physics.optics)

paper · doi:10.48550/arxiv.1808.07468

Abstract

Cavity attenuated phase shift Faraday rotation spectroscopy has been developed and demonstrated by oxygen detection near 762 nm. The system incorporates a high-finesse cavity together with phase-sensitive balanced polarimetric detection for sensitivity enhancement and achieves a minimum detectable polarization rotation angle (1σ) of 5.6× 10^-9 rad/\surdHz, which corresponds to an absorption sensitivity of 4.5× 10^-10 cm^-1/\surdHz without the need for high sampling rate data acquisition.

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