Common-mode phase noise suppression with an open-loop differential phasemeter

We present direct differential phase recovery-an open-loop phasemeter topology for differential optical interferometric measurements. The technique aims to remove common mode signal dynamics prior to phase-tracking, which reduces the dynamic range requirements of the phasemeter tracking optical phas...

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Bibliographic Details
Published inOptics express Vol. 32; no. 27; p. 48276
Main Authors Dey, Anneshwa, Sibley, Paul G., Wong, Justin, Gray, Malcolm B., Bandutunga, Chathura P.
Format Journal Article
LanguageEnglish
Published United States 30.12.2024
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Summary:We present direct differential phase recovery-an open-loop phasemeter topology for differential optical interferometric measurements. The technique aims to remove common mode signal dynamics prior to phase-tracking, which reduces the dynamic range requirements of the phasemeter tracking optical phase differences. A phase difference measurement is experimentally demonstrated with this technique, achieving a phase sensitivity of 1 × 10 −6 rad/Hz with a common-mode noise rejection of 141 dB. We demonstrate this performance whilst individual channels are subject to numerous cycle slips and unable to track phase.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.545972