Zero-spindle spectral drill: real-time spectral measurement in a fixed Fabry–Pérot cavity

An optical configuration for Fabry–Pérot cavity scanning using a geometric phase shifter, known as the “spectral drill,” is improved to acquire a spectrum in real-time. Previously, the resonance condition of the spectral drill is swept by the mechanical rotation of a phase plate comprising a geometr...

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Bibliographic Details
Published inOptics express Vol. 28; no. 15; pp. 22088 - 22094
Main Authors Ohno, Seigo, Miyamoto, Katsuhiko, Hayashi, Shin’ichiro, Sekine, Norihiko
Format Journal Article
LanguageEnglish
Published 20.07.2020
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Summary:An optical configuration for Fabry–Pérot cavity scanning using a geometric phase shifter, known as the “spectral drill,” is improved to acquire a spectrum in real-time. Previously, the resonance condition of the spectral drill is swept by the mechanical rotation of a phase plate comprising a geometric phase shifter, and the acquisition time is limited. In this work, using a q-plate and a camera instead of phase plate rotation and a photo detector, we remove all the spinning mechanics and increase the acquisition rate by a factor 720. This technique will be applied to locking laser frequency.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.397238