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

Seigo Ohno, Katsuhiko Miyamoto, Shin'Ichiro Hayashi, Norihiko Sekine

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)22088-22094
Number of pages7
JournalOptics Express
Volume28
Issue number15
DOIs
Publication statusPublished - 2020 Jul 20

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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