Open AccessZero-spindle spectral drill: real-time spectral measurement in a fixed Fabry–Pérot cavity
Author(s) -
Seigo Ohno,
Katsuhiko Miyamoto,
Shin’ichiro Hayashi,
Norihiko Sekine
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.397238
Subject(s) - optics , fabry–pérot interferometer , rotation (mathematics) , phase shift module , finesse , phase (matter) , materials science , drill , laser , physics , insertion loss , geometry , mathematics , quantum mechanics , metallurgy
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.