Sensing Optical Cavity Mismatch with a Mode-converter and Quadrant Photodiode

Authors

Fabian Magana-Sandoval, Syracuse University
Thomas Vo, Syracuse University
Daniel Vander-Hyde, Syracuse University
Jaclyn (Jax) Sanders, Marquette UniversityFollow
Stefan W. Ballmer, Syracuse University

Document Type

Article

Language

eng

Publication Date

11-18-2019

Publisher

American Physical Society

Source Publication

Physical Review D

Source ISSN

2470-0010

Abstract

We present a new technique for sensing optical cavity mode mismatch and alignment by using a cylindrical lens mode converting telescope, radio-frequency quadrant photodiodes, and a heterodyne detection scheme. The telescope allows the conversion of the Laguerre-Gauss bullseye mode (LG₀₁) into the 45° rotated Hermite-Gauss (“pringle”) mode (HG₁₁), which can be easily measured with quadrant photodiodes. We show that we can convert to the HG basis optically, measure mode mismatched and alignment signals using widely produced radio-frequency quadrant photodiodes, and obtain a feedback error signal with heterodyne detection.

Comments

Published version. Physical Review D, Vol. 100, No. 10 (November 18, 2019): 102001. DOI. © 2019 American Physical Society. Used with permission.

Recommended Citation

Magana-Sandoval, Fabian; Vo, Thomas; Vander-Hyde, Daniel; Sanders, Jaclyn (Jax); and Ballmer, Stefan W., "Sensing Optical Cavity Mismatch with a Mode-converter and Quadrant Photodiode" (2019). Physics Faculty Research and Publications. 179.
https://epublications.marquette.edu/physics_fac/179