Mode Converter and Quadrant Photodiode for Sensing Optical Cavity Mode Mismatch

Daniel Vander-Hyde (Inventor), Fabian Magana-Sandoval (Inventor), Jax Sanders (Inventor), Stefan Werner Ballmer (Inventor), Thomas Vo (Inventor)

Research output: Patent

Abstract

A new technique for sensing optical cavity mode mismatch using a mode converter formed from a cylindrical lens mode converting telescope, radio frequency quadrant photodiodes (RFQPDs), and a heterodyne detection scheme. The telescope allows the conversion of the Laguerre-Gauss basis to the Hermite-Gauss (HG) basis, which can be measured with quadrant photodiodes. Conversion to the HG basis is performed optically, measurement of mode mismatched signals is performed with the RFQPDs, and a feedback error signal is obtained with heterodyne detection.
Original languageEnglish (US)
StatePublished - Dec 27 2018

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Vander-Hyde, D., Magana-Sandoval, F., Sanders, J., Ballmer, S. W., & Vo, T. (2018). Mode Converter and Quadrant Photodiode for Sensing Optical Cavity Mode Mismatch.