High-power quantum-limited 35 MHz photodiode and classical laser noise suppression

Vincent Dumont; Jiaxing Ma; Eamon Egan; Jack C Sankey

doi:10.1063/5.0170826

High-power quantum-limited 35 MHz photodiode and classical laser noise suppression

Rev Sci Instrum. 2023 Dec 1;94(12):123101. doi: 10.1063/5.0170826.

Authors

Vincent Dumont¹, Jiaxing Ma¹, Eamon Egan¹, Jack C Sankey¹

Affiliation

¹ Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada.

PMID: 38078816
DOI: 10.1063/5.0170826

Abstract

To benefit high-power interferometry and the creation of low-noise light sources, we develop a simple lead-compensated photodetector enabling quantum-limited readout from 0.3 to 10 mW and 10 kΩ gain from 85 Hz to 35 MHz, with a noise equivalent power of 9 pW/Hz. Feeding the detector output back to an intensity modulator, we suppress the classical amplitude noise of a commercial 1550 nm fiber laser to the shot noise limit over a bandwidth of 700 Hz-200 kHz, observing no degradation to its (nominally ∼100 Hz) linewidth.