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

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 a...

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Bibliographic Details
Published in:Review of scientific instruments 2023-12, Vol.94 (12)
Main Authors: Dumont, Vincent, Ma, Jiaxing, Egan, Eamon, Sankey, Jack C.
Format: Article
Language:English
Subjects:
Fiber lasers
Light sources
Noise reduction
Photodiodes
Shot noise
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Summary: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.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0170826