Observation of Squeezed Light in the 2 Μm Region
Name
PhysRevLett.120.203603.pdf
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Checksum (MD5)
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Author(s)
McRae, Terry G.
Altin, Paul A.
Yap, Min Jet
Ward, Robert L.
Slagmolen, Bram J. J.
Shaddock, Daniel A.
McClelland, David E.
Mansell, Georgia
Date Issued
May 2018
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Mansell, Georgia L. et al. "Observation of Squeezed Light in the 2 Μm Region." Physical Review Letters 120, 20 (May 2018): 203603 © 2018 American Physical Society
Version
Final published version
Abstract
We present the generation and detection of squeezed light in the 2 μm wavelength region. This experiment is a crucial step in realizing the quantum noise reduction techniques that will be required for future generations of gravitational-wave detectors. Squeezed vacuum is generated via degenerate optical parametric oscillation from a periodically poled potassium titanyl phosphate crystal, in a dual resonant cavity. The experiment uses a frequency stabilized 1984 nm thulium fiber laser, and squeezing is detected using balanced homodyne detection with extended InGaAs photodiodes. We have measured 4.0±0.1 dB of squeezing and 10.5±0.5 dB of antisqueezing relative to the shot noise level in the audio frequency band, limited by photodiode quantum efficiency. The inferred squeezing level directly after the optical parametric oscillator, after accounting for known losses and phase noise, is 10.7 dB.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.120.203603
