Details

Autor(en) / Beteiligte

• Mansell, Georgia L
• McRae, Terry G
• Altin, Paul A
• Yap, Min Jet
• Ward, Robert L
• Slagmolen, Bram J J
• Shaddock, Daniel A
• McClelland, David E

Titel

Observation of Squeezed Light in the 2  μm Region

Ist Teil von

• Physical review letters, 2018-05, Vol.120 (20), p.203603-203603, Article 203603

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2018

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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.