Observation of Squeezed Light in the 2  μm Region.

Autor: Mansell GL; OzGrav, Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Acton, Australian Capital Territory 2601, Australia.; LIGO Hanford Observatory, P.O. Box 159, Richland, Washington 99352, USA.; Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA., McRae TG; OzGrav, Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Acton, Australian Capital Territory 2601, Australia., Altin PA; OzGrav, Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Acton, Australian Capital Territory 2601, Australia., Yap MJ; OzGrav, Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Acton, Australian Capital Territory 2601, Australia., Ward RL; OzGrav, Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Acton, Australian Capital Territory 2601, Australia., Slagmolen BJJ; OzGrav, Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Acton, Australian Capital Territory 2601, Australia., Shaddock DA; OzGrav, Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Acton, Australian Capital Territory 2601, Australia., McClelland DE; OzGrav, Department of Quantum Science, Research School of Physics and Engineering, Australian National University, Acton, Australian Capital Territory 2601, Australia.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2018 May 18; Vol. 120 (20), pp. 203603.
DOI: 10.1103/PhysRevLett.120.203603
Abstrakt: 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.
Databáze: MEDLINE