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Updated: Jun 8, 2026
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Generation of squeezed light with a monolithic optical parametric oscillator: simultaneous achievement of phase
Hidehiro Yonezawa1, Koyo Nagashima, Akira Furusawa
1Department of Applied Physics, School of Engineering, The University of Tokyo, Tokyo, Japan. yonezawa@ap.t.u-tokyo.ac.jp
Abstract:
We generate squeezed state of light at 860 nm with a monolithic optical parametric oscillator. The optical parametric oscillator consists of a periodically poled KTiOPO(4) crystal, both ends of which are spherically polished and mirror-coated. We achieve both phase matching and cavity resonance by controlling only the temperature of the crystal. We observe up to -8.0±0.2 dB of squeezing with the bandwidth of 142 MHz. Our technique makes it possible to drive many monolithic cavities simultaneously by a single laser. Hence our monolithic optical parametric oscillator is quite suitable to continuous-variable quantum information experiments where we need a large number of highly squeezed light beams.
