Squeezing phase diffusion

Abstract

We address the use of optical parametric oscillator (OPO) to counteract phase-noise in quantum optical communication channels, and demonstrate reduction of phase diffusion for coherent signals travelling through a suitably tuned OPO. In particular, we theoretically and experimentally show that there is a threshold value on the phase-noise, above which OPO can be exploited to squeeze phase noise. The threshold depends on the energy of the input coherent state, and on the relevant parameters of the OPO, i.e. gain and input/output and crystal loss rates.

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Cited by in corpus (6)

• Quantum probes for the characterization of nonlinear media
• Squeezing as a resource to counteract phase diffusion in optical phase estimation
• Phase noise mitigation by a realistic optical parametric oscillator
• A robust hybrid receiver for binary phase-shift keying discrimination in the presence of phase noise
• Quantum communications in continuous variable systems
• Novel technique for the active stabilization of the relative phase between seed and pump in an optical parametric oscillator