Squeezed light in an optical parametric oscillator network with coherent feedback quantum control.
We present squeezing and anti-squeezing spectra of the output from a degenerate optical parametric oscillator (OPO) network arranged in different coherent quantum feedback configurations. One OPO serves as a quantum plant, the other as a quantum controller. The addition of coherent feedback enables shaping of the output squeezing spectrum of the plant, and is found to be capable of pushing the frequency of maximum squeezing away from the optical driving frequency and broadening the spectrum over a wider frequency band. The experimental results are in excellent agreement with the developed theory, and illustrate the use of coherent quantum feedback to engineer the quantum-optical properties of the plant OPO output.
Ginzton Laboratory, Stanford University, 348 Via Pueblo Mall, Stanford, CA 94305, USA.
Orion
O
Crisafulli
Nikolas
N
Tezak
Daniel B S
DB
Soh
Michael A
MA
Armen
Hideo
H
Mabuchi
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D009991:Oscillometry / Q000295:instrumentation*; D011789:Quantum Theory; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*