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Updated: May 12, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Optimization of gain in traveling-wave optical parametric amplifiers by tuning the offset between pump- and
Gideon Alon1, Oo-Kaw Lim, Amar Bhagwat
1Center for Photonic Communication and Computing, Electrical Engineering and Computer Science Department, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
Abstract:
We present experimental demonstration and modeling of the optimization of a phase-sensitive optical parametric amplifier by tuning the relative position between the pump and signal beam waists along the propagation direction. At the optimum position, the pump beam focuses after the signal beam, and this departure from colocated waists increases with increasing pump power. Such optimization leads to more than 3 dB improvement in the measured deamplification response of the amplifier.
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