Abstract

We theoretically investigate the smoothing effects on the signal temporal phase and intensity in the optical parametric amplification (OPA) process. The theoretical model was set up based on the coupled second-order three-wave nonlinear propagation equations in the plane-wave limit, using the phase and intensity modulation to mimic the input noise to the signal. The analytical and numerical results indicate that the walk-off between the signal and the idler plays a dominant role in the temporal smoothing process of OPA, and the smoothing process by a walk-off and broad-bandwidth parametric amplification can be achieved simultaneously. Compared with the walk-off smoothing mechanism, the gain saturation can only smooth the temporal intensity fluctuation. We provide equations for estimating the smoothable modulation cycle.

© 2016 Optical Society of America

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