Implementation of Efficient Transversely-Pumped Counter-Propagating Optical Parametric Amplifiers and Difference-Frequency Generation

摘要

Our objective is to eventually generate and amplify mid-IR waves based on GaAs/AlGaAs multilayers in a transverse-pumping geometry. Within the funding period, we have successfully set up and tested an OPA pumped by a Regenerative Amplifier. We have recently designed and grown a new multilayer structure for efficiently generating 2.66 micrometers by mixing 1.55 micrometers and 980 nm in a transverse-pumping geometry. Experimentally, we have observed high-order phase-matching peaks for second-harmonic generation in GaAs/AlAs multilayers in reflection geometry and confirmed quadratic dependence of the second-harmonic pulse energy on pump pulse energy for the first time. We will continue to work towards our eventual goal, which will make long-lasting and dramatic impact on optical communications, and can be eventually used for counter measure, remote sensing, spectroscopy, and optical signal processing.