STUDY OF POLARIZATION-INSENSITIVE WAVE MIXING IN BULK SEMICONDUCTOR OPTICAL AMPLIFIERS

A detailed experimental investigation of polarization-insensitive dual -pump wave mixing in bulk, polarization-insensitive semiconductor opti cal amplifier (SOA) is reported, Measurements of the phase conjugated, polarization-insensitive four-wave mixing (FWM) efficiency are report ed versus: 1) pump-signal wavelength spacing while keeping the wavelen gth spacing between the two orthogonally polarized pumps constant and 2) wavelength spacing between the pumps while keeping the signal-wavel ength constant, The achieved wavelength conversion bandwidth of the po larization-insensitive scheme is approximately 60 nm with efficiency b etween 8 and -20 dB, The obtained results are in good agreement with t heoretical predictions.