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Low-loss nonlinear AlGaAs waveguides are fabricated using plasma-assisted photoresist reflow. A 6.8-dB continuous-wave four-wave mixing conversion efficiency in a 1.35-µm-wide waveguide, and a 44-nm half-width 3-dB bandwidth in a 0.65-µm-wide waveguide are demonstrated.
Polarization-insensitive (PI) wavelength conversion of 100-GHz-spaced wavelength-division multiplexed 410 Gb/s return-to-zero binary phase-shift keyed (RZ-BPSK) signals was successfully demonstrated utilizing four-wave mixing for the first time in a passive, birefringent nonlinear AlGaAs waveguide. In addition to a pump launch angle adjustment, a minimum pump-probe detuning was also required...
By engineering the bandgap to suppress two-photon absorption, we achieve efficient continuous-wave four-wave mixing in a passive AlGaAs waveguide. The observed conversion efficiency (−5.5 dB) is among the highest reported for semiconductor waveguides.
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