The polarization-insensitive data transfer of 10-Gb/s return-to-zero ON-OFF keying (RZ-OOK) to RZ-binary phase-shift keying (RZ-BPSK) has been successfully carried out for the first time, in a passive birefringent nonlinear Al<sub>0.18</sub> Ga<sub>0.82</sub>As waveguide, utilizing polarization-insensitive cross-phase-modulation (PI-XPM). A 10<sup>-9</sup> bit-error-rate (BER) pre-amplified receiver sensitivity penalty of ≈2.2 dB relative to baseline RZ-BPSK was measured for PI-XPM, when the RZ-OOK pump was polarization-scrambled and the RZ-probe was launched at 40°. The probe's optimal launch angle for PI-XPM was significantly influenced by the anisotropy of the Al<sub>0.18</sub> Ga<sub>0.82</sub>As waveguide.
© 2013 IEEE
Brice M. Cannon, W. Astar, Tanvir Mahmood, Paveen Apiratikul, George A. Porkolab, Christopher J. K. Richardson, and Gary M. Carter, "Data Transfer From RZ-OOK to RZ-BPSK by Polarization-Insensitive XPM in a Passive Birefringent Nonlinear AlGaAs Waveguide," J. Lightwave Technol. 31, 952-966 (2013)