TY - JOUR AU - Astar, W. AU - Apiratikul, Paveen AU - Cannon, Brice M. AU - Mahmood, Tanvir AU - Wathen, Jeremiah J. AU - Hryniewicz, John V. AU - Kanakaraju, S. AU - Richardson, Christopher J. K. AU - Murphy, Thomas E. AU - Carter, Gary M. TI - Conversion of RZ-OOK to RZ-BPSK by XPM in a Passive AlGaAs Waveguide JO - IEEE Photon. Technol. Lett. VL - 23 IS - 19 SP - 1397 EP - 1399 PY - 2011 DO - 10.1109/LPT.2011.2160165 AB - The conversion of data modulation format from 10-Gb/s return-to-zero on-off keying (RZ-OOK) to 10-Gb/s RZ binary phase-shift keying (RZ-BPSK) has been successfully carried out for the first time utilizing cross-phase modulation (XPM) in a passive AlGaAs waveguide. A 10e-9 bit-error-rate (BER) preamplified receiver sensitivity gain of ≈ 1 dB was measured for the converted RZ-BPSK relative to baseline RZ-OOK, whereas a penalty of ≈ 2.7 dB relative to baseline RZ-BPSK is explained to be due to cross-absorption modulation induced by nondegenerate two-photon absorption (ND-TPA), as well as to an insufficient nonlinear phase shift. ER -