Conversion of RZ-OOK to RZ-BPSK by XPM in a Passive AlGaAs Waveguide
Published/Posted: October 1, 2011
Authors: Astar, W.; Apiratikul, P.; Cannon, B. M.; Mahmood, T.; Wathen, J. J.; Hryniewicz, J. V.; Kanakaraju, S.; Richardson, C. J. K.; Murphy, T. E.; Carter, G. M.
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.
W. Astar, P. Apiratikul, B. M. Cannon, T. Mahmood, J. J. Wathen, J. V. Hryniewicz, S. Kanakaraju, C. J. K. Richardson, T. E. Murphy and G. M. Carter, "Conversion of RZ-OOK to RZ-BPSK by XPM in a Passive AlGaAs Waveguide", IEEE Photon. Technol. Lett. 23(19) 1397-1399 (2011)
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