Title :
Conversion of RZ-OOK to RZ-BPSK by XPM in a Passive AlGaAs Waveguide
Author :
Astar, W. ; Apiratikul, Paveen ; Cannon, Brice M. ; Mahmood, Tanvir ; Wathen, J.J. ; Hryniewicz, John V. ; Kanakaraju, Subramaniam ; Richardson, Christopher J.K. ; Murphy, T.E. ; Carter, Gary M.
Author_Institution :
Lab. for Phys. Sci. (LPS), College Park, MD, USA
Abstract :
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 10-9-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.
Keywords :
III-V semiconductors; aluminium compounds; amplitude shift keying; data communication equipment; gallium arsenide; nonlinear optics; optical modulation; optical phase shifters; optical receivers; optical waveguides; phase modulation; phase shift keying; two-photon processes; AlGaAs; BER preamplified receiver; RZ binary phase-shift keying; RZ-BPSK; RZ-OOK; bit rate 10 Gbit/s; bit-error-rate; cross-absorption modulation; cross-phase modulation; data modulation format conversion; nondegenerate two-photon absorption; nonlinear phase shift; passive waveguide; return-to-zero on-off keying; Binary phase shift keying; Nonlinear optics; Optical waveguides; Probes; Receivers; Sensitivity; Cross-phase modulation (XPM); data modulation format conversion; nonlinear optics; two-photon absorption (TPA); waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2160165
