Title :
Suppression of cross-gain modulation in SOA using RZ-DPSK modulation format
Author :
Cho, Pak S. ; Khurgin, Jacob B.
Author_Institution :
CeLight Inc., Silver Spring, MD, USA
Abstract :
Conventional ON-OFF keyed modulation format is susceptible to cross-gain modulation in saturated semiconductor optical amplifiers (SOAs) that leads to crosstalk penalty for dense wavelength-division-multiplexing (DWDM) input signals. Differential phase-shift keying of optical pulses has virtually no pulse-pattern effect and is robust to cross-gain modulation. We report experimental results that confirm reduction of crosstalk penalty in SOA with differential phase-shift-keyed DWDM input signals in comparison with ON-OFF keyed signals operating at 12.5 Gb/s with 25-GHz channel spacing.
Keywords :
differential phase shift keying; optical crosstalk; optical modulation; optical transmitters; semiconductor optical amplifiers; wavelength division multiplexing; 12.5 Gbit/s; DWDM input signals; RZ-DPSK modulation format; SOA; cross-gain modulation suppression; crosstalk penalty reduction; dense wavelength-division-multiplexing; differential phase-shift keying; pulse-pattern effect; saturated semiconductor optical amplifiers; Crosstalk; Differential phase shift keying; Lead compounds; Optical pulses; Phase modulation; Pulse amplifiers; Pulse modulation; Robustness; Semiconductor optical amplifiers; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.805795
