Title :
Linear and nonlinear crosstalk suppression for DWDM RZ-DPSK transmitter using a saturated SOA as power booster amplifier
Author :
Li, Zhihong ; Li, Guifang
Author_Institution :
CREOL, Univ. of Central Florida, Orlando, FL, USA
fDate :
4/1/2006 12:00:00 AM
Abstract :
Saturated semiconductor optical amplifiers (SOAs) can be used as booster amplifiers for dense wavelength-division-multiplexing (DWDM) return-to-zero differential phase-shift keying (RZ-DPSK) transmitters. By introducing time interleaving (TI), both linear crosstalk induced by WDM components and nonlinear crosstalk induced by SOA nonlinearities are suppressed. Receiver sensitivities for four-channel DWDM RZ-DPSK signals with 100- and 50-GHz channel spacing were improved 2.2 and 4.2 dB, respectively, by applying proper TI between adjacent channels. A 1-dB gain enhancement was also achieved.
Keywords :
channel spacing; differential phase shift keying; optical crosstalk; optical fibre communication; optical saturation; optical transmitters; semiconductor optical amplifiers; wavelength division multiplexing; 100 GHz; 50 GHz; DWDM RZ-DPSK transmitter; SOA nonlinearities; channel spacing; dense wavelength division multiplexing; gain enhancement; linear crosstalk suppression; nonlinear crosstalk suppression; optical transmitters; power booster amplifier; receiver sensitivities; return-to-zero differential phase-shift keying; saturated SOA; time interleaving; Crosstalk; Differential amplifiers; Differential phase shift keying; Interleaved codes; Optical amplifiers; Optical receivers; Optical transmitters; Power amplifiers; Semiconductor optical amplifiers; Wavelength division multiplexing; Crosstalk suppression; four-wave mixing (FWM); return-to-zero differential phase-shift keying (RZ-DPSK); semiconductor optical amplifier (SOA);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.871843
