Title :
Time-domain filtering to reduce signal-spontaneous beat noise for a pulse-type multiwavelength light source
Author :
Sanjoh, Hiroaki ; Tsuzuki, Ken ; Yoshikuni, Yuzo
Author_Institution :
NTT Photonics Labs., NTT Corp., Kanagawa, Japan
fDate :
5/1/2003 12:00:00 AM
Abstract :
A novel time-domain noise filtering scheme improves the signal-to-noise ratio (SNR) after an optical amplifier in pulse-type multiwavelength light sources. A reduction of signal-spontaneous beat noise is possible by using a synchronous time gate, which is not possible by conventional frequency domain filtering. Investigation of the amplifier noise reveals that this scheme significantly reduces minimum power required for a low SNR in amplifier output.
Keywords :
electro-optical filters; electro-optical modulation; laser noise; optical fibre amplifiers; time-domain analysis; wavelength division multiplexing; BER; EDFA; WDM; amplifier noise; electroabsorption modulator; minimum power; optical amplifier; power penalty measurements; pulse-type multiwavelength light sources; signal-spontaneous beat noise reduction; signal-to-noise ratio; synchronous time gate; time-domain noise filtering scheme; Filtering; Light sources; Noise reduction; Optical amplifiers; Optical filters; Optical noise; Optical pulses; Pulse amplifiers; Signal to noise ratio; Time domain analysis;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.810245
