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

Volume

15

Issue

5

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

757

Lastpage

759

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2003.810245

Filename

1196160