Theoretical investigation of 8 × 10-Gb/s WDM signal transmission performance based on gain-equalized SOAs using backward Raman pumping at DCF

Author

Hur, Sub ; Ko, Jeongyun ; Lee, Inkyu ; Kim, Y.S. ; Jeong, Jichai

Author_Institution

Dept. of Radio Eng., Korea Univ., Seoul, South Korea

Volume

21

Issue

6

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

1499

Lastpage

1503

Abstract

We have theoretically investigated 8 × 10-Gb/s wavelength-division multiplexing (WDM) signal transmission characteristics based on semiconductor optical amplifiers (SOAs) with equalized gain using discrete Raman amplification (DRA). Gain equalization and low noise figures have been obtained by adjusting the backward Raman pumping power and wavelength at a dispersion compensating fiber (DCF) for each span. Bit-error-rate characteristics were calculated for 8 × 10-Gb/s WDM signal transmission over 6 × 40-km single-mode fiber (SMF) + DCF links with gain-equalized SOAs using DRAs at DCF. Approximately a 2.5-dB improvement of the receiver sensitivity was achieved by using SOAs and DRAs with optimized Raman pumping. One can easily upgrade the transmission length of a link based on SOAs with an appropriate backward pump laser at each DCF.

Keywords

Raman lasers; compensation; laser noise; optical fibre amplifiers; optical fibre communication; optical fibre dispersion; optical pumping; optical receivers; semiconductor optical amplifiers; sensitivity; wavelength division multiplexing; 10 Gbit/s; 240 km; 40 km; 80 Gbit/s; Gb/s WDM signal transmission performance; Raman lasers; Raman optical fibre amplifier; WDM signal transmission; backward Raman pumping; backward pump laser; bit-error-rate characteristics; discrete Raman amplification; dispersion compensating fiber; equalized gain; gain equalization; gain-equalized SOA; gain-equalized SOAs; low noise figures; optimized Raman pumping; receiver sensitivity; semiconductor optical amplifiers; single-mode fiber; transmission length; wavelength-division multiplexing; Noise figure; Optical distortion; Optical pulse shaping; Optical pumping; Optical receivers; Optical sensors; Pulse amplifiers; Semiconductor optical amplifiers; Stimulated emission; Wavelength division multiplexing;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2003.812466

Filename

1216187