Extending transmission distance of high-density WDM systems using post transmitter fiber Raman amplifiers

Author

Kao, Ming-Seng ; Wu, Jingshown

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

9

Issue

3

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

394

Lastpage

399

Abstract

The authors investigate the behavior of multichannel signals in a high-density wavelength division multiplexing (WDM) system with the consideration of stimulated Raman scattering. A parameter to evaluate the depth of Raman crosstalk is provided, and the transmission distance limitation imposed by Raman crosstalk is analyzed. To extend the system transmission distance, a post-transmitter fiber Raman amplifier is used. The allocation of signal channels on the pump gain profile is discussed. It is found that there exists an optimum pump power which results in a maximum amplifier gain. The example shows that the transmission distance limitation imposed by Raman crosstalk can be extended by 20 km for a 30-channel system with 0.25-dB/km fiber loss

Keywords

Raman lasers; crosstalk; fibre lasers; frequency division multiplexing; optical communication equipment; optical links; optical pumping; stimulated Raman scattering; 0.25 dB; 30-channel system; Raman crosstalk; fiber loss; high-density WDM systems; maximum amplifier gain; multichannel signals; optimum pump power; post transmitter fiber Raman amplifiers; pump gain profile; signal channels; stimulated Raman scattering; transmission distance; wavelength division multiplexing; Fiber nonlinear optics; Optical crosstalk; Optical fiber amplifiers; Optical fibers; Optical pumping; Optical scattering; Optical transmitters; Raman scattering; Stimulated emission; Wavelength division multiplexing;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.70018

Filename

70018