Title :
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
fDate :
3/1/1991 12:00:00 AM
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;
Journal_Title :
Lightwave Technology, Journal of
