Title :
Capacity upgrades of transmission systems by Raman amplification
Author :
Hansen, P.B. ; Eskildsen, L. ; Grubb, S.G. ; Stentz, A.J. ; Strasser, T.A. ; Judkins, J. ; DeMarco, J.J. ; Pedrazzani, R. ; DiGiovanni, D.J.
Author_Institution :
Bell Labs., Lucent Technol., Holmdel, NJ, USA
Abstract :
Raman amplification is added to a transmission system to provide an increase in power budget allowing for a four-fold upgrade in capacity either by TDM or WDM. Here, a TDM upgrade from 2.5 to 10 Gb/s and a WDM upgrade from a single 10-Gb/s channel to four channels of 10 Gb/s each were experimentally verified with an improvement in the power budget of 7.4 dB. Raman gain is an attractive upgrade method for installed systems requiring no changes to the fiber span.
Keywords :
Raman lasers; Raman spectra; fibre lasers; optical fibre networks; optical pumping; time division multiplexing; wavelength division multiplexing; 2.5 to 10 Gbit/s; Gb/s channel; Raman amplification; Raman gain; Raman lasers; Raman spectra; TDM; TDM upgrade; WDM; WDM upgrade; attractive upgrade method; capacity upgrades; fiber span; four-fold capacity upgrade; installed systems; power budget; transmission systems; Erbium-doped fiber lasers; Gain measurement; Optical fiber communication; Optical fibers; Optical receivers; Pump lasers; Semiconductor laser arrays; Stimulated emission; Time division multiplexing; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
