Title :
Dynamic channel equalization in reconfigurable WDM networks using acousto-optic tunable filters
Author :
Willner, A.E. ; Huang, S.H. ; Zou, X.Y. ; Hwang, S.-M. ; Smith, D.A. ; Bao, Z.
Author_Institution :
Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
One of the most promising technologies in optical networks is the use of wavelength-division multiplexing (WDM), in which many different-wavelength channels are simultaneously transmitted along the optical fiber. One key underlying technology which has enabled these systems is the introduction of the erbium-doped fiber amplifier EDFA. A glaring disadvantage of the EDFA is that the gain is not uniform with wavelength, causing a significant power and signal-to-noise ratio (SNR) differential among many channels. We will discuss our demonstrations of dynamically equalizing three 2.5 Gbit/s WDM channels in which the channel power differential is reduced from 20 dB to only 1 dB over a distance of 2,500 km by placing an acousto optical filter in an EDFA.
Keywords :
acousto-optical filters; band-pass filters; equalisers; fibre lasers; optical fibre networks; wavelength division multiplexing; 2.5 Gbit/s; 2500 km; EDFA; WDM; acousto optical filter; acousto-optic tunable filters; channel power differential; different-wavelength channels; dynamic channel equalization; dynamically equalizing; erbium-doped fiber amplifier; optical fiber; optical networks; reconfigurable WDM networks; signal-to-noise ratio; wavelength-division multiplexing; Erbium-doped fiber amplifier; Feedback loop; Intelligent networks; Optical attenuators; Optical feedback; Optical filters; Passband; Robust stability; WDM networks; Wavelength division multiplexing;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1996. LEOS 96., IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-3160-5
DOI :
10.1109/LEOS.1996.571611
