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Dynamic channel equalization in reconfigurable WDM networks using acousto-optic tunable filters

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6 Author(s)
Willner, A.E. ; Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA ; Huang, S.H. ; Zou, X.Y. ; Hwang, S.-M.
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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.

Published in:

Lasers and Electro-Optics Society Annual Meeting, 1996. LEOS 96., IEEE  (Volume:2 )

Date of Conference:

18-21 Nov. 1996