Experimental demonstration of active equalization and ASE suppression of three 2.5-Gb/s WDM-network channels over 2500 km using AOTF as transmission filters

By using acoustooptic tunable filters with active feedback, we have experimentally demonstrated the dynamic channel-power equalization of the nonuniform EDFA gain as well as interchannel ASE suppression. The AOTF's have multiple independent passbands and act as dynamic wavelength-dependent loss...

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Bibliographic Details
Published in:IEEE photonics technology letters 1997-03, Vol.9 (3), p.389-391
Main Authors: Huang, S.H., Zou, X.Y., Willner, A.E., Bao, Z., Smith, D.A.
Format: Article
Language:English
Subjects:
Active filters
Bit error rate
Erbium-doped fiber amplifier
Feedback
Optical amplifiers
Optical control
Optical filters
Passband
Power amplifiers
Wavelength division multiplexing
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Summary:By using acoustooptic tunable filters with active feedback, we have experimentally demonstrated the dynamic channel-power equalization of the nonuniform EDFA gain as well as interchannel ASE suppression. The AOTF's have multiple independent passbands and act as dynamic wavelength-dependent loss elements. After 2500 km, the power differential is reduced from over 20 dB to /spl sim/1 dB for three 2.5-Gb/s WDM channels covering an /spl sim/8-nm wavelength range, and a 10/sup -9/ BER can be achieved for all channels.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.556083