Title :
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
Author :
Huang, S.H. ; Zou, X.Y. ; Willner, A.E. ; Bao, Z. ; Smith, D.A.
Author_Institution :
Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA
fDate :
3/1/1997 12:00:00 AM
Abstract :
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.
Keywords :
acousto-optical filters; band-pass filters; channel capacity; equalisers; error statistics; optical communication equipment; optical feedback; superradiance; wavelength division multiplexing; 2.5 Gbit/s; 2.5-Gb/s WDM-network channels; 2500 km; ASE suppression; BER; acoustooptic tunable filters; active equalization; active feedback; dynamic channel-power equalization; dynamic wavelength-dependent loss elements; interchannel ASE suppression; multiple independent passbands; nonuniform EDFA gain; power differential; transmission filters; Active filters; Bit error rate; Erbium-doped fiber amplifier; Feedback; Optical amplifiers; Optical control; Optical filters; Passband; Power amplifiers; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
