Title :
Experimental demonstration of dynamic network equalization of three 2.5-Gb/s WDM channels over 1000 km using acoustooptic tunable filters
Author :
Huang, S.H. ; Zou, X.Y. ; Hwang, S.-M. ; Willner, A.E. ; Bao, Z. ; Smith, D.A.
Author_Institution :
Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
We have experimentally demonstrated the dynamic equalization of the nonuniform EDFA gain and WDM-network channel-power variations by using acoustooptic tunable filters (AOTF´s) with active feedback. The AOTF´s have multiple independent passbands and act as dynamic wavelength-dependent loss elements. After 1000 km transmission in a recirculating loop, the power differential is reduced from 20 dB to 1 dB for three 2.5-Gb/s WDM channels covering an 8-nm wavelength range, and a 10/sup -9/ BER can be achieved for all channels.
Keywords :
acousto-optical filters; equalisers; fibre lasers; optical feedback; optical fibre networks; optical losses; tuning; wavelength division multiplexing; 1000 km; 2.5 Gbit/s; Gb/s WDM channels; WDM-network channel-power variations; acoustooptic tunable filters; active feedback; dynamic equalization; dynamic network equalization; dynamic wavelength-dependent loss elements; km transmission; multiple independent passbands; nonuniform EDFA gain; power differential; recirculating loop; Active filters; Bit error rate; Erbium-doped fiber amplifier; Feedback loop; Optical fiber polarization; Optical polarization; Passband; Performance gain; Switches; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
