Jx. Cai et al., EXPERIMENTAL DEMONSTRATION OF DYNAMIC HIGH-SPEED EQUALIZATION OF 3 WDM CHANNELS USING ACOUSTOOPTIC MODULATORS AND A WAVELENGTH DEMULTIPLEXER, IEEE photonics technology letters, 9(5), 1997, pp. 678-680
We have experimentally demonstrated the dynamic equalization of three
WDM channels by using a polarization-independent passive wavelength de
multiplexer, a parallel array of AO modulators, and a dynamic feedback
control circuit. This module actively equalizes the power differentia
l from >10 dB to within 1 dB of three channels spanning a range of 8 n
m, This module can respond faster than 0.1 mu s. After 1000 km of tran
smission within a recirculating fiber loop, three channels remain equa
lized by the dynamic module, This module can accommodate small or larg
e channel spacings commensurate with the different channels allowable
into the wavelength demultiplexer.