Enhancing the performance of WDM systems by using TFF in hybrid amplifiers

Hybrid amplifiers with different gain bandwidths are indensible for long haul wavelength multiplexed optical communication systems in C-band and L-band. In this paper, the gain spectrum of EDFA has been broadened and flattened by cascading EDFA with TDFA along with a dielectric Interference filter (TFF). On using this configuration we have obtained an amplification bandwidth of 100 nm ranging from 1460nm to 1560 nm with a +2.5% gain deviation.