Optimization of Hybrid Fiber Amplifier Utilizing Combined Serial-Parallel Configuration

In this paper, the optimum pump conditions are determined for C+L band combined serial-parallel hybrid fiber amplifier (CSP-HFA), utilizing gain control technique via OptiSystem 7.0. The optimization includes determining the optimum pump power (OPP), the optimum pump wavelength (OPW) and optimum coupling ratio (OCR), within the longest 3– dB flat gain bandwidth. The proposed HFA at optimum conditions, produced 65 nm flat gain bandwidth ranging from 1530 nm to 1595 nm within average gain of 16 dB and average NF of 7.29 dB. The proposed architecture provided two advantages over the conventional P-HFA includes; 1) improved flat gain bandwidth by 8.33 %, 2) constant optimum coupling ratio for both small and large signal at 0.7. (paper)