Title :
A novel efficient optimal design method for gain-flattened multiwavelength pumped fiber Raman amplifier
Author :
Cui, Sheng ; Liu, Jinsong ; Ma, Xiaoming
Author_Institution :
Inst. of Tech. Phys., Xidian Univ., Shanxi, China
Abstract :
In this letter, it is revealed that there exits an approximate linear relation between the changes in input pump powers and the resulting changes in the pump-power integrals in multiwavelength pumped fiber Raman amplifiers (MW-FRAs). Based on this fact, a novel efficient optimal design method for gain-flattened MW-FRAs is proposed. First, the optimal integral pump spectrum is found by genetic algorithm. Then, the matrix denoting the linear many-to-many relation is calculated. By this matrix, the optimal input pump powers resulting in the optimal pump-power integrals can be easily calculated. The optimal pump spectrum is obtained without time consuming trial-error adjustments or many times numerical simulations. Compared to other existing optimal design methods, our method has a substantial improvement in the efficiency without any expense of accuracy.
Keywords :
Raman lasers; genetic algorithms; optical communication equipment; optical design techniques; optical fibre amplifiers; optical fibre communication; optical pumping; fiber Raman amplifier; gain-flattened Raman amplifier; multiwavelength pumped Raman amplifier; optical fiber communication; optimal design method; optimal pump spectrum; pump-power integrals; trial-error adjustments; Design methodology; Genetic algorithms; Linear approximation; Numerical simulation; Optical fiber amplifiers; Optical fiber communication; Optical fibers; Power amplifiers; Raman scattering; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.835637
