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A simulated annealing algorithm is adopted to design multiple-pump Raman fiber amplifiers. A demonstration of the optical fiber Raman amplifier using five laser diode pumps with different wavelengths and powers is presented. The automatic configuration of the pump gives an amplification bandwidth of more than 50 nm (64 signal channels), with a fluctuation of less than 1.8 dB. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 434–436, 2001. [ABSTRACT FROM AUTHOR]

Abstract: Complex nonlinear interaction between pumps and signals of distributed optical Raman amplifiers employing wavelength-division-multiplexed pumps makes the readjustment of the pump powers difficult. In this paper, a novel method of fast pump power adjustment is proposed. Theoretical analysis and related expressions are presented. Simulation results show that satisfying gain profile can be obtained within a few seconds on a commercial personal computer (Intel Pentium 4 or compatible). [Copyright &y& Elsevier]