Optics and Photonics Society of Iran

Abstract- In this paper, output spectrum of the random distributed feedback fiber laser that is considered as one of the modern and the most attractive lasers, is simulated. At first, the power balance equations with continuous input power and constant gain coefficient are solved and pump power evolution is obtained. Then, by including the Raman gain spectrum in the wavelength-dependent power balance equations, output spectrum is calculated and changes of output spectrum bandwidth for different input powers, are shown. Finally, dependence of backward total output power on the input power is investigated. The results show that as the input pump power is increased, the width of the output spectrum is decreased.