P18 – The counter-propagating traveling-wave technique for optimizing a continuous-wave fiber laser presenting excited state absorption

We report results of simulation of a continuous-wave fiber laser with active medium presenting an excited state absorption. The laser was simulated using the counterpropagating traveling-wave technique with taking into account two laser waves propagating along the laser cavity in opposite directions, two waves of amplified spontaneous emission, and exited state absorption observed for both pump and laser wavelength. We show that the optimal reflection of the output selective mirror baser on a fiber Bragg grating depends on pump power and the active fiber length.