We report an approach to the control of the longitudinal mode structure in erbium-doped fiber lasers that uses saturable absorbers and the spatial hole-burning effect in the laser cavity. Two- and three-mode fiber lasers are successfully demonstrated, and the laser output properties are compared with theoretical calculations.
© 1996 Optical Society of America
Hyo Sang Kim, Seung Kwan Kim, and Byoung Yoon Kim, "Longitudinal mode control in few-mode erbium-doped fiber lasers," Opt. Lett. 21, 1144-1146 (1996)