Journal
OPTICS COMMUNICATIONS
Volume 208, Issue 4-6, Pages 381-389Publisher
ELSEVIER
DOI: 10.1016/S0030-4018(02)01587-0
Keywords
high power fibre lasers; dynamics; self-pulsing; nonlinear effects
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Observations are presented on the self-pulsing behaviour of the Tm3+-doped silica fibre laser operating near 2 mum. Various self-pulsing regimes are observed for a range of pumping rates when the fibre is end-pumped with a high power Nd:YAG laser operating at 1.319 mum in a linear bidirectional cavity. A rich variety of nonlinear phenomena, ranging from self-pulsing to self-Q-switching and to a modulated quasi-CW wave. are observed. The phenomenon of pair-induced quenching (PIQ) is considered, compatible with excited-state absorption (ESA). The influence of thulium concentration on ion-pair production is described. The model developed based on the rate equations for a three-level system describes the experimental observations. (C) 2002 Elsevier Science B,V. All rights reserved.
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