Residual pump light as a probe of self-pulsing instability in an ytterbium-doped fiber laser.
Self-pulsing instability in the ytterbium-doped fiber (YDF) laser is investigated with the pump-bypassed cavity configuration. The residual pump light acts as a probe of the intracavity dynamics, and the temporal behavior of the light shows correlations with the self-mode locking instability in the original cavity and the sustained self-pulsing instability in the modified cavity of the YDF laser. The results suggest that the interactions among stimulated emission, pump absorption and/or reabsorption could account for self-pulsing instability in the YDF laser. The pump-bypassed laser cavity configuration can be used to investigate the instabilities of various kinds of fiber lasers.
Li
Jianlang
J
Institute for Laser Science, University of Electro-Communications, Tokyo, Japan. j_li@ils.uec.ac.jp
Ueda
Ken-ichi
K
Musha
Mitsuru
M
Shirakawa
Akira
A