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Unified theory of the temporal-spectral dynamics in ytterbium-doped fiber lasers
Author(s): Wei Liu; Pengfei Ma; Pu Zhou; Zongfu Jiang
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Paper Abstract

In this work, we establish a unified temporal-spatial model to study the temporal-spectral dynamics of Ytterbium-doped fiber lasers (YDFLs). Different from the previously reported theories, this model is capable of obtaining the temporal property of YDFLs from the relaxation oscillation region to the relative stable region in the time window of millisecond scale with the time resolution of sub-nanosecond scale. The simulation results reveal that the three temporal instabilities, i.e. sustained self-pulsing (SSP), self-mode locking (SML) and turbulence-like pulsing (TLP), coexist in a multilongitudinal mode YDFL. When the output power evolution of the YDFL is observed in different time scales, different temporal instability phenomena dominate in the observation. Along with the increase of pump power, a single regular SML pulse would gradually break up into irregular TLP pulses and the life of the SSP pulse envelop would decrease. Besides, the spectral evolution property of the YDFLs at different pump powers are given and significant spectral broadening is observed.

Paper Details

Date Published: 12 December 2018
PDF: 10 pages
Proc. SPIE 10844, Advanced Laser Technology and Applications, 1084407 (12 December 2018); doi: 10.1117/12.2503711
Show Author Affiliations
Wei Liu, National Univ. of Defense Technology (China)
Pengfei Ma, National Univ. of Defense Technology (China)
Pu Zhou, National Univ. of Defense Technology (China)
Zongfu Jiang, National Univ. of Defense Technology (China)

Published in SPIE Proceedings Vol. 10844:
Advanced Laser Technology and Applications
Shibin Jiang; Lijun Wang; Zejin Liu; Wei Shi; Pu Zhou, Editor(s)

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