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Proceedings Paper

Estimation of mode instability threshold based on local thermal load
Author(s): Yanshan Wang; Weiwei Ke; Yinhong Sun; Qinyong Liu; Wanjing Peng; Congwen Zha; Tenglong Li; Yi Ma; Chun Tang
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Paper Abstract

The behavior of the mode instability (MI) threshold in the double cladding Yb-doped fiber amplifier when the amplifier with different local heat load is studied theoretically and experimentally. A theoretical model is constructed, and the effects of different laser parameters on the local thermal load of the gain fiber are analyzed theoretically, such as pump direction, pump linewidth, thermal conductivity of cooling medium. An experimental structure is described. The effects of different local heat load on the MI threshold when the fiber amplifier have the same total or average heat load is studied. The theoretical and experimental results reveal that the MI threshold can be estimated by the local heat load of the gain fiber.

Paper Details

Date Published: 24 October 2017
PDF: 10 pages
Proc. SPIE 10457, AOPC 2017: Laser Components, Systems, and Applications, 104571R (24 October 2017); doi: 10.1117/12.2284476
Show Author Affiliations
Yanshan Wang, China Academy of Engineering Physics (China)
Weiwei Ke, China Academy of Engineering Physics (China)
Yinhong Sun, China Academy of Engineering Physics (China)
Qinyong Liu, China Academy of Engineering Physics (China)
Wanjing Peng, China Academy of Engineering Physics (China)
Congwen Zha, China Academy of Engineering Physics (China)
Tenglong Li, China Academy of Engineering Physics (China)
Yi Ma, China Academy of Engineering Physics (China)
Chun Tang, China Academy of Engineering Physics (China)


Published in SPIE Proceedings Vol. 10457:
AOPC 2017: Laser Components, Systems, and Applications
Shibin Jiang; Lijun Wang; Lan Jiang; Long Zhang, Editor(s)

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