Estimation of mode instability threshold based on local thermal load

Yanshan Wang; Weiwei Ke; Yinhong Sun; Qinyong Liu; Wanjing Peng; Congwen Zha; Tenglong Li; Yi Ma; Chun Tang

doi:10.1117/12.2284476

24 October 2017 Estimation of mode instability threshold based on local thermal load

Yanshan Wang, Weiwei Ke, Yinhong Sun, Qinyong Liu, Wanjing Peng, Congwen Zha, Tenglong Li, Yi Ma, Chun Tang

Proceedings Volume 10457, AOPC 2017: Laser Components, Systems, and Applications; 104571R (2017) https://doi.org/10.1117/12.2284476
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China

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.

Citation Download Citation

Yanshan Wang, Weiwei Ke, Yinhong Sun, Qinyong Liu, Wanjing Peng, Congwen Zha, Tenglong Li, Yi Ma, and Chun Tang "Estimation of mode instability threshold based on local thermal load", Proc. SPIE 10457, AOPC 2017: Laser Components, Systems, and Applications, 104571R (24 October 2017); https://doi.org/10.1117/12.2284476

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