19 August 2011 Modeling analysis of a passive coherent beam combining using fused-taper fiber laser arrays
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Abstract
Passive coherent beam combining, which uses optical feedback from the fibers to force all to lock in phase, seems to be a promising way for high power output. Fused-taper fiber laser array is one of the passive methods, in which phase locking is realized by mutual energy coupling, without any active phase control. In this paper, we use a dynamical model to express phase-locking evolution of the fused-taper fiber laser array theoretically. In the numerical analysis of 3- and 7- fused-taper fiber arrays, we start the simulations beginning with each laser in an off-state, that is, the initial electric fields are chosen at random of order 0.1 and the phases are uniformly distributed. The results show that the array can achieve a relative in-phase state. The coupling degree varies with the distance between the two neighbor fibers. The simulations also show that the fiber grating reflectivity, the pumping parameters and the coupling length have significant effect on the stability of the coherent combing.
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Jie Li, Jie Li, Wei Li, Wei Li, Jianqiu Cao, Jianqiu Cao, Zilun Chen, Zilun Chen, Hang Zhou, Hang Zhou, } "Modeling analysis of a passive coherent beam combining using fused-taper fiber laser arrays", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81922F (19 August 2011); doi: 10.1117/12.900594; https://doi.org/10.1117/12.900594
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