5 September 2002 New inner cladding shape for high-power double-clad fiber lasers
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In this paper, We have proposed a new cross section shape of inner cladding benefited from the conception of unsteady cavity in laser technology. The absorption characteristic of this new type double-clad fiber is analyzed in detail with ray tracing method. For this new type and rectangular double-clad fibers, with core diameter 8im and pump area 100?mX 100?m, about 98% pumped propagation rays are absorbable after 100 times reflection in the inner cladding, so it is possible to achieve very high absorption efficiency. However, for circular, offset and D shape double-clad fibers, with same core diameter and pump area above, only 10%, 50%,80% pumped propagation rays are absorbable.
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Jun Zhou, Jun Zhou, Qihong Lou, Qihong Lou, Tiejun Li, Tiejun Li, Zhijiang Wang, Zhijiang Wang, Jingxing Dong, Jingxing Dong, Runrong Wei, Runrong Wei, "New inner cladding shape for high-power double-clad fiber lasers", Proc. SPIE 4914, High-Power Lasers and Applications II, (5 September 2002); doi: 10.1117/12.481784; https://doi.org/10.1117/12.481784


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