23 February 2006 Depressed clad hollow optical fiber with fundamental LP01 mode cut-off
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Abstract
We propose a depressed clad hollow optical fiber with fundamental (LP01) mode cut-off suitable for high power short-wavelength, especially three-level, fiber laser operation by introducing highly wavelength dependent losses at longer wavelengths. The cut-off characteristic of such fiber structure was investigated. A Yb-doped depressed clad hollow optical fiber laser generating 59.1W of output power at 1046nm with 86% of slope efficiency with respect to the absorbed pump power was realised by placing the LP01 mode cut-off at ~1100nm.
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J. Kim, J. Kim, P. Dupriez, P. Dupriez, D.B.S. Soh, D.B.S. Soh, C. Codemard, C. Codemard, S. Yoo, S. Yoo, Y. Jeong, Y. Jeong, J. Nilsson, J. Nilsson, J. K. Sahu, J. K. Sahu, } "Depressed clad hollow optical fiber with fundamental LP01 mode cut-off", Proc. SPIE 6102, Fiber Lasers III: Technology, Systems, and Applications, 61020G (23 February 2006); doi: 10.1117/12.653146; https://doi.org/10.1117/12.653146
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