26 February 2013 Thermal effect-resilient design of large mode area double-cladding Yb-doped photonic crystal fibers
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Abstract
The effects of thermally-induced refractive index change on the guiding properties of different large mode area fibers have been numerically analyzed. A simple but accurate model has been applied to obtain the refractive index change in the fiber cross-section, and a full-vector modal solver based on the finite-element method has been used to calculate the guided modes of the fibers operating at high power levels. The results demonstrate that resonant structures added to the fiber cross-section can be exploited to provide efficient suppression of high-order modes with a good resilience to thermal effects.
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Enrico Coscelli, Federica Poli, Mette M. Jørgensen, Thomas T. Alkeskjold, Lasse Leick, Jes Broeng, Michele Sozzi, Alessandro Candiani, Annamaria Cucinotta, Stefano Selleri, "Thermal effect-resilient design of large mode area double-cladding Yb-doped photonic crystal fibers", Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 86012O (26 February 2013); doi: 10.1117/12.2004048; https://doi.org/10.1117/12.2004048
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