26 February 2013 Microstructured cladding elements to enhance the performance of large mode area leakage channel fibers
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Abstract
Large mode area fibers are imperative for scaling up the peak and average power of fiber lasers. Single-mode behavior and low FM loss are the crucial functionalities for these fibers. While rod-type Photonic Crystal Fibers (PCFs) have been very successful in offering large mode areas, the typical device length requirement (~1m) and rigid configuration limits their attractiveness for practical applications. LMA fibers offering a degree of bend tolerance are thus highly desired. Leakage channel fibers (LCFs) have shown a great potential for offering substantial bend tolerance along with large mode areas. However, the proposed use of Fluorine-doped rods in the all-solid version limits their practical design space. Here, we propose a novel design concept to attain single-material, large mode area fibers (mode area >~1000μm2) with effectively single mode operation coupled with bending characteristics comparable to all-solid LCFs and, at the same time, greater design flexibility and easier splicing relative to rod-type PCFs.
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Sonali Dasgupta, Sonali Dasgupta, John R. Hayes, John R. Hayes, Catherine Baskiotis, Catherine Baskiotis, David J. Richardson, David J. Richardson, } "Microstructured cladding elements to enhance the performance of large mode area leakage channel fibers", Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 86012R (26 February 2013); doi: 10.1117/12.2004242; https://doi.org/10.1117/12.2004242
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