25 February 2008 Measurement of high-photodarkening resistance in phosphate fiber doped with 12% Yb2O3
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Abstract
We report the measurement of photodarkening in single-mode phosphate fibers with a Yb3+ concentrations of 7.1 × 1026 m-3 and 1.42 × 1027 m-3 (6 wt.% and 12 wt.% Yb2O3).We compare the photodarkening resistance of these phosphate fibers with that of three single-mode Yb3+-doped silica fibers. Our data shows that under strong pumping conditions, phosphate fibers allow Yb3+ concentrations that are least 6 times greater than the most photodarkening-resistant silica fibers to date without the onset of photodarkening at 660 nm.
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Y. W. Lee, Y. W. Lee, S. Sinha, S. Sinha, M. J. F. Digonnet, M. J. F. Digonnet, R. L. Byer, R. L. Byer, S. Jiang, S. Jiang, } "Measurement of high-photodarkening resistance in phosphate fiber doped with 12% Yb2O3", Proc. SPIE 6873, Fiber Lasers V: Technology, Systems, and Applications, 68731D (25 February 2008); doi: 10.1117/12.774938; https://doi.org/10.1117/12.774938
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