Abstract
We report a neodymium-doped all-solid silicate glass photonic bandgap fiber which enhances three-level laser transition F-4(3/2)-I-4(9/2) (890-940 nm) by suppressing the four-level laser transition F-4(3/2)-I-4(11/2) (1000-1100 nm) using the bandgap effect. The laser output was not obtained due to the low absorbed pump power, but our result provides a new method for a new wavelength band fiber laser.
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