High-power superfluorescent source of Yb~(3+)-doped double- cladding photonic crystal fiber

摘要

A new type of high-power broadband superfluorescent source of Yb~(3+) -doped double-cladding photonic crystal fiber is reported experimentally, which is pumped at 976 nm by a high-power laser diode with the end-coupling method. We have obtained a smooth broadband output of superfluorescence. The maximum output power is 1. 649 W with a slope efficiency of 56. 7%. The 3 dB bandwidth is 22. 4 nm. To the best of our knowledge, this is the first report about SFS with such high output power of 1.649 W.