Lasing of surface-polished polycrystalline Ho: YAG (yttrium aluminum garnet) fiber.

Hyunjun Kim,Randall S Hay,Sean A McDaniel,Gary Cook,Nicholas G Usechak,Augustine M Urbas,Kathleen N Shugart,HeeDong Lee,Ali H Kadhim,Dean P Brown,Benjamin Griffin,Geoff E Fair,Randall G Corns,Santeri A Potticary,Frank K Hopkins,Kent L Averett,David E Zelmon,Triplicane A Parthasarathy,Kristin A Keller

OPTICS EXPRESS（2017）

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摘要

A polycrystalline 1.5% Ho: YAG fiber with a diameter of 31 mu m was prepared. Surface roughness from grain boundary grooving was reduced by polishing, which decreased the fiber scattering coefficient from 76 m(-1) to 35 m(-1). Lasing tests were done on this fiber with a SF57 Schott glass cladding. Lasing was confirmed by spectrum narrowing with threshold pump power lower than 500 mW and a slope efficiency of 7%. To our knowledge, this is the first lasing demonstration from a small diameter polycrystalline ceramic fiber. (C) 2017 Optical Society of America

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关键词

yttrium aluminum garnet,polycrystalline ho,fiber,surface-polished

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