793 nm pump induced photo-bleaching of photo-darkened Yb^3+-doped fibers

• DOI: 10.1364/oe.23.025272
• Publication Date: 2015-09-17T16:45:38Z
• Authors: N. Zhao; Y. B. Xing; J. M. Li; L. Liao; Y. B. Wang; J. G. Peng; L. Y. Yang; N. L. Dai; H. Q. Li; J. Y. Li
• Keywords: Cladding (metalworking)

We report on the strong photo-bleaching of photo-darkening (PD) induced loss under cladding pump a 793 nm laser diode (LD) in double clad Yb-doped fibers. Up to 68% PD at 810 was bleached. The bleaching rates different powers show that higher power corresponds more bleached within same time. Moreover, repeatable processes and were observed when alternately pumped with 915 LDs. Furthermore, it found simultaneously pumping fiber LDs can suppress about 80% loss, compared only LD. mechanism also discussed.