Alleviate photo darkening by single-mode RMO fiber design

Kent E. Mattsson, Jes Broeng

Research output: Contribution to journalConference articleResearchpeer-review


In this work we propose and demonstrate a single mode fiber design that alleviates photo darkening. The fiber design is based on a reduced signal mode to gain material overlap which is found to reduce the induced losses of PD. For the fiber, saturated photo darkening operation is observed after 1500 hours operation with less than 7 % reduction in slope efficiency from 350 W output power in Yb/Al co-doped material. Power scalability up to 5 kW of the RMO fiber design is theoretically predicted.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Pages (from-to)758024
Number of pages8
Publication statusPublished - 2010
Externally publishedYes
EventFiber Lasers VII: Technology, Systems and Applications : Therapeutic Laser Applications and Laser-Tissue Interactions - San Francisco, CA, United States
Duration: 23 Jan 201028 Jan 2010
Conference number: 7


ConferenceFiber Lasers VII: Technology, Systems and Applications
Country/TerritoryUnited States
CitySan Francisco, CA
OtherSPIE volume 7580


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