Mitigation of photodegradation in 790nm-pumped Tm-doped fibers

G. Frith*, A. Carter, B. Samson, J. Faroni, K. Farley, K. Tankala, G. E. Town

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

25 Citations (Scopus)


The capability of Tm-doped silica fibers pumped at 790nm to efficiently produce high power emission in the 1.9~2.1μm region has been well documented to date but little has been presented on the reliability of this technology. Early experiments highlighted that photodarkening can be a significant concern when Tm-doped silica fibers are exposed to high intensity blue light. We present a discussion of the processes responsible for the production of blue light in Tmdoped fibers pumped at 790nm and how fiber composition influences these processes. Through optimization of fiber composition we have demonstrated highly efficient lasers exhibiting less than 1% output power degradation per thousand hours.

Original languageEnglish
Title of host publicationFiber Lasers VII
Subtitle of host publicationTechnology, Systems, and Applications
EditorsKanishka Tankala, Jay W. Dawson
Place of PublicationBellingham, WA
Pages75800A-1 - 75800A-9
Number of pages9
ISBN (Print)9780819479761
Publication statusPublished - 2010
EventFiber Lasers VII: Technology, Systems, and Applications - San Francisco, CA, United States
Duration: 25 Jan 201028 Jan 2010

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X


OtherFiber Lasers VII: Technology, Systems, and Applications
Country/TerritoryUnited States
CitySan Francisco, CA


  • Fiber laser
  • Photodarkening
  • Photodegradation
  • Thulium


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