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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 2, Iss. 9 — Sep. 1, 2012
  • pp: 1286–1291

Photobleaching of photodarkening in ytterbium doped aluminosilicate fibers with 633 nm irradiation

Hrvoje Gebavi, Stefano Taccheo, Denis Tregoat, Achille Monteville, and Thierry Robin  »View Author Affiliations

Optical Materials Express, Vol. 2, Issue 9, pp. 1286-1291 (2012)

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In the present study, we examined photodarkening loss reduction in Yb3+ doped aluminosilicate fibers by utilizing 633 nm light irradiation. It is demonstrated that the final photobleaching value is intensity dependent, but the percentage of photodarkening reduction does not depend on dopant concentrations for settled bleaching intensity. Further examination was committed to explore the photobleaching starting from different photodarkening loss levels while keeping the same dopant concentration and subsequently the other way around. This approach related photobleaching with the number of photodarkening induced color centers and also showed that photobleaching was dopant concentration dependent. In all experiments an unbleachable residual loss for the bleaching powers up to ~100 W/mm2 was found. To the best of our knowledge this is the most extensive investigation of photobleaching effect.

© 2012 OSA

OCIS Codes
(140.3510) Lasers and laser optics : Lasers, fiber
(160.5690) Materials : Rare-earth-doped materials
(260.5210) Physical optics : Photoionization
(140.3615) Lasers and laser optics : Lasers, ytterbium

ToC Category:
Laser Materials

Original Manuscript: June 14, 2012
Revised Manuscript: August 8, 2012
Manuscript Accepted: August 8, 2012
Published: August 21, 2012

Hrvoje Gebavi, Stefano Taccheo, Denis Tregoat, Achille Monteville, and Thierry Robin, "Photobleaching of photodarkening in ytterbium doped aluminosilicate fibers with 633 nm irradiation," Opt. Mater. Express 2, 1286-1291 (2012)

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