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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 7, Iss. 4 — Apr. 1, 2009
  • pp: 348–351

Photosensitivity and photoluminescence of Sn/Yb codoped silica optical fiber preform

Guanghui Chen, Yigang Li, Yaoji He, Liying Liu, Lei Xu, and Wencheng Wang  »View Author Affiliations


Chinese Optics Letters, Vol. 7, Issue 4, pp. 348-351 (2009)


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Abstract

Sn/Yb codoped silica optical fiber preform is prepared by the modified chemical vapor deposition (MCVD) followed by the solution-doping method. Ultraviolet (UV) optical absorption, photoluminescence (PL) spectra under 978-nm laser diode (LD) pumping, and refractive index change after exposure to 266-nm laser pulses are obtained. There is only a little change in the PL spectra while a positive refractive index change up to 2\times10^{-4} is observed after 30-min exposure to 266-nm laser pulses. The results show that both of the peculiar photosensitivity of Sn-doped silica and the gain property of Yb-doped silica fiber are preserved in the Sn/Yb codoped silica optical fiber preform. The experimental data suggest that the photosensitivity of the fiber preform under high energy density laser irradiation should be mainly due to the bond-breaking of oxygen deficient defects, while under relatively low energy density laser irradiation, the refractive index change probably originates from the photoconversion of optically active defects.

© 2009 Chinese Optics Letters

OCIS Codes
(160.5690) Materials : Rare-earth-doped materials
(060.3738) Fiber optics and optical communications : Fiber Bragg gratings, photosensitivity
(160.5335) Materials : Photosensitive materials

Citation
Guanghui Chen, Yigang Li, Yaoji He, Liying Liu, Lei Xu, and Wencheng Wang, "Photosensitivity and photoluminescence of Sn/Yb codoped silica optical fiber preform," Chin. Opt. Lett. 7, 348-351 (2009)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-7-4-348


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