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  • Vol. 24, Iss. 15 — Aug. 1, 1999
  • pp: 1023–1025

Enhanced photosensitivity in germanosilicate fibers exposed to CO2 laser radiation

G. Brambilla, V. Pruneri, L. Reekie, and D. N. Payne  »View Author Affiliations


Optics Letters, Vol. 24, Issue 15, pp. 1023-1025 (1999)
http://dx.doi.org/10.1364/OL.24.001023


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Abstract

We report a novel method to increase the UV photosensitivity of GeO2: SiO2 optical fibers based on exposure to CO2 laser irradiation before grating writing. Fibers treated with a CO2 laser can produce gratings with refractive-index modulation two times greater and a Bragg wavelength that can be 2 nm longer than those of untreated fibers. Experiments on GeO2: SiO2 preform samples treated with a CO2 laser in a way similar to the fibers showed a marked increase of the 242-nm absorption band, which is associated with an increase of germanium oxygen-deficient centers and is believed to be responsible for the higher photorefractive response.

© 1999 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(060.2310) Fiber optics and optical communications : Fiber optics
(160.5320) Materials : Photorefractive materials
(260.7190) Physical optics : Ultraviolet

Citation
G. Brambilla, V. Pruneri, L. Reekie, and D. N. Payne, "Enhanced photosensitivity in germanosilicate fibers exposed to CO2 laser radiation," Opt. Lett. 24, 1023-1025 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-15-1023


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