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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 4 — Feb. 1, 1999
  • pp: 619–627

High-efficiency Bragg gratings in photothermorefractive glass

Oleg M. Efimov, Leonid B. Glebov, Larissa N. Glebova, Kathleen C. Richardson, and Vadim I. Smirnov  »View Author Affiliations


Applied Optics, Vol. 38, Issue 4, pp. 619-627 (1999)
http://dx.doi.org/10.1364/AO.38.000619


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Abstract

Photosensitive silicate glasses doped with silver, cerium, fluorine, and bromine were fabricated at the Center for Research and Education in Optics and Lasers. Bragg diffractive gratings were recorded in the volume of these glasses with a photothermorefractive process (exposure to UV radiation of a He–Cd laser at 325 nm is followed by thermal development at 520 °C). Absolute diffraction efficiency of as much as 93% was observed for 1-mm-thick gratings with spatial frequencies up to 2500 mm-1. No decreasing of diffraction efficiency was detected at low spatial frequencies. Original glasses were transparent (absorption coefficient less than 1 cm-1) from 350 to 4100 nm. Induced losses in exposed and developed glass decreased from 0.3 to 0.03 cm-1 between 400 and 700 nm, respectively, and did not exceed 0.01–0.02 cm-1 in the IR region from 700 to 2500 nm. Additional losses caused by parasitic structures recorded in the photosensitive medium were studied.

© 1999 Optical Society of America

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(090.2900) Holography : Optical storage materials
(160.2750) Materials : Glass and other amorphous materials

History
Original Manuscript: August 31, 1998
Revised Manuscript: November 9, 1998
Published: February 1, 1999

Citation
Oleg M. Efimov, Leonid B. Glebov, Larissa N. Glebova, Kathleen C. Richardson, and Vadim I. Smirnov, "High-efficiency Bragg gratings in photothermorefractive glass," Appl. Opt. 38, 619-627 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-4-619

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