Thermal Stability of Photosensitive Bragg Gratings in Sputter-Deposited Germanosilicate Glass

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Description

The thermal stability of photo-imprinted Bragg gratings formed in reactive-atmosphere, RF-magnetron sputtered germanosilicate thin films was evaluated in terms of point defect modifications observed during isochronal annealing. Optical and magnetic spectroscopes were utilized to evaluate structural relaxation in these sputtered glasses on both a local and medium-range size scale. Depending upon the substrate temperature used during deposition, significant structural rearrangement was found to occur with increasing post-deposition anneal temperature to 600 C. This resulted in changes in the photobleaching response of the material itself as the identity of optically active structural defects evolved. Based on a color center model for ... continued below

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46 p.

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POTTER JR.,BARRETT G.; POTTER,KELLY SIMMONS & DUNBAR,TIMOTHY D. July 24, 2000.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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The thermal stability of photo-imprinted Bragg gratings formed in reactive-atmosphere, RF-magnetron sputtered germanosilicate thin films was evaluated in terms of point defect modifications observed during isochronal annealing. Optical and magnetic spectroscopes were utilized to evaluate structural relaxation in these sputtered glasses on both a local and medium-range size scale. Depending upon the substrate temperature used during deposition, significant structural rearrangement was found to occur with increasing post-deposition anneal temperature to 600 C. This resulted in changes in the photobleaching response of the material itself as the identity of optically active structural defects evolved. Based on a color center model for photosensitivity in these materials and measured changes in optical absorption with annealing, the thermal stability of a photo-imprinted Bragg grating was modeled. Good qualitative agreement with experiment was observed.

Physical Description

46 p.

Notes

OSTI as DE00759976

Medium: P; Size: 46 pages

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  • Journal Name: Journal of Non-Crystalline Solids; Other Information: Submitted to Journal of Non-Crystalline Solids

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  • Report No.: SAND2000-1797J
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 759976
  • Archival Resource Key: ark:/67531/metadc709071

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  • July 24, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 12, 2017, 6:50 p.m.

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POTTER JR.,BARRETT G.; POTTER,KELLY SIMMONS & DUNBAR,TIMOTHY D. Thermal Stability of Photosensitive Bragg Gratings in Sputter-Deposited Germanosilicate Glass, article, July 24, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc709071/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.