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Proceedings Paper

Laser damage threshold of gelatin and copper phthalocyanine-doped gelatin optical limiter
Author(s): Mark C. Brant; Daniel G. McLean; Richard L. Sutherland; Michael E. De Rosa; Angela L. Campbell; Silvia Martinez
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Paper Abstract

We demonstrate optical limiting in a unique guest-host system which uses neither the typical liquid or solid host. Instead, we dope a gelatin gel host with a water soluble Copper (II) phthalocyaninetetrasulfonic acid, tetrasodium salt (CuPcTs). We report on the gelatin's viscoelasticity, laser damage threshold, and self healing of this damage. The viscoelastic gelatin has mechanical properties quite different than a liquid or solid. Our laser measurements demonstrate that the single shot damage threshold of the undoped gelatin host increases with decreasing gelatin concentration. The gelatin also has a much higher laser damage threshold than a stiff acrylic. Unlike brittle solids, the soft gelatin self heals from laser induced damage. Optical limiting test also show the utility of a gelatin host doped with CuPcTs. The CuPcTs/gelatin matrix is not damaged at incident laser energies 5 times the single shot damage threshold of the gelatin host. However, at this high laser energy the CuPcTs is photo bleached at the beam waist. We report photo bleached sites by annealing the CuPcTs/gelatin matrix.

Paper Details

Date Published: 27 May 1996
PDF: 8 pages
Proc. SPIE 2714, 27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995, (27 May 1996); doi: 10.1117/12.240383
Show Author Affiliations
Mark C. Brant, Science Applications International Corp. (United States)
Daniel G. McLean, Science Applications International Corp. (United States)
Richard L. Sutherland, Science Applications International Corp. (United States)
Michael E. De Rosa, Air Force Wright Lab. (United States)
Angela L. Campbell, Air Force Wright Lab. (United States)
Silvia Martinez, Central State Univ. (United States)


Published in SPIE Proceedings Vol. 2714:
27th Annual Boulder Damage Symposium: Laser-Induced Damage in Optical Materials: 1995
Harold E. Bennett; Arthur H. Guenther; Mark R. Kozlowski; Brian Emerson Newnam; M. J. Soileau, Editor(s)

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