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Proceedings Paper

Behavior of NLO polymer modulators irradiated by gamma rays
Author(s): Edward W. Taylor; James E. Nichter; Fazio Nash; Richard J. Michalak; Franz Haas; Paul M. Payson; P. Cook; Thomas E. McEwan; B. McKeon; Attila A. Szep; B. Flushe; Andrew R. Pirich; George A. Brost; James G. Grote; John S. Zetts; Perry P. Yaney; Emily Heckman
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Paper Abstract

Two second-order nonlinear optical chromophoric materials were investigated for their response to gamma-ray irradiations for doses ranging from approximately 10-104 krad(Si). Thin film polymer modulators composed of a mixture of amorphous polycarbonate and phenyltetraene [APC/CLD-1(CPW-1)] active regions with UV upper and lower UV claddings were investigated for their pre- and post-irradiation behavior. Modulator Vπ insertion loss, and extinction ratio responses were examined, while a blend of salmon deoxyribonucleic acid (DNA)- hexadeCetylTriMethylAmmonium Chloride (CTMA) film samples were studied for their spectral response following irradiations over the spectral range λ=240-2600 nm. Following irradiation ranging from 9.6-104 krad(Si), the DNA/CTMA films exhibited losses in transmissivity over the spectral range λ=882-2600 nm and increased transmissivity over portions of the 240 nm < λ < 882 nm band. Data from the study also suggested that strongly poled APC/CPW-1 modulators operating at λ=1550 nm and exhibiting low Vπ values were less likely to have their half-wave voltages affected by ionizing radiation. The optical insertion losses for the majority of the APC/CPW-1 irradiated mdolators were found to decrease following irradiation. Discussion of the experimental results and mechanisms believed responsible for the post-irradiation behavior and results are presented.

Paper Details

Date Published: 10 November 2003
PDF: 11 pages
Proc. SPIE 5212, Linear and Nonlinear Optics of Organic Materials III, (10 November 2003); doi: 10.1117/12.510380
Show Author Affiliations
Edward W. Taylor, International Photonics Consultants, Inc. (United States)
James E. Nichter, Air Force Research Lab. (United States)
Fazio Nash, Air Force Research Lab. (United States)
Richard J. Michalak, Air Force Research Lab. (United States)
Franz Haas, Air Force Research Lab. (United States)
Paul M. Payson, Air Force Research Lab. (United States)
P. Cook, Air Force Research Lab. (United States)
Thomas E. McEwan, Air Force Research Lab. (United States)
B. McKeon, Air Force Research Lab. (United States)
Attila A. Szep, Air Force Research Lab. (United States)
B. Flushe, Air Force Research Lab. (United States)
Andrew R. Pirich, Air Force Research Lab. (United States)
George A. Brost, Air Force Research Lab. (United States)
James G. Grote, Air Force Research Lab. (United States)
John S. Zetts, Air Force Research Lab. (United States)
Perry P. Yaney, Univ. of Dayton (United States)
Emily Heckman, Univ. of Dayton (United States)


Published in SPIE Proceedings Vol. 5212:
Linear and Nonlinear Optics of Organic Materials III
Mark G. Kuzyk; Manfred Eich; Robert A. Norwood, Editor(s)

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