Behavior of NLO polymer modulators irradiated by gamma rays

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

doi:10.1117/12.510380

10 November 2003 Behavior of NLO polymer modulators irradiated by gamma rays

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

Author Affiliations +

Proceedings Volume 5212, Linear and Nonlinear Optics of Organic Materials III; (2003) https://doi.org/10.1117/12.510380
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

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 V_π 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 V_π 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.

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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, and Emily Heckman "Behavior of NLO polymer modulators irradiated by gamma rays", Proc. SPIE 5212, Linear and Nonlinear Optics of Organic Materials III, (10 November 2003); https://doi.org/10.1117/12.510380

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