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Proceedings Paper

Photostability and residual red-tail absorption of different chromophore-doped polymers
Author(s): Michael Canva; A. Galvan-Gonzalez; George I. Stegeman; Robert J. Twieg; P. Chan; Tony C. Kowalczyk; H. Lackritz
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Paper Abstract

Doped polymers exhibit many attractive features for nonlinear optics. The performance demonstrated with some of these materials appears promising for application in real devices. However, the Achilles' heel of this class of chromophore-doped materials lies most certainly in their relatively modest chemical stability, especially their photostability. Our aim has been to quantify such side- effect phenomenon, systematically linked to the optical use of these materials. Photodegradation is a 2-step process: first, absorption, that may be characterized by (sigma) ((lambda) ), the absorption cross section, and, second, chemical reactivity from the induced excited-states, which may be quantified by B-1((lambda) ), the overall quantum efficiency of degradation. The photodegradation rate under a photon flux n is thus given by (tau) =B/((sigma) .n). We use the quantity C=B/(sigma) as a material figure of merit for photostability. Given long enough illumination times, C can always be measured. How precisely B is quantified is directly related to how precisely (sigma) is measured, which decreases dramatically as the wavelength of interest is shifted from the main absorption band towards the IR telecommunication spectral windows. Increasing future device lifetimes requires a simultaneous increase in the B parameter and a decrease in the loss due to the residual red-tail absorption. We report the systematic behavior that was found concerning the dependence of C on wavelength.

Paper Details

Date Published: 29 November 2000
PDF: 11 pages
Proc. SPIE 4106, Linear, Nonlinear, and Power-Limiting Organics, (29 November 2000); doi: 10.1117/12.408496
Show Author Affiliations
Michael Canva, Univ. d'Orsay-Paris XI (France)
A. Galvan-Gonzalez, CREOL/Univ. of Central Florida (United States)
George I. Stegeman, CREOL/Univ. of Central Florida (United States)
Robert J. Twieg, Kent State Univ. (United States)
P. Chan, Molecular OptoElectronics Corp. (United States)
Tony C. Kowalczyk, Gemfire Corp. (United States)
H. Lackritz, Gemfire Corp. (United States)

Published in SPIE Proceedings Vol. 4106:
Linear, Nonlinear, and Power-Limiting Organics
Manfred Eich; Christopher M. Lawson; Mark G. Kuzyk; Manfred Eich; Mark G. Kuzyk; Christopher M. Lawson; Robert A. Norwood, Editor(s)

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