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Femtosecond to Nanosecond Characterization of Optical Limiting Mechanisms in Power Limiting Liquids and Solids

Published online by Cambridge University Press:  10 February 2011

A. Malko ,
S. Xu ,
H-L. Wang ,
R. Kohlman ,
L. Smilowitz ,
V. Klimov ,
D. W. McBranch ,
J.-L. Nogues ,
W. Moreshead  and
D. Hagan
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A. Malko
Affiliation:
Chemical Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
S. Xu
Affiliation:
Chemical Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
H-L. Wang
Affiliation:
Chemical Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
R. Kohlman
Affiliation:
Chemical Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
L. Smilowitz
Affiliation:
Chemical Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
V. Klimov
Affiliation:
Chemical Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
D. W. McBranch
Affiliation:
Chemical Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM 87545
J.-L. Nogues
Affiliation:
GELTECH, Inc., Orlando, FL 32826
W. Moreshead
Affiliation:
GELTECH, Inc., Orlando, FL 32826
D. Hagan
Affiliation:
CREOL, University of Central Florida, Orlando, FL 32816
S. Yang
Affiliation:
CREOL, University of Central Florida, Orlando, FL 32816
E. Van Stryland
Affiliation:
CREOL, University of Central Florida, Orlando, FL 32816
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Abstract

We present our recent advances toward the development of high-performance solid-state optical limiting devices using reverse saturable absorption (RSA) dyes doped into optical host materials. Femtosecond transient absorption spectroscopy was employed to determine both the spectral regions of strong RSA, and the singlet-triplet excited-state dynamics. The optical limiting in the visible spectrum in both metallo-phthalocyanines and metallo-porphyrins is due to a combination of singlet and triplet RSA. Optical limiting performance was studied for RSA dyes in dual tandem limiters (both in solution and solid-state). Our best results in the solid-state yielded an attenuation of 400x, and a damage threshold of up to several mJ at f/5 focusing. The optical limiting at f/5 is further enhanced, particularly in the solid-state, by self-defocusing thermal nonlinearities.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 597: Symposium PP – Thin Films for Optical Waveguide Devices & Materials … , 1999 , 437
Copyright
Copyright © Materials Research Society 2000

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