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Proceedings Paper

Optical power limiting for eye protection from tunable lasers
Author(s): C. H. Winston Chen; Valeri V. Golovlev; W. R. Garrett; Robert V. Goedert; Thomas A. Whittaker III; Douglas W. Templeton
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Paper Abstract

Due to the extensive use of lasers in aiming devices, range fmders, and in remote sensing, the protection of eyes and sensors from laser beams becomes critically important. It has been a challenging task to provide protection from wave-length tunable lasers without the serious sacrifice of vision capability. In this work, we describe two different approaches which can significantly attenuate the laser beam through the whole visible region. One approach is to use specific geometric configuration with thin film aluminum mirrors"2. The other is to use the properties of reverse saturable absorption of fullerene3'4. The combination of these two approaches can possibly become an effective device for eye protection from high power tunable lasers. The principle and mechanism to achieve eye protection will also be discussed. The goal for eye and sensor protection is to attenuate the amount of incident light below the damage threshold. The ANSI standards indicate that for visible wavelengths and nanosecond pulse durations, the maximum permissible exposure on the surface of the comeas is about 0.2 J. The damage threshold by a nanosecond laser on a rhesus monkey was measured to be of the order of a few microjoules5.

Paper Details

Date Published: 10 October 1997
PDF: 6 pages
Proc. SPIE 3146, Nonlinear Optical Liquids and Power Limiters, (10 October 1997); doi: 10.1117/12.284163
Show Author Affiliations
C. H. Winston Chen, Oak Ridge National Lab. (United States)
Valeri V. Golovlev, Oak Ridge National Lab. (United States)
W. R. Garrett, Oak Ridge National Lab. (United States)
Robert V. Goedert, U.S. Army Tank-Automotive Command (United States)
Thomas A. Whittaker III, U.S. Army Tank-Automotive Command (United States)
Douglas W. Templeton, U.S. Army Tank-Automotive Command (United States)

Published in SPIE Proceedings Vol. 3146:
Nonlinear Optical Liquids and Power Limiters
Christopher M. Lawson, Editor(s)

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