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Proceedings Paper

Fiber Bragg reflectors by single excimer pulse
Author(s): Charles G. Askins; Glen M. Williams; Mark Bashkansky; E. Joseph Friebele
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Paper Abstract

In-fiber Bragg reflectors produced with coherent, transverse UV illumination promise to be versatile optical elements for spectral selection and distributed sensing. These fiber devices were generated by repetitive exposures to a moderate intensity, frequency-doubled dye laser under holographically stable conditions until sufficient periodic index modulation had accumulated to produce a strong reflection. Fluences in the range of 1000 J/sq cm were delivered over the course of many seconds to minutes to obtain an index modulation depth of about 1 x 10 exp -4. In an alternate approach, we used single about 1 J/sq cm pulses from a line-narrowed KrF excimer to produce gratings with a modulation depth of about 2 x 10 exp -5, and more recently have achieved values above 1 x 10 exp -4. An unanticipated benefit of the single-pulse preparation method appears to be the markedly enhanced thermal stability of the grating structure, as compared to that reported for gratings produced with multiple exposures.

Paper Details

Date Published: 26 March 1993
PDF: 6 pages
Proc. SPIE 1798, Fiber Optic Smart Structures and Skins V, (26 March 1993); doi: 10.1117/12.141323
Show Author Affiliations
Charles G. Askins, Naval Research Lab. (United States)
Glen M. Williams, Naval Research Lab. (United States)
Mark Bashkansky, Naval Research Lab. (United States)
E. Joseph Friebele, Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 1798:
Fiber Optic Smart Structures and Skins V
Richard O. Claus; Robert S. Rogowski, Editor(s)

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