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Proceedings Paper

Modeling of compact Pd coated VCSELs for hydrogen sensing
Author(s): Chris Edwards; Lynford L. Goddard
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Paper Abstract

We report on designs for compact VCSEL sensors for use in hydrogen gas detection. We discuss 980nm VCSELs coated with Pd, which has been proven to react with hydrogen. During this reaction, the device undergoes hydrogen induced lattice expansion (HILE) which causes two distinct effects that can be detected at the output. These two effects are a red-shift in the emission wavelength and a decrease in the output power. The compact VCSELs will be positioned into a 2D array with varying mesa diameters and palladium thickness in order to distinguish and track the specific level of hydrogen present in the atmosphere.

Paper Details

Date Published: 7 February 2011
PDF: 9 pages
Proc. SPIE 7952, Vertical-Cavity Surface-Emitting Lasers XV, 79520E (7 February 2011); doi: 10.1117/12.874235
Show Author Affiliations
Chris Edwards, Univ. of Illinois at Urbana-Champaign (United States)
Lynford L. Goddard, Univ. of Illinois at Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 7952:
Vertical-Cavity Surface-Emitting Lasers XV
James K. Guenter; Chun Lei, Editor(s)

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