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Proceedings Paper

Narrowband infrared emitters for combat ID
Author(s): Martin U. Pralle; Irina Puscasu; James Daly; Keith Fallon; Peter Loges; Anton Greenwald; Edward Johnson
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Paper Abstract

There is a strong desire to create narrowband infrared light sources as personnel beacons for application in infrared Identify Friend or Foe (IFF) systems. This demand has augmented dramatically in recent years with the reports of friendly fire casualties in Afghanistan and Iraq. ICx Photonics' photonic crystal enhancedTM (PCETM) infrared emitter technology affords the possibility of creating narrowband IR light sources tuned to specific IR wavebands (near 1-2 microns, mid 3-5 microns, and long 8-12 microns) making it the ideal solution for infrared IFF. This technology is based on a metal coated 2D photonic crystal of air holes in a silicon substrate. Upon thermal excitation the photonic crystal modifies the emitted yielding narrowband IR light with center wavelength commensurate with the periodicity of the lattice. We have integrated this technology with microhotplate MEMS devices to yield 15mW IR light sources in the 3-5 micron waveband with wall plug efficiencies in excess of 10%, 2 orders of magnitude more efficient that conventional IR LEDs. We have further extended this technology into the LWIR with a light source that produces 9 mW of 8-12 micron light at an efficiency of 8%. Viewing distances >500 meters were observed with fielded camera technologies, ideal for ground to ground troop identification. When grouped into an emitter panel, the viewing distances were extended to 5 miles, ideal for ground to air identification.

Paper Details

Date Published: 14 May 2007
PDF: 5 pages
Proc. SPIE 6542, Infrared Technology and Applications XXXIII, 65422Z (14 May 2007); doi: 10.1117/12.719794
Show Author Affiliations
Martin U. Pralle, ICx Photonics (United States)
Irina Puscasu, ICx Photonics (United States)
James Daly, ICx Photonics (United States)
Keith Fallon, ICx Photonics (United States)
Peter Loges, ICx Photonics (United States)
Anton Greenwald, ICx Photonics (United States)
Edward Johnson, ICx Photonics (United States)

Published in SPIE Proceedings Vol. 6542:
Infrared Technology and Applications XXXIII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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