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Proceedings Paper

Squint compensation for a broadband RF array spectral imager using spatial spectral holography
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Paper Abstract

We present a proof-of-concept optical experiment that demonstrates the ability to record squinted broadband RF images formed by a Fourier beamforming phased-array antenna and subsequent squint correction using spatial spectral holography. A cryogenically cooled inhomogeneously broadened absorber (Tm3+:YAG) acts as a spectrally selective holographic medium which records the squinted RF image, covering a wide RF bandwidth (approaching 20 GHz) with resolution of approximately 1 MHz. Subsequently, a frequency-swept laser can read out the squinted image while a magnification-compensating motorized zoom lens synchronously corrects the magnification due to beam squint. Time-integration the image on a CCD detector array produces a squint-compensated broadband RF image, while detection with a MHz bandwidth detector can produce spectral estimates for all sources recorded with this imaging system.

Paper Details

Date Published: 15 October 2004
PDF: 9 pages
Proc. SPIE 5546, Imaging Spectrometry X, (15 October 2004); doi: 10.1117/12.559689
Show Author Affiliations
Friso Schlottau, Univ. of Colorado/Boulder (United States)
Benjamin Braker, Univ. of Colorado/Boulder (United States)
Kelvin Wagner, Univ. of Colorado/Boulder (United States)

Published in SPIE Proceedings Vol. 5546:
Imaging Spectrometry X
Sylvia S. Shen; Paul E. Lewis, Editor(s)

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