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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 10 — May. 15, 2010
  • pp: 1680–1682

Adaptive image reconstruction for sparse arrays using single-cycle terahertz pulses

Zhuopeng Zhang and Takashi Buma  »View Author Affiliations


Optics Letters, Vol. 35, Issue 10, pp. 1680-1682 (2010)
http://dx.doi.org/10.1364/OL.35.001680


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Abstract

We demonstrate a noniterative adaptive reconstruction technique to significantly improve the imaging performance of sparse terahertz arrays employing single-cycle pulses. Grating lobe artifacts are suppressed by an adaptive weighting factor derived from the temporal coherence of signals from neighboring array elements. Image quality is further improved by a second weighting factor based on the spatial coherence of signals across the entire array. Experiments are performed with a synthetic aperture two-dimensional sparse array of 56 × 56 elements. Our reconstruction technique suppresses artifacts by 30 dB .

© 2010 Optical Society of America

OCIS Codes
(110.5100) Imaging systems : Phased-array imaging systems
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Imaging Systems

History
Original Manuscript: January 25, 2010
Revised Manuscript: April 2, 2010
Manuscript Accepted: April 9, 2010
Published: May 11, 2010

Citation
Zhuopeng Zhang and Takashi Buma, "Adaptive image reconstruction for sparse arrays using single-cycle terahertz pulses," Opt. Lett. 35, 1680-1682 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-10-1680

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