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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 17 — Jun. 10, 2000
  • pp: 2982–2987

Improvement of terahertz imaging with a dynamic subtraction technique

Zhiping Jiang, X. G. Xu, and X.-C. Zhang  »View Author Affiliations


Applied Optics, Vol. 39, Issue 17, pp. 2982-2987 (2000)
http://dx.doi.org/10.1364/AO.39.002982


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Abstract

By use of dynamic subtraction it is feasible to adopt phase-sensitive detection with a CCD camera to reduce long-term optical background drift. We report on a two-order improvement of the signal-to-noise ratio. The improved system is used to image terahertz field distribution generated by an optically rectified electro-optic crystal with a modulation depth as small as 10<sup>−4</sup>. We also introduce a modified detection geometry that realizes near-field imaging capability with greatly improved spatial resolution.

© 2000 Optical Society of America

OCIS Codes
(110.2970) Imaging systems : Image detection systems
(250.5530) Optoelectronics : Pulse propagation and temporal solitons
(320.7100) Ultrafast optics : Ultrafast measurements
(320.7120) Ultrafast optics : Ultrafast phenomena

Citation
Zhiping Jiang, X. G. Xu, and X.-C. Zhang, "Improvement of terahertz imaging with a dynamic subtraction technique," Appl. Opt. 39, 2982-2987 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-17-2982

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