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Title: Improvement of terahertz imaging with a dynamic subtraction technique

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}. We also introduce a modified detection geometry that realizes near-field imaging capability with greatly improved spatial resolution. (c) 2000 Optical Society of America.

Authors:
 [1];  [2];  [3]
  1. Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180-3590 (United States)
  2. Department of Environmental and Energy Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180-3590 (United States)
  3. Department of Physics, Applied Physics, and Astronomy and the Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180-3590 (United States)
Publication Date:
OSTI Identifier:
20217162
Resource Type:
Journal Article
Journal Name:
Applied Optics
Additional Journal Information:
Journal Volume: 39; Journal Issue: 17; Other Information: PBD: 10 Jun 2000; Journal ID: ISSN 0003-6935
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; IMAGE PROCESSING; LASER RADIATION; PULSE TECHNIQUES; MEASURING METHODS; ELECTRO-OPTICAL EFFECTS; EXPERIMENTAL DATA

Citation Formats

Jiang, Zhiping, Xu, X. G., and Zhang, X.-C. Improvement of terahertz imaging with a dynamic subtraction technique. United States: N. p., 2000. Web. doi:10.1364/AO.39.002982.
Jiang, Zhiping, Xu, X. G., & Zhang, X.-C. Improvement of terahertz imaging with a dynamic subtraction technique. United States. doi:10.1364/AO.39.002982.
Jiang, Zhiping, Xu, X. G., and Zhang, X.-C. Sat . "Improvement of terahertz imaging with a dynamic subtraction technique". United States. doi:10.1364/AO.39.002982.
@article{osti_20217162,
title = {Improvement of terahertz imaging with a dynamic subtraction technique},
author = {Jiang, Zhiping and Xu, X. G. and Zhang, X.-C.},
abstractNote = {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}. We also introduce a modified detection geometry that realizes near-field imaging capability with greatly improved spatial resolution. (c) 2000 Optical Society of America.},
doi = {10.1364/AO.39.002982},
journal = {Applied Optics},
issn = {0003-6935},
number = 17,
volume = 39,
place = {United States},
year = {2000},
month = {6}
}