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Proceedings Paper

Widely tunable monochromatic sources and novel detection scheme for THz imaging
Author(s): Yujie J. Ding; Wei Shi
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Paper Abstract

We review our recent progress made on the development of widely-tunable monochromatic THz sources implemented based on difference-frequency generation (DFG) in GaSe, ZnGeP2, and GaP. Using a GaSe crystal the output wavelength was tuned in the range of from 66.5 μm (150 cm-1) to 5664 μm (1.77 cm-1), i.e. into the mm-wave region, with the peak power as high as 389 W. Such a record-high peak power corresponds to a conversion efficiency of about 0.1%. On the other hand, based on DFG in ZnGeP2 and GaP crystals the output wavelengths were tuned in the wide ranges with high peak powers. There is an obvious advantage of using GaP over GaSe and ZnGeP2, i.e. crystal rotation is no longer required for achieving wavelength tuning. Instead, one just needs to tune the wavelength of one mixing beam within a narrow bandwidth.

Paper Details

Date Published: 7 November 2005
PDF: 10 pages
Proc. SPIE 5989, Technologies for Optical Countermeasures II; Femtosecond Phenomena II; and Passive Millimetre-Wave and Terahertz Imaging II, 59891B (7 November 2005); doi: 10.1117/12.631231
Show Author Affiliations
Yujie J. Ding, Lehigh Univ. (United States)
Wei Shi, Lehigh Univ. (United States)


Published in SPIE Proceedings Vol. 5989:
Technologies for Optical Countermeasures II; Femtosecond Phenomena II; and Passive Millimetre-Wave and Terahertz Imaging II
Sean M. Kirkpatrick; David H. Titterton; Roger Appleby; J. Martyn Chamberlain; Razvan Stoian; Keith A. Krapels, Editor(s)

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