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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 13 — Jul. 1, 2013
  • pp: 2307–2310

Continuous-wave terahertz field imaging based on photonics-based self-heterodyne electro-optic detection

Shintaro Hisatake and Tadao Nagatsuma  »View Author Affiliations


Optics Letters, Vol. 38, Issue 13, pp. 2307-2310 (2013)
http://dx.doi.org/10.1364/OL.38.002307


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Abstract

We demonstrate a photonics-based self-heterodyne electro-optic field imaging technique at terahertz (THz) frequency. An optical intensity beat generated by mixing two frequency-detuned free-running lasers is used for both the generation and the detection. The frequency of the beat for detection is shifted by an optical frequency shifter to realize coherent heterodyne measurement with free-running lasers. Neither mechanical delay lines nor phase-locked synthesizers are required for the amplitude and the phase imaging of the THz field, and the system simplicity is thus improved. The amplitude and phase of the THz field (125 GHz) radiated from a horn antenna are simultaneously imaged, and the standard deviation of the phase measurement is found to be 0.18 rad.

© 2013 Optical Society of America

OCIS Codes
(300.6495) Spectroscopy : Spectroscopy, teraherz
(110.6795) Imaging systems : Terahertz imaging
(170.6795) Medical optics and biotechnology : Terahertz imaging

ToC Category:
Spectroscopy

History
Original Manuscript: May 6, 2013
Revised Manuscript: May 31, 2013
Manuscript Accepted: May 31, 2013
Published: June 26, 2013

Citation
Shintaro Hisatake and Tadao Nagatsuma, "Continuous-wave terahertz field imaging based on photonics-based self-heterodyne electro-optic detection," Opt. Lett. 38, 2307-2310 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-13-2307


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