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Proceedings Paper

Optically synchronized dual-channel terahertz signals for high-performance transmitter/receiver system
Author(s): Naofumi Shimizu; Kyoung-Hwan Oh; Satoshi Kohjiro; Ken'ichi Kikuchi; Atsushi Wakatsuki; Naoya Kukutsu; Yuichi Kado
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Paper Abstract

We developed a high-sweeping-speed optically synchronized dual-channel terahertz signal generator, in which the frequency difference between the two terahertz signals is independent of the frequency of the terahertz signals themselves. This feature is essential for heterodyne detection of terahertz signals with various frequencies. With this generator, a frequency-sweepable terahertz transmitter (Tx)/receiver (Rx) system with a wide dynamic range can be realized without sacrificing the high frequency-sweeping speed. Absorption line measurements for water vapor and nitrous oxide show that the developed Tx/Rx system can detect gas absorption with the optical depth of 0.04 or less. This result indicates the potential of the system as a remote gas sensor and gas analyzer.

Paper Details

Date Published: 18 February 2010
PDF: 8 pages
Proc. SPIE 7601, Terahertz Technology and Applications III, 76010D (18 February 2010); doi: 10.1117/12.840637
Show Author Affiliations
Naofumi Shimizu, NTT Microsystem Integration Labs. (Japan)
Kyoung-Hwan Oh, NTT Microsystem Integration Labs. (Japan)
Satoshi Kohjiro, National Institute of Advanced Industrial Science and Technology (Japan)
Ken'ichi Kikuchi, National Institute of Advanced Industrial Science and Technology (Japan)
Atsushi Wakatsuki, NTT Photonics Labs. (Japan)
Naoya Kukutsu, NTT Microsystem Integration Labs. (Japan)
Yuichi Kado, NTT Microsystem Integration Labs. (Japan)

Published in SPIE Proceedings Vol. 7601:
Terahertz Technology and Applications III
Laurence P. Sadwick; Creidhe M. M. O'Sullivan, Editor(s)

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