High-sweeping-speed optically synchronized dual-channel terahertz-signal generator for driving a superconducting tunneling mixer and its application to active gas sensing

We propose a high-sweeping-speed optically synchronized dual-channel terahertz (THz) signal generator for an active gas-sensing system with a superconductor-insulator-superconductor (SIS) mixer. The generator can sweep a frequency range from 200 to 500 GHz at a speed of 375 GHz/s and a frequency res...

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Bibliographic Details
Published in:Optics express 2009-10, Vol.17 (21), p.18455-18461
Main Authors: Oh, Kyoung-Hwan, Shimizu, Naofumi, Kohjiro, Satoshi, Kikuchi, Ken'ichi, Wakatsuki, Atsushi, Kukutsu, Naoya, Kado, Yuichi
Format: Article
Language:English
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Summary:We propose a high-sweeping-speed optically synchronized dual-channel terahertz (THz) signal generator for an active gas-sensing system with a superconductor-insulator-superconductor (SIS) mixer. The generator can sweep a frequency range from 200 to 500 GHz at a speed of 375 GHz/s and a frequency resolution of 500 MHz. With the developed gas-sensing system, a gas-absorption-line measurement was successfully carried out with N(2)O gas in that frequency range.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.17.018455