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Sensors 2013, 13(3), 3299-3312; doi:10.3390/s130303299

A Real-Time Terahertz Time-Domain Polarization Analyzer with 80-MHz Repetition-Rate Femtosecond Laser Pulses

* ,
Department of Physics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
* Author to whom correspondence should be addressed.
Received: 29 January 2013 / Revised: 26 February 2013 / Accepted: 7 March 2013 / Published: 11 March 2013
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Japan 2012)
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We have developed a real-time terahertz time-domain polarization analyzer by using 80-MHz repetition-rate femtosecond laser pulses. Our technique is based on the spinning electro-optic sensor method, which we recently proposed and demonstrated by using a regenerative amplifier laser system; here we improve the detection scheme in order to be able to use it with a femtosecond laser oscillator with laser pulses of a much higher repetition rate. This improvement brings great advantages for realizing broadband, compact and stable real-time terahertz time-domain polarization measurement systems for scientific and industrial applications.
Keywords: terahertz spectroscopy; polarization analysis; electro-optic sensor terahertz spectroscopy; polarization analysis; electro-optic sensor
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Watanabe, S.; Yasumatsu, N.; Oguchi, K.; Takeda, M.; Suzuki, T.; Tachizaki, T. A Real-Time Terahertz Time-Domain Polarization Analyzer with 80-MHz Repetition-Rate Femtosecond Laser Pulses. Sensors 2013, 13, 3299-3312.

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