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8 March 2021 Wide dynamic range real-time terahertz spectrometer using fast wavelength-tunable terahertz parametric generator
Kosuke Murate, Sota Mine, Kodo Kawase
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Proceedings Volume 11671, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications VI; 116710J (2021) https://doi.org/10.1117/12.2578124
Event: SPIE LASE, 2021, Online Only
Abstract
In this work, we demonstrated real-time spectroscopy using a discreetly and fast wavelength tunable injection-seeded THz wave parametric generator (is-TPG). In our is-TPG, pump and seed beams shine the MgO:LiNbO3 crystal to generate the THz wave. At that time, the wavelength was tuned by changing the wavelength of the seed beam. Therefore, in order to achieve real-time measurement, we introduced fast wavelength switchable ECDL that we developed recently using a digital micromirror device (DMD) as a wavelength selector. As a result of this improvement, we achieved to identify the reagents hidden in cardboard box in real-time.
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Kosuke Murate, Sota Mine, and Kodo Kawase "Wide dynamic range real-time terahertz spectrometer using fast wavelength-tunable terahertz parametric generator", Proc. SPIE 11671, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications VI, 116710J (8 March 2021); https://doi.org/10.1117/12.2578124
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KEYWORDS
Terahertz radiation
Spectroscopy
Wavelength tuning
Absorption
Crystals
Digital micromirror devices
High dynamic range imaging
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