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Proceedings Paper

Spectroscopic detection of ammonia using diode-pumped difference-frequency generation
Author(s): Toshitsugu Ueda; Morio Wada; Tadashi Sugiyama; Shinichi Nakajima; Toshimasa Umezawa; Shoujirou Araki; Takahiro Kudou
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Paper Abstract

Use of photons for in-situ measurements of various objects provides a number of benefits, such as precise real-time measurement with no effect on the measured objects. Our research aims to develop an in-situ measurement technology that uses the benefits of photons and is ideal for applications in production lines. We succeeded in developing a tunable laser beam source to obtain the spectral line width of 5 MHz and a continuous wavelength sweep bandwidth of 200 nm, thus achieving our initial target. We believe that these characteristics are sufficient for use in absorption spectroscopy measurement of gases. For a 2.5 - 2.7 micrometer- band quantum infrared photo detector, we achieved the initial target of D* equals 1 to 3 X 1011 cmHz1/2/W (at room temperature). For a 3 - 10 micrometer-band quantum infrared photo detector, we performed a study on designing an InAsP/InP multi-quantum well light-absorbing layer.

Paper Details

Date Published: 1 May 2001
PDF: 5 pages
Proc. SPIE 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials, (1 May 2001); doi: 10.1117/12.424646
Show Author Affiliations
Toshitsugu Ueda, Yokogawa Electric Corp. (Japan)
Morio Wada, Yokogawa Electric Corp. (Japan)
Tadashi Sugiyama, Yokogawa Electric Corp. (Japan)
Shinichi Nakajima, Yokogawa Electric Corp. (Japan)
Toshimasa Umezawa, Yokogawa Electric Corp. (Japan)
Shoujirou Araki, Yokogawa Electric Corp. (Japan)
Takahiro Kudou, Yokogawa Electric Corp. (Japan)


Published in SPIE Proceedings Vol. 4268:
Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials
Jeffrey W. Pierce; Kathleen I. Schaffers; Kathleen I. Schaffers, Editor(s)

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