1 May 2001 Spectroscopic detection of ammonia using diode-pumped difference-frequency generation
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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.
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Toshitsugu Ueda, Toshitsugu Ueda, Morio Wada, Morio Wada, Tadashi Sugiyama, Tadashi Sugiyama, Shinichi Nakajima, Shinichi Nakajima, Toshimasa Umezawa, Toshimasa Umezawa, Shoujirou Araki, Shoujirou Araki, Takahiro Kudou, Takahiro Kudou, } "Spectroscopic detection of ammonia using diode-pumped difference-frequency generation", Proc. SPIE 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials, (1 May 2001); doi: 10.1117/12.424646; https://doi.org/10.1117/12.424646
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