1 May 2001 Spectroscopic detection of ammonia using diode-pumped difference-frequency generation
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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.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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