Optical-Fiber-Type Broadband Cavity Ring-Down Spectroscopy Using Wavelength-Tunable Ultrashort Pulsed Light
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概要
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We proposed an optical-fiber-type broadband cavity ring-down spectroscopy system using wavelength-tunable ultrashort pulsed light. The absorbance of glucose in various concentrations in water was derived from the ring-down plots of intensities of the interference waveforms generated using a Mach--Zehnder interferometer with different optical delay path lengths, which were shifted by an automatic optical switching module. The absorption spectrum of glucose was obtained in the wavelength region from 1620 to 1690 nm by varying the wavelength using wavelength-tunable ultrashort pulsed light, which was generated from a femtosecond pulsed laser and polarization-maintaining fiber. The measurement error of concentration was improved using multiple linear regression analysis of absorption spectra. The results demonstrate that the optical-fiber-type cavity ring-down spectroscopy system has the potential to measure broadband absorption spectra with high sensitivity.
- 2013-04-25
著者
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Hori Masaru
Department Of Electrical Engineering And Computer Science Graduate School Of Engineering Nagoya Univ
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Ito Masafumi
Department Of Electrical And Electronic Engineering Faculty Of Science And Technology Meijo Universi
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Nishizawa Norihiko
Department Of Electrical Engineering And Computer Science Nagoya University
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Ito Masafumi
Department of Electrical and Electronic Engineering, Faculty of Science and Technology, Meijo University, Nagoya 468-8502, Japan
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Ohta Takayuki
Department of Chemistry, Graduate School of Science, The University of Tokyo
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Hiraoka Takehiro
Department of Electrical Engineering and Computer Science, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
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Hori Masaru
Department of Electrical Engineering and Computer Science, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
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