Yb Fiber Laser Pumped Mid-IR Source Based on Difference Frequency Generation and Its Application to Ammonia Detection
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概要
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A Yb fiber laser pumped cw narrow-linewidth tunable mid-IR source based on a difference frequency generation (DFG) in a periodically poled LiNbO3 (PPLN) crystal for trace gas detection was demonstrated. A high power Yb fiber laser and a distributed feedback (DFB) laser diode were used as DFG pump sources. This source generates mid-IR at 3 $\mu$m with a power of ${\sim}2.5$ $\mu$W and a spectral linewidth of less than 30 MHz. A frequency tuning range of 300 GHz (10 cm-1) was obtained by varying the current and temperature of the DFB laser diode. A high-resolution NH3 absorption Doppler-broadened spectrum at 3295.4 cm-1 (3.0345 $\mu$m) was obtained at a cell pressure of 27 Pa from which a detection sensitivity of 24 ppm$\cdot$m was estimated.
- Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
- 2001-02-15
著者
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Nanri Kenzo
Department Of Physics Faculty Of Science Tokai University
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MATSUOKA Naoya
Department of Physics, School of Science, Tokai University
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Richter Dirk
Rice Quantum Institute Rice University
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Tittel Frank
Rice Quantum Institute Rice University
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Fujioka Tomoo
Department Of Electrical Engineering Faculty Of Engineering Keio University
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Yamaguchi Shigeru
Department Of Applied Chemistry Faculty Of Engineering Ehime Universiry
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Matsuoka Naoya
Department of Physics, School of Science, Tokai University, Kanagawa 259-1292, Japan
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Yamaguchi Shigeru
Department of Physics, School of Science, Tokai University, Kanagawa 259-1292, Japan
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Nanri Kenzo
Department of Physics, School of Science, Tokai University, Kanagawa 259-1292, Japan
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Tittel Frank
Rice Quantum Institute, Rice University, Houston, TX 77251-1892, USA
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Fujioka Tomoo
Department of Physics, School of Science, Tokai University, Kanagawa 259-1292, Japan
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