Performance characteristics of narrow linewidth fiber laser pumped mid-IR difference frequency mixing light source for methane detection

被引：0

作者：

Ashizawa, Hiroaki ^{[1
]}

Ohara, Shinobu ^{[1
]}

Yamaguchi, Shigeru ^{[1
]}

Takahashi, Masao ^{[1
]}

Endo, Masamori ^{[1
]}

Nanri, Kenzo ^{[1
]}

Fujioka, Tomoo ^{[1
]}

Tittel, Frank.K. ^{[2
]}

机构：

[1] Department of Physics, School of Science, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan

[2] Rice Quantum Institute, Rice University, Houston, TX 77251-1892, United States

来源：

Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers | 2003年 / 42卷 / 03期

关键词：

Absorption - Crystals - Fiber Bragg gratings - Frequencies - Gas detectors - Lithium niobate - Methane - Pumping (laser) - Spectrum analysis;

D O I：

10.1143/jjap.42.1263

中图分类号：

学科分类号：

摘要：

A high-power, narrow-linewidth Yb fiber laser with a fiber Bragg grating (FBG) pumped difference frequency generation (DFG) in a periodically poled lithium niobate (PPLN) crystal was investigated in detail. A mid-IR power of ∼2.3 μW at 3.3 μm with a slope efficiency of 0.85 mW/W2 was achieved. A Doppler-broadened absorption spectrum of CH4 at 3038.497 cm-1 (3.2911 μm) was obtained with a 0.1-m long-gas cell at a pressure of 133 Pa. The linewidth of the DFG source was evaluated to be less than 96 MHz from the observed spectral linewidth. Real-time monitoring of CH4 (∼1.78 ppm) in ambient air in a multipass cell which has an optical path length of 10 m was also demonstrated.

引用

页码：1263 / 1267

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