Yb fiber laser pumped Mid-IR source based on difference frequency generation and its application to ammonia detection

被引:12
作者
Matsuoka, N [1 ]
Yamaguchi, S
Nanri, K
Fujioka, T
Richter, D
Tittel, FK
机构
[1] Tokai Univ, Sch Sci, Dept Phys, Hiratsuka, Kanagawa 2591292, Japan
[2] Rice Univ, Rice Quantum Inst, Houston, TX 77251 USA
来源
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2001年 / 40卷 / 2A期
关键词
difference frequency generation; cw mid infrared source; Yb fiber laser; PPLN crystal; NH3; detection; laser spectroscopy;
D O I
10.1143/JJAP.40.625
中图分类号
O59 [应用物理学];
学科分类号
摘要
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 mum with a power of similar to2.5 muW 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 mum) was obtained at a cell pressure of 27 Pa from which a detection sensitivity of 24 ppm.m was estimated.
引用
收藏
页码:625 / 628
页数:4
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