High-power continuous-wave mid-infrared radiation generated by difference frequency mixing of diode-laser-seeded fiber amplifiers and its application to dual-beam spectroscopy

被引：26

作者：

Lancaster, DG ^{[1
]}

Richter, D

Curl, RF

Tittel, FK

Goldberg, I

Koplow, J

机构：

[1] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA

[2] USN, Res Lab, Div Opt Sci, Washington, DC 20375 USA

来源：

OPTICS LETTERS | 1999年 / 24卷 / 23期

关键词：

D O I：

10.1364/OL.24.001744

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the generation of up to 0.7 mW of narrow-linewidth (<60-MHz) radiation at 3.3 mu m by difference frequency mixing of a Nd:YAG-seeded 1.6-W Yb fiber amplifier and a 1.5-mu m diode-laser-seeded 0.6-W Er/Yb fiber amplifier in periodically poled LiNbO3. A conversion efficiency of 0.09%/W (0.47 mW W-2 cm(-1)) was achieved. A room-air CH4 spectrum acquired with a compact 80-m multipass cell and a dual-beam spectroscopic configuration indicates an absorption sensitivity of +/-2.8 x 10(-6) (+/-1 sigma), corresponding to a subparts-in-10(9) (ppb) CH4 sensitivity (0.8 ppb). (C) 1999 Optical Society of America.

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页码：1744 / 1746

页数：3

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