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Optics Letters

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  • Vol. 24, Iss. 23 — Dec. 1, 1999
  • pp: 1744–1746

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

D. G. Lancaster, D. Richter, R. F. Curl, F. K. Tittel, L. Goldberg, and J. Koplow  »View Author Affiliations


Optics Letters, Vol. 24, Issue 23, pp. 1744-1746 (1999)
http://dx.doi.org/10.1364/OL.24.001744


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Abstract

We report the generation of up to 0.7 mW of narrow-linewidth (<60-MHz) radiation at 3.3μm by difference frequency mixing of a Nd:YAG-seeded 1.6-W Yb fiber amplifier and a 1.5-μm diode-laser-seeded 0.6-W Er/Yb fiber amplifier in periodically poled LiNbO3 . A conversion efficiency of 0.09%/W (0.47 mWW-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 × 10-5 (±1σ), corresponding to a sub-parts-in- 109(ppb) CH4 sensitivity (0.8 ppb).

© 1999 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(190.2620) Nonlinear optics : Harmonic generation and mixing
(280.3420) Remote sensing and sensors : Laser sensors
(300.6340) Spectroscopy : Spectroscopy, infrared

Citation
D. G. Lancaster, D. Richter, R. F. Curl, F. K. Tittel, L. Goldberg, and J. Koplow, "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," Opt. Lett. 24, 1744-1746 (1999)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-24-23-1744


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