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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.

PubMed
Authors: Lancaster DG, Richter D, Curl RF, Tittel FK, Goldberg L, Koplow J

Year

1999

Paper ID

13361

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

82

Citations

23

Abstract

We report the generation of up to 0.7 mW of narrow-linewidth (<60-MHz) radiation at 3.3 micrometers by difference frequency mixing of a Nd:YAG-seeded 1.6-W Yb fiber amplifier and a 1.5-micrometers 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 x 10(-5) (+/-1 sigma), corresponding to a sub-parts-in-10(9) (ppb) CH4 sensitivity (0.8 ppb).

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  • We report the generation of up to 0.7 mW of narrow-linewidth (

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References & Citation Signals

[1] DOI https://doi.org/10.1364/ol.24.001744 [2] Publisher https://pubmed.ncbi.nlm.nih.gov/11543188/

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External citation index: OpenAlex citation signal • updated 2026-10-23 02:56:19

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