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External short-cavity diode-laser for MIR difference-frequency generation

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Abstract

A compact mid-infrared (MIR) laser system is described applying two single mode diode-lasers as pump and signal sources to generate difference-frequency radiation in AgGaS2. A spectral tuning range of 71.5 cm-1 between 4.9–5.1 μm with an output power of 100 nW and linewidth of 1.2×10-2 cm-1 (3.6 GHz) for the DFG laser system is obtained by mode behavior improvement of the pump source using an external short-cavity. The performance of such an external short-cavity MIR-DFG laser spectrometer is demonstrated by recording the fundamental absorption spectra of carbon monoxide (12C16O) and nitric oxide (14N16O) in a 10 cm long cell in order to estimate line-broadening coefficients of CO and NO molecules, which are of general interest in combustion diagnostics .

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Authors and Affiliations

  1. Institut für Physik und Physikalische Technologien, Technische Universität Clausthal, Leibnizstrasse 4, 38678, Clausthal-Zellerfeld, Germany

    A. Khorsandi, U. Willer, P. Geiser & W. Schade

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  1. A. Khorsandi
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  2. U. Willer
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  3. P. Geiser
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  4. W. Schade
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Correspondence to W. Schade.

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PACS

32.20.-t; 33.20.Ea; 42.60-v; 42.60.Fc; 42.62.-b; 42.62.Fi; 42.68.-w; 42.68.Ca; 42.72.-g; 42.72.Ai

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Khorsandi, A., Willer, U., Geiser, P. et al. External short-cavity diode-laser for MIR difference-frequency generation. Appl Phys B 77, 509–513 (2003). https://doi.org/10.1007/s00340-003-1274-8

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  • DOI: https://doi.org/10.1007/s00340-003-1274-8

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