Diode laser MIR-DFG spectrometer for trace gas detection

Ulrike Willer; Torsten Blanke; Wolfgang Schade

doi:10.1117/12.255333

21 October 1996 Diode laser MIR-DFG spectrometer for trace gas detection

Ulrike Willer, Torsten Blanke, Wolfgang Schade

Proceedings Volume 2834, Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Process Monitoring; (1996) https://doi.org/10.1117/12.255333
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

Two cw-single mode diode-lasers with powers of 30 and 50 mW at the center wavelengths 682 and 791 nm are applied as signal and pump sources for difference frequency generation (DFG) in an AgGaS₂ crystal with a length of 30 mm. For 90 degree type I phase matching tunable mid-infrared laser radiation is obtained in the spectral range between 4.9 and 5.1 micrometers , while the DFG-output power is 0.2 (mu) W. The performance of this diode-laser MIR-DFG spectrometer is shown as the absorption of CO for the P(28) rotational line around 2023 cm^-1 is probed in a cell and on-line in the exhaust of an engine.

Citation Download Citation

Ulrike Willer, Torsten Blanke, and Wolfgang Schade "Diode laser MIR-DFG spectrometer for trace gas detection", Proc. SPIE 2834, Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Process Monitoring, (21 October 1996); https://doi.org/10.1117/12.255333

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