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Petersen Research Group

Texas A&M University College of Engineering

Tunable Diode Lasers

External-cavity tunable diode lasers (TDLs) can provide access to the visible and near-infrared regions of the electromagnetic spectrum, at wavelengths between approximately 350 nm and 3 microns. The wavelength and power output of TDLs are controlled by current and temperature controllers and also by adjustment of the external cavity (most commonly a reflective diffraction grating). In our laboratory, TDLs have been used to measure H2O concentrations. TDLs can be operated in fixed- or scanned-wavelength configurations and are arranged in the same general direct absorption setup as for QCLs.

General schematic of a grating-stabilized TDL.

 

TDL setup at the Petersen Research group to measure H2O.

Facilities

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    • Quantum Cascade Lasers
    • Tunable Diode Lasers
    • Gas lasers
    • High-Speed Imaging
    • Collaborator Diagnostics
  • Constant-Volume Combustion Vessels
  • Propellant and Energetics Laboratory
  • Unique Experiments

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