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Stabilize QCL Systems with Dynamic Alignment to Detect Trace Gases

Technology Benefits

Higher signal-to-noise ratio Prevents slow signal drift due to misalignment Low power requirements Low-cost method Detects multiple analytes

Technology Application

Gas sensors using QCL-based external cavity systems

Detailed Technology Description

By analyzing changes in optical feedback, observed as changes in QCL impedance, this technology produces an error signal that can be used to stabilize the QCL system alignment. A measurement of the QCLΓÇÖs compliance voltage is used to determine the QCLΓÇÖs impedance in real time and produce a signal, conditioned and analyzed with signal processing techniques to become an error signal. The error signal is sent to electromechanical and electro-optical controls and devices (e.g. galvanometer-mounted and/or piezo-controlled mirror mounts and supports), which are adjusted using known noise cancelling techniques to ensure optimized alignment for improved QCL system performance.

Country/Region

USA

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