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GHz Heterodyne generation using Two DFB Mid-IR QCL lasers on a 9µm QWIP

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Abstract

We report the implementation of a heterodyne measurement setup using two DFB Mid-IR QCL lasers on a 9µm Quantum Well Infrared Photodetector (QWIP). We present the measurement of the signal-to-noise ratio characterization of the detector thanks to the heterodyne technique and the obtained frequency stability for the QCL in terms of a linewidth inferior to 3MHz at 300 KHz of resolution bandwidth.

© 2018 The Author(s)

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