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arXiv · 1308.6430

Robust, frequency-stable and accurate mid-IR laser spectrometer based on frequency comb metrology of quantum cascade lasers up-converted in orientation-patterned GaAs

Michael G. Hansen·Ingo Ernsting·Sergey V. Vasilyev·Arnaud Grisard·Eric Lallier·Bruno Gérard·Stephan Schiller
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Abstract

We demonstrate a robust and simple method for measurement, stabilization and tuning of the frequency of cw mid-infrared (MIR) lasers, in particular of quantum cascade lasers. The proof of principle is performed with a quantum cascade laser at 5.4 \mu m, which is upconverted to 1.2 \mu m by sum-frequency generation in orientation-patterned GaAs with the output of a standard high-power cw 1.5 \mu m fiber laser. Both the 1.2 \mu m and the 1.5 \mu m waves are measured by a standard Er:fiber frequency comb. Frequency measurement at the 100 kHz-level, stabilization to sub-10 kHz level, controlled frequency tuning and long-term stability are demonstrated.

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Michael G. Hansen, Ingo Ernsting, Sergey V. Vasilyev, Arnaud Grisard, Eric Lallier, Bruno Gérard, Stephan Schiller. 2013-08-29. Robust, frequency-stable and accurate mid-IR laser spectrometer based on frequency comb metrology of quantum cascade lasers up-converted in orientation-patterned GaAs. https://doi.org/10.1364/oe.21.027043

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