Quantum cascade laser-based mid-IR frequency metrology system with ultra-narrow linewidth and 1  ×  10⁻¹³-level frequency instability

We demonstrate a powerful tool for high-resolution mid-IR spectroscopy and frequency metrology with quantum cascade lasers (QCLs). We have implemented frequency stabilization of a QCL to an ultra-low expansion (ULE) reference cavity, via upconversion to the near-IR spectral range, at a level of 1×10...

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Bibliographic Details
Published in:Optics letters 2015-05, Vol.40 (10), p.2289-2292
Main Authors: Hansen, Michael G, Magoulakis, Evangelos, Chen, Qun-Feng, Ernsting, Ingo, Schiller, Stephan
Format: Article
Language:English
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Summary:We demonstrate a powerful tool for high-resolution mid-IR spectroscopy and frequency metrology with quantum cascade lasers (QCLs). We have implemented frequency stabilization of a QCL to an ultra-low expansion (ULE) reference cavity, via upconversion to the near-IR spectral range, at a level of 1×10(-13). The absolute frequency of the QCL is measured relative to a hydrogen maser, with instability
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.40.002289