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High-resolution, broadly-tunable mid-IR spectroscopy using a continuous wave optical parametric oscillator

We report on the design and automation of a mid-infrared, continuous wave, singly-resonant optical parametric oscillator. Hands-free controls and the implementation of a tuning algorithm allowed for hundreds of nanometers of continuous, effective-mode-hop-free tuning over the range of 2190-4000 nm....

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Bibliographic Details
Published in:Optics express 2021-02, Vol.29 (4), p.5295-5303
Main Authors: Foote, David B, Cich, Matthew J, Hurlbut, Walter C, Eismann, Ulrich, Heiniger, Adam T, Haimberger, Chris
Format: Article
Language:English
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Summary:We report on the design and automation of a mid-infrared, continuous wave, singly-resonant optical parametric oscillator. Hands-free controls and the implementation of a tuning algorithm allowed for hundreds of nanometers of continuous, effective-mode-hop-free tuning over the range of 2190-4000 nm. To demonstrate the applicability of this light source and algorithm to mid-IR spectroscopy, we performed a sample spectroscopy measurement in a C H gas cell and compared the experimentally-measured absorption spectrum to HITRAN 2016 simulations. We found excellent agreement with simulation in both peak heights and peak centers; we also report a reduced uncertainty in peak centers compared to simulation.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.418287