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Dataset for Gas spectroscopy with integrated frequency monitoring through self-mixing in a terahertz quantum-cascade laser.
Citation
Chhantyal-Pun, Rabi and Valavanis, Alexander and Keeley, James and Rubino, Pierluigi and Kundu, Iman and Han, Yingjun and Dean, Paul and Li, Lianhe and Davies, A. Giles and Linfield, Edmund (2017) Dataset for Gas spectroscopy with integrated frequency monitoring through self-mixing in a terahertz quantum-cascade laser. University of Leeds. [Dataset] https://doi.org/10.5518/204
Dataset description
This archive contains the dataset associated with the publication entitled 'Gas spectroscopy with integrated frequency-monitoring through self-mixing in a terahertz quantum-cascade laser'. In this work, we demonstrate a gas spectroscopy technique based on self-mixing interferometry in a 3.4-THz quantum-cascade laser (QCL). All previous QCL spectroscopy techniques have required additional THz instrumentation (detectors, mixers or spectrometers) for system-precalibration or in situ spectral analysis. By contrast, our system self-calibrates the laser frequency to a precision of 630 MHz (0.02%) by analyzing voltage perturbations across the QCL, in response to optical feedback from a mirror mounted on a 0-800-mm round-trip delayline. We demonstrate spectroscopy of methanol by introducing a gas cell into the feedback path, and show that a limiting absorption coefficient of ~0.0001 /cm is resolvable. This dataset includes the raw data used to generate all figures within the publication.
| Keywords: | infrared spectra, quantum cascade lasers, submillimeter wave technology, spectroscopy | ||||||
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| Subjects: | F000 - Physical sciences > F300 - Physics > F360 - Optical physics > F361 - Laser physics F000 - Physical sciences > F100 - Chemistry > F180 - Analytical chemistry |
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| Divisions: | Faculty of Engineering and Physical Sciences > School of Electronic and Electrical Engineering > Institute of Microwaves and Photonics | ||||||
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| License: | Creative Commons Attribution 4.0 International (CC BY 4.0) | ||||||
| Date deposited: | 17 Aug 2017 10:47 | ||||||
| URI: | https://archive.researchdata.leeds.ac.uk/id/eprint/238 | ||||||
Files
Documentation
Dataset description [1kB]  |
Dataset description [1kB] 
Dataset description [1kB] Data
Direct transmission spectroscopy through methanol [2kB] |
Simulated absorption spectrum of methanol [19kB] |
Self-mixing interferograms: 400mTorr methanol [85MB] |
Self-mixing interferograms: 700mTorr methanol [85MB] |
Self-mixing interferograms: 1100mTorr methanol [81MB] |
Self-mixing interferograms: 1100mTorr methanol, over full current range [156MB] |
Self-mixing interferograms: empty gas cell [83MB] |
Self-mixing interferograms: empty gas cell, over full current range [158MB] |
Program
Data analysis scripts [12kB] |