Research Data Leeds Repository
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Dataset for Gas spectroscopy with integrated frequency monitoring through self-mixing in a terahertz quantum-cascade laser.
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 H (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.
| Additional information: | The paper associated with this dataset is in review. The dataset may change as a result of the review. | ||||||
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| Keywords: | infrared spectra, quantum cascade lasers, submillimeter wave technology, spectroscopy | ||||||
| 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 > 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: | http://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: 11 ... hanol, over full current range [156MB] |
Self-mixing interferograms: empty gas cell [83MB] |
Self-mixing interferograms: em ... cell, over full current range [158MB] |
Program
Data analysis scripts [12kB] |