Compact and low-cost THz QTDS system
Open accessAbstract
We present a terahertz quasi time domain spectroscopy (QTDS) system setup which is improved regarding cost and compactness. The diode laser is mounted directly onto the optical delay line, making the optical setup more compact. The system is operated using a Raspberry Pi and an additional sound card. This combination replaces the desktop/laptop computer, the lock-in-amplifier, the stage controller and the signal generator. We examined not only a commercially available stepper motor driven delay line, but also the repurposed internal mechanics from a DVD drive. We characterize the performance of the new system concept.
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Errors in the acquired electric field lead to errors in the spectrum and thus in material parameters such as the complex refractive index.
“In the subsequent data analysis this will lead to errors in the spectrum 𝐸𝐸 ( 𝜔𝜔 ) and thus in the material parameters, as e.g. the complex refractive index 𝑛𝑛 ( 𝜔𝜔 ) [7].”
From On the Influence of Delay Line Uncertainty in THz Time-Domain Spectroscopy (2016) · cites this paper as [7]
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References 16 · Cited by 25
- Authors
- Probst, T., Rehn, A., & Koch, M.
- Venue
- Optics Express
- Publisher
- Optica Publishing Group
- Published
- 2015-08-13
- Volume
- 23
- Issue
- 17
- Pages
- 21972
- ISSN
- 1094-4087 (ISSN-L)
- OpenAlex
- W2285500557
- Cited by
- 25
- References
- 16
- Citations by year
- 2026: 1 · 2024: 1 · 2023: 3 · 2022: 1 · 2021: 3 · 2020: 1 · 2019: 4 · 2018: 3 · 2017: 3 · 2016: 5
- FWCI
- 1.77
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Optics Express (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
- Physical Sciences › Chemistry › Spectroscopy › Spectroscopy and Laser Applications
- Keywords
- low-cost instrumentation, compact optical system, optical delay line, Raspberry Pi, sound card, diode laser, terahertz spectroscopy
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Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
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