Design for a low-cost heterodyne frequency domain-diffuse optical spectroscopy system

A design for a low-cost, heterodyne, frequency domain-diffuse optical spectroscopy system is presented and validated. The system uses a single wavelength of 785 nm and a single detector to illustrate the capability, but is built in a modular fashion to make it easily expandable to additional wavelen...

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Bibliographic Details
Published in:Biomedical optics express 2023-06, Vol.14 (6), p.2873-2888
Main Authors: Majeski, Joseph B, Ching-Roa, Vincent D, Giacomelli, Michael G, Choe, Regine
Format: Article
Language:English
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Summary:A design for a low-cost, heterodyne, frequency domain-diffuse optical spectroscopy system is presented and validated. The system uses a single wavelength of 785 nm and a single detector to illustrate the capability, but is built in a modular fashion to make it easily expandable to additional wavelengths and detectors. The design incorporates methods to allow software-based control over the system operating frequency, laser diode output amplitude, and detector gain. Validation methods include characterization of electrical designs as well as determination of the system stability and accuracy using tissue-mimicking optical phantoms. The system requires only basic equipment for its construction and can be built for under .
ISSN:2156-7085
2156-7085
DOI:10.1364/BOE.489058