Multi-spectral optoelectronic device for skin microcirculation analysis

The developed optical fiber laser diode biosensor comprises one multi-wavelength laser diode (405, 660 and 780 nm) and a single photodiode with multi-channel signal output processing and a built-in Li-ion accumulator. Special software was created for visualisation and measuring of multi-spectral photoplethysmography signals. The prototype device was tested on 11 healthy subjects.