US Patent No. 11,109,781

ARRAYED WAVEGUIDE GRATING (AWG)-BASED RAMAN SPECTROSCOPY FOR GLUCOSE MONITORING


Patent No. 11,109,781
Issue Date September 07, 2021
Title Arrayed Waveguide Grating (awg)-based Raman Spectroscopy For Glucose Monitoring
Inventorship Sheng Yang, San Francisco, CA (US)
Yen-Chun Yeh, Menlo Park, CA (US)
Dominik Schmidt, Los Altos, CA (US)

Claim of US Patent No. 11,109,781


1. An opto-electronic circuit for an Arrayed Waveguide Grating (AWG)-based Raman spectrometer for non-invasive optical glucose monitoring, the opto-electronic circuit comprising:an AWG, comprising:a substrate;
filled waveguide trenches on the substrate comprising an optical waveguide;
filled doped trenches on the substrate comprising a detector;

a laser source configured to shine light at human skin;
a prism configured to capture light scattered off the human skin when exposed to light from the laser source (“detected light”) and to direct the light toward the AWG;
a signal processing device coupled to the detector;
wherein the signal processing device is configured to determine a glucose level based on the output of the detector.