US 11,109,781 B2
Arrayed waveguide grating (AWG)-based Raman spectroscopy for glucose monitoring
Sheng Yang, San Francisco, CA (US); Yen-Chun Yeh, Menlo Park, CA (US); and Dominik Schmidt, Los Altos, CA (US)
Filed by Sheng Yang, San Francisco, CA (US); Yen-Chun Yeh, Menlo Park, CA (US); and Dominik Schmidt, Los Altos, CA (US)
Filed on Feb. 6, 2018, as Appl. No. 15/890,206.
Claims priority of provisional application 62/457,646, filed on Feb. 10, 2017.
Prior Publication US 2018/0228411 A1, Aug. 16, 2018
Int. Cl. A61B 5/1455 (2006.01); G02B 6/136 (2006.01); G02B 6/42 (2006.01); G01J 3/44 (2006.01); G01J 3/18 (2006.01); A61B 5/145 (2006.01); G01N 21/65 (2006.01); G02B 6/12 (2006.01); G01J 3/02 (2006.01); A61B 5/00 (2006.01); G01J 3/28 (2006.01)
CPC A61B 5/1455 (2013.01) [A61B 5/14532 (2013.01); G01J 3/0256 (2013.01); G01J 3/1895 (2013.01); G01J 3/44 (2013.01); G01N 21/65 (2013.01); G02B 6/12002 (2013.01); G02B 6/12004 (2013.01); G02B 6/12014 (2013.01); G02B 6/136 (2013.01); G02B 6/4214 (2013.01); G02B 6/4298 (2013.01); A61B 5/0075 (2013.01); A61B 2562/0242 (2013.01); A61B 2562/12 (2013.01); G01J 2003/282 (2013.01)] 12 Claims
OG exemplary drawing
 
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.