Arrayed waveguide grating (AWG)-based Raman spectroscopy for glucose monitoring

A method for non-invasive optical glucose monitoring using Arrayed Waveguide Grating (AWG)-based Raman spectrometer, the method comprising:

• receiving at an AWG a light within a Raman spectrum, wherein:
• the AWG comprises:
• a substrate;
• filled waveguide trenches on the substrate comprising an optical waveguide;
• and
• filled doped trenches on the substrate comprising a detector;
• and
• the light is light from a laser source that is scattered off human skin and directed by a prism toward the AWG;
• detecting, at the detector, light dispersed by the AWG;
• and
• using a signal processing device coupled to the detector to determine a glucose level based on the output of the detector.

A method for producing an Arrayed Waveguide Grating (AWG)-based Raman spectrometer, die method comprising:

• forming a first set of trenches on a substrate;
• filling the first set of trenches with first material that at least partially defines optical waveguides of an AWG, the first set of trenches serving as intrinsic regions of PIN diodes;
• forming a second set of trenches on a substrate;
• filling the second set of trenches with a second material that at least partially defines doped regions of the PIN diodes;
• electrically connecting the PIN diodes in a manner to facilitate the detection of photons;
• and
• integrating the optical waveguides of the AWG and the second set of trenches so as to form individual PIN diodes.