Patent ID: 9625379
Date: 2017-04-18
CPC Classifications: G01J,G01N,G02B

Claim:
1. A gas sensor fabricated on a substrate that includes optical and electronic components, the sensor comprising: a laser configured to output light in a range of wavelengths within a waveguide; a splitter configured to split the light output by the laser to a reference waveguide and to a detection waveguide; the reference waveguide configured to expose the light to a reference gas and output a reference light, wherein the reference light exhibits a change in intensity from the light at wavelengths corresponding with an absorption spectrum of the reference gas; a reference cell configured to hermetically seal the reference gas and house the reference waveguide; the detection waveguide configured to expose the light to ambient gas; and first and second optical detectors configured to receive light output from the reference waveguide and the detection waveguide, respectively, wherein the ambient gas is identified based on outputs of the first detector and the second detector.