The invention discloses an integrated
waveguide optical biochemical sensor based on luminous power specific value
demodulation and belongs to the technical field of
optical sensing. The integrated
waveguide optical biochemical sensor comprises a light path part, a sensing
branch and a circuit part, wherein light
waves output by a
laser device enter a first optical
waveguide directional coupler through a first straight optical waveguide to be divided into two paths; the two paths respectively enter a sensing
branch optical waveguide and a reference
branch optical waveguide; the concentrations of biochemical samples to be detected are different and the optical wave phase changing amounts are different; the light
waves which are transmitted by the sensing branch optical waveguide and the reference branch optical waveguide enter a second optical waveguide directional coupler of a branch to be coupled and divided; an obtained optical
signal is converted into optical current through a photoelectric
detector and enters a data acquiring and
processing unit to be converted into luminous power; specific values of the two paths of the luminous power are demodulated so that the concentration of the biochemical sample to be detected is obtained. Based on a photoelectric integration technology, all parts are integrated into one
chip so that the size of an optical biochemical sensing detection device is reduced; the integrated waveguide optical biochemical sensor has the advantages of high stability and simplicity and convenience in operation.