Non-invasive substance analyzer

A non-embedded type non-invasive substance analyzer for analyzing substance included in a human body without being embedded in the human body to check a blood glucose level, the non-invasive substance analyzer comprising:

• an optical waveguide circuit having a first main surface including a sample mounting region and a second main surface opposite to the first main surface;
• an excitation light source that emits excitation light toward a sample mounted on the sample mounting region from a vertical direction with respect to the sample mounting region;
• a probe light source that emits probe light;
• a first light intensity detector;
• and
• a first thermoregulator,
• wherein the optical waveguide circuit includes a first optical waveguide to which the probe light is incident from one end side to the other end side, a waveguide-type ring resonator which is optically coupled to the first optical waveguide, and a second optical waveguide which is optically coupled to the waveguide-type ring resonator and in which the probe light via the waveguide-type ring resonator propagates from the other end side to the one end side,
• in a plan view of the first main surface, the sample mounting region to which the excitation light is emitted from the excitation light source in the vertical direction is located inside the waveguide-type ring resonator,
• the probe light source and the first light intensity detector are located on the one end side with respect to the sample mounting region and the waveguide-type ring resonator,
• the first light intensity detector is optically coupled to the second optical waveguide on the one end side and detects an intensity of first light which is a part of the probe light and is optically coupled to the second optical waveguide, and
• the first thermoregulator regulates a temperature of the waveguide-type ring resonator.

A non-embedded type non-invasive substance analyzer for analyzing substance included in a human body without being embedded in the human body to check a blood glucose level, the non-invasive substance analyzer comprising:

• an optical waveguide circuit having a first main surface including a sample mounting region and a second main surface opposite to the first main surface;
• an excitation light source that emits excitation light toward a sample mounted on the sample mounting region from a vertical direction with respect to the sample mounting region;
• a probe light source that emits probe light;
• and
• a first light intensity detector,
• wherein the optical waveguide circuit includes a first optical waveguide to which the probe light is incident from one end side to the other end side, a waveguide-type ring resonator which is optically coupled to the first optical waveguide, a second optical waveguide which is optically coupled to the waveguide-type ring resonator and in which the probe light via the waveguide-type ring resonator propagates from the other end side to the one end side, a substrate which supports the waveguide-type ring resonator, and a thermal insulation member which has a smaller thermal conductivity than the substrate,
• in a plan view of the first main surface, the sample mounting region to which the excitation light is emitted from the excitation light source in the vertical direction is located inside the waveguide-type ring resonator,
• a recess that overlaps with the waveguide-type ring resonator in a plan view of the first main surface is provided on a surface of the substrate facing the waveguide-type ring resonator,
• the recess is filled with the thermal insulation member,
• the probe light source and the first light intensity detector are located on the one end side with respect to the sample mounting region and the waveguide-type ring resonator, and
• the first light intensity detector is optically coupled to the second optical waveguide on the one end side and detects an intensity of first light which is a part of the probe light and is optically coupled to the second optical waveguide.