Monolithically integrated optical interferometer for refractometry

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Monolithically integrated optical interferometer for refractometry

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A monolithically integrated optical sensor chip for measurement of analyte refractive index changes has been demonstrated. The 5 × 0.15 mm2 GaAs/AlGaAs-based integrated optical circuit consists of a Mach-Zehnder interferometer with an integrated DBR laser, a waveguide detector and a dielectric waveguide sensor pad embedded in one interferometer arm.

Inspec keywords: refractive index measurement; gallium arsenide; III-V semiconductors; Mach-Zehnder interferometers; aluminium compounds; integrated optics; optical sensors

Other keywords: optical sensor chip; monolithically integrated optical interferometer; GaAs-AlGaAs; refractometry; analyte refractive index measurement; waveguide detector; DBR laser; GaAs/AlGaAs integrated optical circuit; dielectric waveguide sensor pad; Mach-Zender interferometer

Subjects: Optical interferometry; Integrated optics; Optical refractometry and reflectometry

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