可視域アレイ導波路格子を用いた小型分光センサの設計と環境センシングへの応用

抄録

We have proposed a compact spectroscopic sensor based on the arrayed waveguide grating (AWG) with the use of a wavelength multi/demultiplexer in a photonic network. We fabricated a new planar sensor using a visible AWG for spectroscopic sensing of absorption characteristics with multiple dicing grooves for accommodating a liquid sample. A parabola-shaped sample injection waveguide is effective for improving the sensitivity because diffraction loss in the direction of its substrate is reduced. In this research, discrimination of chlorophyll a and b as test samples is to be investigated using the AWG spectroscopic sensor with a parabolashaped sample injection waveguide.