an optical waveguide chip mounted on a main substrate and connected to an optical fiber, the optical waveguide chip comprising an arrayed waveguide diffraction grating;

a reflection portion fixed to a position on the main substrate at which the reflection portion faces a light emission end surface of the optical waveguide chip on a side from which light is output to an external space, the reflection portion comprising a reflection surface that faces the light emission end surface and is inclined with respect to a plane of the main substrate such that a reflection direction is toward an upper side of the main substrate; and

a light conversion portion comprising a conversion material configured to convert near infrared light to visible light, wherein the light conversion portion is arranged adjacent to the light emission end surface of the optical waveguide chip.