Semiconductor light-emitting device

A semiconductor light-emitting device, comprising:

• a substrate;
• a light-receiving chip arranged on the substrate and including a light-receiving element, the light-receiving element including a light-receiving surface formed in a chip front surface of the light-receiving chip;
• an edge-emitting chip bonded to the chip front surface at a position different from the light-receiving surface as viewed in a thickness-wise direction of the substrate and including a first light-emitting surface and a second light-emitting surface, the first light-emitting surface being configured to emit a first laser beam in a first direction intersecting the thickness-wise direction as viewed in the thickness-wise direction, the second light-emitting surface being configured to emit a second laser beam in a direction opposite to an emission direction of the first laser beam;
• a cover formed on the substrate by a material that allows passage of the first laser beam and the second laser beam, the cover covering at least part of the edge-emitting chip and at least part of the light-receiving chip;
• and
• a reflector included in the cover, the reflector being configured to reflect at least part of the second laser beam toward the light-receiving surface,
• wherein the light-receiving surface is formed in a position of the chip front surface that receives at least part of a light reflected by the reflector.