Patent ID: 11971579
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. A multi-mode interferometric optical waveguide device, comprising:
a multi-mode interferometric optical waveguide which includes a reflective portion,
a first single-mode waveguide, and
a second single-mode waveguide, wherein
the reflective portion includes a first reflective surface and a second reflective surface,
the multi-mode interferometric optical waveguide has a first end, a second end opposite the first end, a first side connecting the first end and the second end, and a second side opposite the first side, the second side connecting the first end and the second end,
the first reflective surface is disposed at the second end,
the second reflective surface is disposed at the first end,
the first single-mode waveguide is connected to the first side, and opposes the second reflective surface,
the second single-mode waveguide is connected to the first side at a connection portion, and opposes the first reflective surface; and
an image forming portion for light output to the second single-mode waveguide is located at the connection portion,
wherein when light enters the first single-mode waveguide, the light is self-imaged in the connection portion.