US Patent Application 18124952. LIGHT RECEIVING DEVICE AND LIGHT RECEIVING APPARATUS simplified abstract

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LIGHT RECEIVING DEVICE AND LIGHT RECEIVING APPARATUS

Organization Name

SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor(s)

Takuya Okimoto of Osaka-shi (JP)

Hideki Yagi of Osaka-shi (JP)

Takuya Mitarai of Osaka-shi (JP)

LIGHT RECEIVING DEVICE AND LIGHT RECEIVING APPARATUS - A simplified explanation of the abstract

This abstract first appeared for US patent application 18124952 titled 'LIGHT RECEIVING DEVICE AND LIGHT RECEIVING APPARATUS

Simplified Explanation

The patent application describes a light receiving device that includes a semiconductor substrate and a metal pattern layer.

  • The device has a first major surface and a second major surface, with the metal pattern layer provided on the second major surface.
  • The first major surface has a first input port for signal light, a second input port for local oscillation light, a first light receiving element, an optical 90 degree hybrid element, and a second light receiving element.
  • The metal pattern layer contains either titanium or chromium.

Bullet points:

  • The device is designed to receive and process signal light and local oscillation light.
  • The first light receiving element is optically coupled to the first input port, allowing it to receive the signal light.
  • The optical 90 degree hybrid element is optically coupled to both the first input port and the second input port, allowing it to combine the signal light and local oscillation light.
  • The second light receiving element is optically coupled to the optical 90 degree hybrid element, allowing it to receive the combined light.
  • The metal pattern layer on the second major surface of the semiconductor substrate contains either titanium or chromium, which may have specific properties or functions in the device.


Original Abstract Submitted

A light receiving device includes a semiconductor substrate having a first major surface and a second major surface opposite to the first major surface, and a metal pattern layer provided on the second major surface. The first major surface is provided with a first input port configured to receive an input of signal light, a second input port configured to receive an input of local oscillation light, a first light receiving element optically coupled to the first input port, an optical 90 degree hybrid element optically coupled to the first input port and the second input port, and a second light receiving element optically coupled to the optical 90 degree hybrid element. The metal pattern layer contains at least one of titanium or chromium.

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