Title:
OPTICAL POWER FEED CONVERTER
Document Type and Number:
WIPO Patent Application WO/2023/248372
Kind Code:
A1
Abstract:
[Problem] To provide an optical power feed converter that can reduce wasted light in the light input through an optical fiber cable to semiconductor light-receiving elements, which are obtained by dividing a circular light-receiving portion into equal portions radially with respect to center thereof and which are connected in series, and that can ensure even incidence. [Solution] An optical power feed converter (1) converts light (L1) input through an optical fiber cable into a photocurrent using a semiconductor light-receiving element (10) and outputs the photocurrent, wherein light enters the semiconductor light-receiving element (10) from a second surface (20b) side of a semiconductor substrate (20), which is the back surface with respect to a circular light-receiving portion (12) on a first surface (20a) side, the circular light-receiving portion (12) includes a plurality of photodiodes (14) that are equally divided by a plurality of linear isolation grooves (13) extending from the center (C) of the circular light-receiving portion and that are connected in series, and a conical recess (16) that decreases in diameter toward the first surface (20a) side is formed correspondingly to the circular light-receiving portion (12) at the second surface (20b) side of the semiconductor substrate (20) and configured so that the incident light is converted into an annular shape at the conical recess (16) and falls with equal light quantity on each of the plurality of photodiodes (14).
Inventors:
ISOMURA TAKATOMO (JP)
OMURA ETSUJI (JP)
OMURA ETSUJI (JP)
Application Number:
PCT/JP2022/024829
Publication Date:
December 28, 2023
Filing Date:
June 22, 2022
Export Citation:
Assignee:
KYOTO SEMICONDUCTOR CO LTD (JP)
International Classes:
H01L31/0232; H01L31/054
Foreign References:
| JPH02224375A | 1990-09-06 | |||
| JPH10117012A | 1998-05-06 | |||
| US20140318620A1 | 2014-10-30 | |||
| US20110108082A1 | 2011-05-12 | |||
| CN102184999A | 2011-09-14 | |||
| CN104037178A | 2014-09-10 |
Attorney, Agent or Firm:
OKAMURA Toshio (JP)
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