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Title:
SEMICONDUCTOR OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2021/005700
Kind Code:
A1
Abstract:
The present invention is provided with: a light-emitting layer 10 that emits light in an electrical current injection state; an optical waveguide 20 in which the width or thickness thereof in an extension direction (y) of the light-emitting layer 10 changes along the extension direction; and a uniform diffraction grating 30 having a constant period, width, and depth. The light-emitting layer 10, the optical waveguide 20, and the uniform diffraction grating 30 are disposed at positions at which the light-emitting layer 10, the optical waveguide 20, and the uniform diffraction grating 30 are optically coupled. The uniform diffraction grating 30 is disposed above the light-emitting layer 10. The optical waveguide 20 is disposed below the light-emitting layer 10. The optical waveguide 20 includes, in the extension direction, a first portion having a prescribed width, a second portion having a larger width than the first portion, and a third portion having the same width as the first portion.

Inventors:
AIHARA TAKUMA (JP)
MATSUO SHINJI (JP)
TSUCHIZAWA TAI (JP)
HIRAKI TATSURO (JP)
Application Number:
JP2019/027095
Publication Date:
January 14, 2021
Filing Date:
July 09, 2019
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H01S5/12
Foreign References:
JPS61216383A1986-09-26
JPS63186A1988-01-05
JPH1051066A1998-02-20
JPH04229687A1992-08-19
JPH10223966A1998-08-21
JPS6189690A1986-05-07
JPH0629622A1994-02-04
JP2016171173A2016-09-23
US20160104997A12016-04-14
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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