The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 2021
Filed:
Jun. 25, 2019
Hamamatsu Photonics K.k., Hamamatsu, JP;
Yoshitaka Kurosaka, Hamamatsu, JP;
Yuu Takiguchi, Hamamatsu, JP;
Takahiro Sugiyama, Hamamatsu, JP;
Kazuyoshi Hirose, Hamamatsu, JP;
Yoshiro Nomoto, Hamamatsu, JP;
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Abstract
In a semiconductor light emitting element provided with an active layer, a pair of cladding layersbetween which the active layeris interposed, and a phase modulation layeroptically coupled to the active layer, the phase modulation layerincludes a base layerA and a plurality of different refractive index regionsB having different refractive indices from the base layerA. When an XYZ orthogonal coordinate system having a thickness direction of the phase modulation layeras a Z-axis direction is set and a square lattice of a virtual lattice constant a is set in an XY plane, each of the different refractive index regionsB is disposed so that a centroid position G thereof is shifted from a lattice point position in a virtual square lattice by a distance r, and the distance r is 0<r≤0.3a.