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:
Jun. 28, 2022
Filed:
Oct. 02, 2018
Hamamatsu Photonics K.k., Hamamatsu, JP;
Yoshitaka Kurosaka, Hamamatsu, JP;
Kazuyoshi Hirose, Hamamatsu, JP;
Takahiro Sugiyama, Hamamatsu, JP;
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Abstract
A semiconductor light emitting element that can form a useful beam pattern is provided. A semiconductor laser element LD includes an active layer, a pair of cladding layersandbetween which the active layeris interposed, and a phase modulation layeroptically coupled to the active layer. The phase modulation layerincludes a base layerA and different refractive index regionsB that are different in refractive index from the base layerA. The different refractive index regionsB desirably arranged in the phase modulation layerenable emission of laser light including a dark line with no zero-order light.