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:
Oct. 29, 2019
Filed:
Mar. 17, 2017
Mitsubishi Electric Corporation, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A laser oscillation apparatus includes a wave plate and a diffraction grating disposed between a laser beam source and a partial reflection mirror. The wave plate changes polarization directions of laser beams emitted from semiconductor lasers to a second direction perpendicular to a first direction. The diffraction grating is disposed at a position where laser beams polarized in the first direction are superposed into one beam and laser beams whose polarization directions are changed to the second direction are superposed into one beam, superposes laser beams polarized in the first direction to have one optical axis, superposes laser beams polarized in the second direction to have one optical axis, and outputs superposed laser beams toward the partial reflection mirror. The laser oscillation apparatus includes a birefringent element to combine laser beams having mutually different optical axes output from the partial reflection mirror into one laser beams having one optical axis.