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:
Sep. 03, 2019
Filed:
Jul. 25, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Takako Suga, Yokohama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A light emitting device, particularly a super luminescent diode, includes an active layer provided between upper and lower electrodes for injecting electric current into the active layer. The active layer functions as an optical waveguide and has first and second edge faces for emitting light. The device further includes first and second light receiving sections for receiving light emitted from the first and second edge faces respectively and generating first and second pieces of optical information respectively and a control section for controlling the current injection amount into the active layer from the upper electrode according to the first and second pieces of optical information. The optical output and the spectral shape of the device can be easily, accurately and reliably controlled in a short period of time.