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. 07, 1997
Filed:
Dec. 04, 1995
Akira Takemoto, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical integrated circuit device includes a compound semiconductor substrate, a semiconductor laser including a compound semiconductor layer, a waveguide of a compound semiconductor layer having the same energy band gap as that of the semiconductor laser, a semiconductor amplifier having the same energy band gap as that of the semiconductor laser, a common electrode disposed on the rear surface of the substrate, a semiconductor laser electrode for current flow between the laser electrode and the common electrode so that the current is injected into the laser, a waveguide electrode for current flow between the waveguide electrode and the common electrode so that the current is injected into the waveguide, and a semiconductor amplifier electrode for current flow between the amplifier electrode and the common electrode so that the current is injected into the amplifier. Therefore, the compound semiconductor layers constituting the semiconductor laser, the waveguide, and the amplifier are grown as a single layer and the optical integrated circuit device is easily fabricated, and an absorption loss in the waveguide is suppressed by applying a voltage across the common electrode and the waveguide electrode to inject current into the waveguide.