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:
Apr. 10, 2001
Filed:
Apr. 26, 1999
Oki Electric Industry Co., Inc., Tokyo, JP;
Abstract
An object is to realize optical signal transmitter-receiver module with high transmitting power and high receiving sensitivity at a low cost. The optical signal transmitter-receiver module,includes a planar lightwave circuit (PLC),and a transmitter-receiver circuit. The PLC,is made up with a Si substrate,a laser diode (LD),generating the optical signal Pt, and a photodiode (PD),receiving the optical signal Pr. Both LD,and PD,are arranged on the Si substrate,The LD,is arranged such that its front face is located in the vicinity of an optical fiber,The LD,has an optical waveguide layer that is composed of an active layer generating the optical signal Pt and a clad layer functioning as a transparent layer to the optical signal Pr. The PD,is arranged such that its front face is located in the vicinity of the backside face of the LD,and receives the optical signal Pr having passed through the optical waveguide layer of the LD
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile