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:
Feb. 17, 1998
Filed:
Feb. 26, 1996
Tadashi Taniguchi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A laser coupler comprises photodiodes formed on a photodiode IC, a microprism mounted on the photodiode IC to lie on the photodiodes, and a semiconductor laser mounted nearby on the photodiode IC such that a beam of light entering into the microprism through its incident surface is bifurcated and introduced onto the photodiodes. A difference between the amount of incident light to one of the photodiodes and the amount of incident light to the other of the photodiodes is corrected by adjusting a difference between the gain of a current-voltage converter amplifier coupled to one of the photodiodes and the gain of a current-voltage converter amplifier coupled to the other photodiode. Thus, the laser coupler can be fabricated economically.