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. 26, 1991
Filed:
Mar. 15, 1990
Eiichi Nishimura, Tokyo, JP;
Yasuaki Tamura, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A fiber input/output type semiconductor optical amplifier module is disclosed. The optical amplifier module of the present invention, a semiconductor laser amplifier chip is provided for direct amplification of signal light beam. An optical coupling between the semiconductor laser chip and an input/output fibers is taken with a remote coupling using a parallel light beam. Collimator lenses are provided for converting the lightwave signal into a parallel light beam. Two optical isolators are provided for preventing a self-lasing of the semiconductor laser chip. One of the isolators is inserted on an input side of the semiconductor laser chip, and the other is inserted on an output side of the chip. An interference filter and a beam splitter are disposed in the output side of the semiconductor laser chip. The beam splitter splits the output signal of the semiconductor laser chip for monitoring an output power of the chip.