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:
Nov. 14, 2000
Filed:
Aug. 12, 1998
Applicant:
Inventor:
Kiichi Hamamoto, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385131 ;
Abstract
A semiconductor optical amplifier wherein poalization independent gain, high saturation input light intensity, and high saturation gain are obtained. The semiconductor optical amplifier of the present invention comprises a 1.times.1 multi mode interference (MMI) light waveguide region and a couple of single mode waveguide regions, each of which is connected with each end of the multi mode region. The length of the multi mode waveguide region is about 340 .mu.m and the length of the single mode waveguide regions is about 20 .mu.m. The width of the multi mode waveguide region is about 12 .mu.m while the widths of the single mode waveguide regions 2,3 are about 1 .mu.m.