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:
Jun. 01, 2004
Filed:
Jun. 13, 2002
Applicant:
Inventors:
Tomofumi Kise, Tokyo, JP;
Masaki Funabashi, Tokyo, JP;
Assignee:
The Furukawa Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/100 ;
U.S. Cl.
CPC ...
H01L 2/100 ;
Abstract
A method for forming a set of DFB lasers includes the steps of forming active layers having different peak gain wavelengths, measuring the peak gain wavelengths of the active layers, and forming diffraction gratings having periods based on the measured peak gain wavelengths, the periods allowing the detuning amount of the DFB laser device to fall within a design value.