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. 06, 2007
Filed:
Jul. 01, 2004
Applicants:
Dong Churl Kim, Daejeon, KR;
Dae Su Yee, Daejeon, KR;
Young Ahn Leem, Daejeon, KR;
Kyung Hyun Park, Daejeon, KR;
Inventors:
Dong Churl Kim, Daejeon, KR;
Dae Su Yee, Daejeon, KR;
Young Ahn Leem, Daejeon, KR;
Kyung Hyun Park, Daejeon, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A light source has a structure in which a 3-dB beam splitter is integrated with a Febry-Perot laser diode having a cleaved plane. A first waveguide grating and a first refractive index modifier changing a Bragg wavelength of the first waveguide grating are provided at one branch of the 3-dB beam splitter. A second waveguide grating and a second refractive index modifier changing a Bragg wavelength of the second waveguide grating are provided at another branch of the 3-dB beam splitter.