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:
Jul. 07, 2009
Filed:
Oct. 28, 2005
Yun Chur Chung, Daejeon, KR;
Eui Seung Son, Gyeonggi-do, KR;
Kyung Woo Lim, Daegu, KR;
Kwan Hee Han, Gyeonggi-do, KR;
Yun Chur Chung, Daejeon, KR;
Eui Seung Son, Gyeonggi-do, KR;
Kyung Woo Lim, Daegu, KR;
Kwan Hee Han, Gyeonggi-do, KR;
Korea Advanced Institute of Science and Technology, Daejeon, KR;
Abstract
A communication recovering system for a wavelength division multiplexed passive optical network (WDM PON). The communication recovering system can recover fault of optical fibers between the central office and the remote nodes without additional optical fibers by grouping two remote nodes and employing AWGs having periodic transmission characteristics, and can also simply and rapidly recover such a fault with minimal optical loss using 1×N structure of the AWGs and On-Off optical switches, although protection optical fibers are additionally installed therein. The communication recovering system has advantages in that it can simplify network structure, be cost-effectively implemented, reduce optical loss, and rapidly perform protection of optical fiber fault.