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:
Oct. 06, 2009
Filed:
Oct. 17, 2005
Sahng Gi Park, Daejeon, KR;
Su Hwan OH, Daejeon, KR;
Kwang Seong Choi, Seoul, KR;
Moon Ho Park, Daejeon, KR;
Yong Soon Baek, Daejeon, KR;
Kwang Ryong OH, Daejeon, KR;
Sahng Gi Park, Daejeon, KR;
Su Hwan Oh, Daejeon, KR;
Kwang Seong Choi, Seoul, KR;
Moon Ho Park, Daejeon, KR;
Yong Soon Baek, Daejeon, KR;
Kwang Ryong Oh, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
A channel switching function is added to a wavelength division multiplexing passive optical network (WDM-PON) system, which is an access optical network system, and the potential transmission rate is increased by combining wide wavelength tunable lasers and a time division multiplexing (TDM) data structure and properly using the necessary optical components. In addition, when the wavelength of a light source or an arrayed waveguide grating (AWG) changes, the wavelength is traced and the magnitude of a transmitted signal is maximized without an additional detour line using a loop-back network structure. Furthermore, fewer thermo-electric controllers (TECs) are required for stabilizing the temperature of an optical line terminal (OLT) using wavelength tunable lasers, each laser electrically changing its wavelength.