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:
Jan. 24, 2012
Filed:
Aug. 22, 2007
Bin-yeong Yoon, Daejeon, KR;
Bong-kyu Kim, Daejeon, KR;
Dong-soo Lee, Gwangju, KR;
Mun-seob Lee, Gwangju, KR;
Jong-deog Kim, Gwangju, KR;
Bong-tae Kim, Daejeon, KR;
Bin-Yeong Yoon, Daejeon, KR;
Bong-Kyu Kim, Daejeon, KR;
Dong-Soo Lee, Gwangju, KR;
Mun-Seob Lee, Gwangju, KR;
Jong-Deog Kim, Gwangju, KR;
Bong-Tae Kim, Daejeon, KR;
Abstract
Provided are an optical output power control method that provides optical communication without harming the human body even when a transmission line is cut or no optical network unit (ONU) accesses a communication system, and a passive optical network (PON) system using the method. In the method, an optical signal having a predetermined period is transmitted when an optical communication system is in an abnormal state, wherein the predetermined period includes a laser-on time interval in which the optical signal has a normal power level and a laser-off time interval in which the optical signal is off or has a power level lower than the normal power level, so that the optical communication system performs optical communication without harming the human body even during the abnormal state.