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:
Mar. 07, 2006
Filed:
Mar. 15, 2004
Jong-deog Kim, Daejon, KR;
Byung-seok Choi, Daejon, KR;
Jong-hyun Lee, Daejon, KR;
Hogyeong Yun, Jeollabuk-Do, KR;
Kwang-seong Choi, Seoul, KR;
Jong-tae Moon, Jeollabuk-Do, KR;
Jong-Deog Kim, Daejon, KR;
Byung-Seok Choi, Daejon, KR;
Jong-Hyun Lee, Daejon, KR;
Hogyeong Yun, Jeollabuk-Do, KR;
Kwang-Seong Choi, Seoul, KR;
Jong-Tae Moon, Jeollabuk-Do, KR;
Abstract
A system for monitoring an optical output/wavelength is employed to be used for a WDM system having a narrow channel space by structuring an etalon and photodiode as an integrated structure. The system includes: a laser source control unit for controlling the laser source; an optical/wavelength monitoring unit for monitoring an optical output/wavelength of the controlled laser source; a TEC control unit for controlling a TEC in order to constantly maintain the laser source of the optical output/wavelength monitoring unit to have a predetermined temperature; a temperature control unit for controlling a heater and a thermistor to set an etalon to a predetermined temperature, wherein the heater is attached on the optical output/wavelength monitoring unit and the thermistor is attached on the heater; a comparison unit for comparing the optical output signal and the wavelength signal, each of which is monitored by the optical output/wavelength monitoring unit; and a processing unit for comparing values of the compared signals with a preset value to control an input current or a temperature of the laser source.