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:
May. 27, 2003
Filed:
May. 12, 2000
Byeong-Hoon Kim, Kyonggi-do, KR;
Samsung Electronics Co. LTD, Suwon, KR;
Abstract
A device for providing a reference wavelength which is used in monitoring the performance of a WDM optical transmission system which includes a light emitting diode (LED) generating light in a predetermined wavelength band, a filter receiving the light from the LED and filtering an optical signal at a predetermined reference wavelength, a tap coupler extracting a portion of the optical transmission data, a coupler coupling the output of the tap coupler with the output of the filter, a sawtooth wave generator generating sawtooth waves in a voltage range which includes the reference wavelength and the different wavelengths of the optical transmission light, and a variable optical filter receiving the output of the coupler and the sawtooth waves and filtering the output of the coupler where the sawtooth waves overlap.