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. 22, 2002
Filed:
Oct. 29, 1999
Other;
Abstract
An apparatus and a method for detecting channel information from wavelength division multiplexed (WDM) optical signals by using a wavelength selective photo detector. This apparatus and method can monitor channel status in a simple, rapid and economical way. The apparatus includes: pre-processor for pre-processing WDM optical signals and outputting a portion of the WDM optical signals; a photo detector for converting the WDM optical signal from said pre-processor a first electrical signal having a constant value regardless of wavelengths of the WDM optical signal; a wavelength selective photo detector for converting the WDM optical signal from said pre-processor into a second electrical signal having a different value in response to the wavelength of the distributed optical signal; lookup table; normalization part for normalizing the second electrical signal with respect to the first electrical signal; channel number detector for detecting a number of channels using the electrical power for one channel and power of the first electrical signal; and channel location detector for detecting channel location by using normalized electrical signals and electrical power values stored in said lookup table.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile