06928243 is referenced by 7 patents and cites 6 patents.

The optical performance monitoring apparatus includes a first optical distributor for distributing a WDM optical signal branched from an optical transmission line, a plurality of wavelength selectors, each for selecting a predetermined wavelength optical signal from the optical signal distributed, a plurality of first optical detectors, each for detecting power of the predetermined wavelength optical signal for a corresponding one of channels selected by the wavelength selectors; and a signal processor for measuring the power for each channel of the WDM optical signal, a total ASE noise power, and an optical signal-to-noise ratio for each channel from the digital value.

Title
Optical performance monitoring apparatus for a WDM optical communication system
Application Number
9/736267
Publication Number
6928243 (B2)
Application Date
December 15, 2000
Publication Date
August 9, 2005
Inventor
Jong Hyun Lee
Taejon
KR
Kwang Joon Kim
Taejon
KR
Sung Un Lee
Taejon
KR
Ji Wook Youn
Taejon
KR
Agent
Moser Brown Rowe & Maw
Assignee
Electronics and Telecommunications Research Institute
KR
IPC
H04B 010/08
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