OSNR monitoring method and apparatus for the optical networks광통신망을 위한 광신호대 잡음비 감시방법 및 장치

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It is disclosed that a method and apparatus that automatically monitors each channel's optical signal-to-noise ration (OSNR) using optical filter and polarization extinction method in wavelength division multiplexing (WDM) scheme-based optical transmission systems. OSNR is simply measured using optical filter by comparing amplified spontaneous emission (ASE) over the signal band, of which bandwidth has changed, while leaving signal intensity intact, with that original signal and, OSNR measurement is allowable over a wider range of OSNR by minimizing the ratio of signal to ASE over the signal band using polarization extinction method.
Assignee
TeraLink Communications, Inc.
Country
US (United States)
Issue Date
2007-02-13
Application Date
2001-11-09
Application Number
10148438
Registration Date
2007-02-13
Registration Number
7177541
URI
http://hdl.handle.net/10203/232446
Appears in Collection
EE-Patent(특허)
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