教師資料查詢 | 類別: 專利 | 教師: 楊淳良 Yang, Chun-liang (瀏覽個人網頁)

標題:Apparatus and method for monitoring optical signal-to-noise ratio
學年93
學期1
專利開始日期2004/12/30
專利結束日期2004/12/30
作品名稱Apparatus and method for monitoring optical signal-to-noise ratio
作品名稱(其他語言)
著者楊淳良; Yang, Chun-liang; Lee, San-liang; Wu, Jui-ting; Yang, Ming-hsiao
單位淡江大學電機工程學系
著錄名稱、卷期、頁數
描述專利國別美國;United States Patent: 7,391,970;Application number: 11/026,352;國際分類號H04B 10/08
摘要An apparatus and a method for monitoring optical signal-to-noise ratio are provided. It can be applied in dense wavelength-division multiplexed networks to monitor the transmission quality of each optical channel. The apparatus comprises an optical circulator, a tunable optical filter, a dithering signal, a dithered reflector, and two photodiodes. It can be integrated on a single chip. The invention utilizes the dithering and reflection functions of the dithered reflector, and passes the signal and the noise through the tunable optical filter once and twice, respectively. When the tunable optical filter is scanning and filtering the whole spectrum, the signal and noise powers are measured by the two photodiodes, respectively. The OSNR for each optical channel is then calculated according to the signal and noise powers. It can monitor channel location, wavelength drift, and OSNR by including a wavelength locker to act as an optical channel analyzer.
關鍵字
語言英文
相關連結
Google+ 推薦功能,讓全世界都能看到您的推薦!