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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/75451


    Title: Apparatus and method for monitoring extinction ratio of optical signals
    Authors: 楊淳良;Yang, Chun-liang;徐達儒;Hsn, Dar-zu
    Contributors: 淡江大學電機工程學系;工研院資通所
    Date: 2011-06-28
    Issue Date: 2012-03-27 14:45:31 (UTC+8)
    Abstract: An apparatus for monitoring extinction ratio (ER) of optical signals comprises an optical spectrum analyzing unit, an ER monitoring control unit and an ER monitoring output unit. The optical spectrum analyzing unit measures two peak values corresponding to level one and level zero of optical signals from an optical coupler, and obtains two wavelengths for the two peak values. The ER monitoring output unit outputs the difference of the two wavelengths to the ER monitoring control unit. With a relation formula of the wavelength difference, the ER monitoring control unit estimates an optimal resolution bandwidth for setting up the optical spectrum analyzing unit. As such, the optical spectrum analyzing unit measures two optical powers corresponding to level one and level zero of optical signals. With the two optical powers, the ER monitoring output unit computes an ER value.
    Appears in Collections:[電機工程學系暨研究所] 專利

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