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Dar-Zu

Dar-Zu Hsn, Tainua TW

Patent application numberDescriptionPublished
20100149521Apparatus And Method For Monitoring Extinction Ratio Of Optical Signals - 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.06-17-2010

Dar-Zu Hsu, Tai-Nan Hsien TW

Patent application numberDescriptionPublished
20080309938Apparatus And Method Of Non-Sampling-Based Q-Factor Measuring - A non-sampling-based Q-factor measuring apparatus and method use a power conversion module to transform the power variation of inputted optical signals in time domain into the variation in other domains, such as optical wavelength, optical polarization and different output ports of optical elements. Taking optical wavelength as an example, different levels of power variation respond different outputs of wavelength variation through the use of a power-to-wavelength conversion module. An optical filter then separates the inputted optical signals with different wavelengths. The power average of a wavelength for its corresponding optical signals is further calculated by a photo detector. Thereby, the information of the power variation for the inputted optical signals at levels 1 and 0 can be obtained, and the Q-factor for the inputted optical signals is easily measured.12-18-2008
20080312872Apparatus And Method Of Non-Sampling-Based Q-Factor Measuring - A non-sampling-based Q-factor measuring apparatus and method use a power conversion module to transform the power variation of inputted optical signals in time domain into the variation in other domains, such as optical wavelength, optical polarization and different output ports of optical elements. Taking optical wavelength as an example, different levels of power variation respond different outputs of wavelength variation through the use of a power-to-wavelength conversion module. An optical filter then separates the inputted optical signals with different wavelengths. The power average of a wavelength for its corresponding optical signals is further calculated by a photo detector. Thereby, the information of the power variation for the inputted optical signals at levels 1 and 0 can be obtained, and the Q-factor for the inputted optical signals is easily measured.12-18-2008

Dar-Zu Hsu, Xigang Village TW

Patent application numberDescriptionPublished
20080298807SYSTEMS AND METHODS FOR INTERFERENCE PREDICTION - An optical network device of a passive optical network is introduced. The optical network device includes a light source, a control unit, and a variable optical attenuator. The light source can generate an optical signal. The control unit can generate a magnetic signal based on a control signal capable of providing information relating to a distance between the optical network device and an optical line termination. The variable optical attenuator can adjust a polarization angle of the optical signal based on the magnetic signal.12-04-2008