Method and apparatus for measuring chromatic dispersion

摘要: The present invention relates to a method and an apparatus for measuring optical property, such as group delay or chromatic dispersion, of DUT (50), comprising: first coupler (20) connected the (50) coupling signal (10) having wavelength ( lambda 1) second (11) ) into being variable with respect 1), detector (40) detecting leaving evaluation unit (40), determining difference in runtime, if any, between traveled at least one time through deriving property from detected difference.