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AssigneeAdvantest Corporation
InventorTomoyu Yamashita
Estimating the term…
An apparatus is provided which is capable of measuring the polarization mode dispersion of an objective without changing a wavelength of an angle frequency of light incident upon the objective. The apparatus comprises a variable wavelength light source 10 generating an incident light, a light modulator 54 modulating the incident light on the basis of the frequency f of the signal for modulation oscillated from an oscillator 52 and outputting the modulated light, a polarization controller 20 polarizing the modulated light, changing a polarizing condition so that an modulated light polarizing is passed through the axes having a minimum and a maximum propagation group velocity of the light in DUT 30, and outputting the polarized light for incidence, a phase comparator 64 measuring the phase difference φ between a phase φs of the transmitted light which the polarized light for incidence is transmitted through DUT 30 and a phase φr of the signal for modulation and a polarization mode dispersion measuring unit 66 calculating the polarization mode dispersion of DUT 30 from the phase difference φ. The apparatus is capable of measuring of the polarization mode dispersion without changing the wavelength of the incident light and if the wavelength of the incident light is changed, it is capable of measuring the wavelength dependent characteristic of the polarization mode dispersion.
An apparatus for measuring a polarization mode dispersion of the objective which transmits the light, comprising:
A method for measuring a polarization mode dispersion of the objective which transmits the light, comprising:
A computer-readable medium having a program of instructions for execution by the computer to perform a measuring processing for measuring a polarization mode dispersion of the objective which transmits the light, said measuring processing comprising:
An apparatus for outputting a light, comprising:
Dependencies are inferred from the claim text.