Polarization mode dispersion measuring instrument and method

Details Polarization mode dispersion measuring instrument and method Polarization mode dispersion measuring instrument and method

1997-03-17

1998-02-10

Pham, Hoa Q.

Optics: measuring and testing

By polarized light examination

250225, G01J 404

Patent

active

057174890

ABSTRACT:
A polarization mode dispersion measuring apparatus includes a variable wavelength light source for providing light of a variety of wavelengths; a light intensity modulator optically connected to the light source to provide light of modulated intensity; a polarization controller optically connected to the light intensity modulator to provide light of controlled polarization; a beam splitter optically connected to the polarization controller to provide beams of p and s polarization components; an O/E conversion unit optically connected to the beam splitter to provide electrical signals with respect to the beams of the p and s polarization components; and an analyzing unit for controlling the light intensity modulator to provide a sine wave of a predetermined frequency and a predetermined intensity, and the light source and the polarization controller to determine parameters of Jones matrix from the electrical signals and a polarization mode dispersion defined by the parameters, thereby measuring a polarization mode dispersion of an object placed between the polarization controller and the beam splitter.

REFERENCES:
patent: 5227623 (1993-07-01), Heffner
patent: 5298972 (1994-03-01), Heffner
patent: 5371597 (1994-12-01), Favin et al.

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