Method for controlling a polarization of light

Details Method for controlling a polarization of light Method for controlling a polarization of light

1990-03-12

1991-04-02

Arnold, Bruce Y.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

350371, 350388, 350389, 455616, E02F 103

Patent

active

050043129

ABSTRACT:
First to fifth birefringences are generated in series along a light propagating medium. The first to fifth birefringences have main axes of 0.degree., 45.degree., 0.degree., 45.degree. and 0.degree. relative to an arbitrary direction orthogonal to a light propagating direction of the medium. The magnitude of the birefringences are changed to change first to fifth phase differences. In an ordinary polarization control, the second to fourth phase differences are changed. However, one or both of the first and fifth phase differences are changed in a resetting operation for one of the second to fourth phase differences. Consequently, the phase differences are reset without the dependency on polarizations of an input light supplied to a polarization controller and an output light supplied from the polarization controller.

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patent: 4923290 (1990-05-01), Brinkmeyer et al.
patent: 4943132 (1990-07-01), Huang

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