G - Physics – 02 – F
Patent
G - Physics
02
F
G02F 1/061 (2006.01) G02F 1/01 (2006.01) G02F 1/03 (2006.01)
Patent
CA 2293029
Broad wavelength tuning range are achieved in an effectively reset-free, optical, automatic polarization controller by providing a device and method for varying the polarization of an input beam of light. A block of electro-optic material has two pairs of electrodes for applying a voltage across the block. Light is launched into an input end of the block for receiving the input beam of light. A controller controls a quadrature voltage applied to the first and a second pair of electrodes; the quadrature voltage has the form of a magnitude and an angle. The quadrature voltage can be varied in such a manner as to orient a given electric field within the electro-optic material through a plurality of angles, for example between 0 and 2.pi. radians; the magnitude of the quadrature voltage can be set to create an arbitrary retardance from 0 to 2.pi.. Any output polarization state can be realized by appropriately varying the magnitude and angle of the voltage applied to the Vx and Vy electrodes.
Bismuth Jacques
Colbourne Paul
Iyer Rajiv
Trzecieski Michael
Jds Uniphase Inc.
Teitelbaum & Maclean
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