Automatic optical bias control for light modulators

Details Automatic optical bias control for light modulators Automatic optical bias control for light modulators

G - Physics

02

F

325/1, 345/60

G02F 2/00 (2006.01) G02F 1/01 (2006.01) G02F 1/33 (2006.01)

Patent

CA 1057841

AUTOMATIC OPTICAL BIAS CONTROL FOR LIGHT MODULATORS Abstract of the Disclosure In an electro-optic laser beam modulation system wherein the polarization modulation of the laser beam is converted into intensity modulation by an analyzer positioned in the path of the beam, a pair of photo- electric detectors detects a portion of the input and output beams. A divisor registers the ratio between the intensities detected. A compensator rotates the polarization of the output beam to establish a desired ratio, and a comparison system is connected to the divisor and the compensator to maintain the desired ratio. -1-

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