Ring laser gyro and method for driving ring laser gyro

Details Ring laser gyro and method for driving ring laser gyro Ring laser gyro and method for driving ring laser gyro

G - Physics

01

C

G01C 19/66 (2006.01)

Patent

CA 2325229

A ring laser gyro wherein a first and a second laser beam propagate with propagating directions different with-each other comprises electrode areas on an optical waveguide configuring the ring laser and controls an current injected or a voltage applied to the electrode areas, wherein the oscillating frequencies of the first and second laser beams are different from each other, thereby causing an increase and a decrease in the beat frequency enabling to detect the direction and the speed of a rotation at the same time. With regards to a method for detecting a rotation, the anode of the laser gyro is connected to an operational amplifier. Since the signal outputted from the operational amplifier has a frequency corresponding to the angular speed, it is converted into the voltage by a frequency-voltage conversion circuit so as to detect a rotation. This same method can be used for other types of gyros such as a semiconductor laser gyro, a gas lager gyro and the like.

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