Gyroscope, Fiber Optic, Interferometer
Saturday, September 09, 2006
A Interferometer Fiber Optic Gyro has been designed and developed with up to 1 km (0.6 mi) of Fiber Optic wound into a coil with both ends brought into a coupler. Light from the laser light source passes through a power splitter / coupler and a mode filter and then into an integrated optics circuit containing an interfering coupler / Y-junction. The interfering coupler splits the laser light beam into counter propagating beams, and then recombines the laser light beams after they have propagated through the Fiber Optic coil. The recombined laser light beams then retraces the path through the mode filter and into an optical photodetector thru the power splitter. This ensures that both laser light beams have traveled identical paths. Backscatter errors are minimized by using a wide-band laser light source.
The input rotation rate of the gyro changes and is detected by the photodetector. The feedback loop provides a signal to the frequency shifter, which changes the frequency in the opposite direction so that the photodetector reads a null position. The output of the Gyroscope is a frequency signal, which is proportional to Gyroscope’s angle, and the Gyroscope is acting an integrator.
Source: Various Publications
Reference: None Available
Industrial Products
posted by JD52 @ 1:11 PM,
