Gyroscope, Fiber Optic, Beamsplitter
Saturday, September 09, 2006
A Fiber Optic Gyroscope has been designed and developed consisting of a pigtailed Laser Diode spliced into a Fiber Optic Beamsplitter.
The Beamsplitter acts as the input / output device for the Gyroscope, with one leg of the Beamsplitter attached to an output detector. The second leg of the Beamsplitter is used to align the monitor by power coupling it to the Laser Diode. The third leg acts as a light filter coupled into the Gyroscope. The light beam to the Beamsplitter is collimated by a ferrule / graded index lens and then through a Polarizer. The Beamsplitter splits the polarized light beam into its two polarized components. One polarized beam is shifted in frequency by an Acousto Optic Modulator. It is coupled into the end of the Fiber Optic coil by a graded index lens. The light beam goes through a phase modulator formed by a length of Fiber Optic wound around a piezoelectric cylinder. The cylinder is oscillated to provide modulation to the polarized light beam. The Beamsplitter recombines the clockwise circulating and counterclockwise circulating polarized light beams. The Beamsplitter directs this combined light beam to the output signal photodetector.
Source: "Scale factor correction in the phase-nulling optical gyro”, by E. Udd, R. J. Michal, and R. F. Cahill, Optical Engineering,; E. Udd, R. J. Michal, and R. F. Cahill, McDonnell Douglas Astronautics Company, Huntington Beach, CA.
Reference: None Available
Industrial Products
posted by JD52 @ 1:02 PM,
