Optical Gyroscope with Time Dependent Wavelength.
DEPARTMENT OF THE NAVY WASHINGTON DC
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A Sagnac rotation sensing interferometer disposed on a rotating platform for use as a gyroscope comprising a wound optical fiber light depth, a beam splitter for splitting a light beam into two beams directed to traverse the optical path in opposite directions, a light source circuit for generating a light beam which is switched between two wavelengths at a switching or modulation frequency substantially higher than the speed of change of the phase due to rotation, and a detector for extracting a signal from the recombined beam interference pattern at the wavelength modulation frequency, this signal being proportional to the phase shift caused by rotation. Author
- Lasers and Masers
- Fiber Optics and Integrated Optics