WAVELENGTH SENSOR FOR FIBER OPTIC GYROSCOPE
Assignee
US Government
Filed as: UNITED STATES OF AMERICA, THE, AS REPRESENTED BY THE SECRETARY OF THE NAVY
Filed
May 28, 1991
Granted
Nov 15, 1994
Location
RIDGECREST CA US
Abstract
An error compensated Mach-Zehnder Interferometer wavelength sensor integrd fiber optic chip for scale factor correction of fiber optic gyroscopes. A 90° twisted optical fiber polarizer couples the light from a point in the gyroscope optical fiber circuit where light is found to have traversed the optical sensing coil of the gyroscope in both directions to the input of the fiber optic Mach-Zehnder Interferometer. The light output of the interferometer is converted to electrical signals which are used to servo lock the peak depth of phase modulation of the interferometer and provide a digital output corresponding to the wavelength change sensed by the gyroscope. Temperature and input power variations otherwise adversely affecting the gyroscope performance are thus compensated. Gyro resolution is maintained to within 1Å without temperature stabilization or output conditioning over the entire temperature range of operation.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jul 17, 1991
Rescinded
May 23, 1994
Duration
2 years, 10 months
Inventor
- 1MICHAEL D. BRAMSON
Technology Domains
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Record Details
- Patent number
- US 5365338
- Application
- 07706506
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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