Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1989-12-15
1995-03-14
Turner, Samuel
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
372 6, 372 20, 372 32, 372 94, G01B 902
Patent
active
053981111
ABSTRACT:
A fiber optic resonance gyroscope which has a laser diode as the coherent light source and employs direct optical feedback to that laser diode from light propagating in one direction around a fiber optic resonance ring operating in the peak resonance mode, to maintain the laser output locked to the resonance frequency of the ring. Light propagated around the fiber optical ring in the opposite direction is phase and frequency modulated before being coupled to the ring and a portion of that light exiting the ring is photodetected, the resultant electrical signal being demodulated and used as an error control signal to maintain the modulation frequency at a specific value related to the resonance frequency of the ring for light transmitted in that direction. This error control signal is taken as the gyroscope output of the system.
REFERENCES:
patent: 4274742 (1981-06-01), Lustig
patent: 4455780 (1984-05-01), Burns
patent: 4491413 (1985-01-01), Rashleigh
patent: 4530603 (1985-07-01), Shaw et al.
patent: 4661964 (1987-04-01), Haavisto
patent: 4702600 (1987-10-01), Hendrich
patent: 4863272 (1989-09-01), Coccoli
"Frequency Stabilization of Semiconductor Lasers by Resonant Optical Feedback" B. Dahmani et al, Optics/Letters/ vol. 12 No. 11/ Nov. 1987, Optical Soc. of America.
"Narrow Spectral Linewidth Semiconductor Optical-fiber Ring Laser"-Tai et al, American Institute of Physics, Appl. Phys. Lett. 49(20), 17 Nov. 1986.
"Passive Ring Resonator Method for Sensitive Inertial Rotation Measurements in Geophysics and relativity"-Sanders, et al. Optical Society of America, vol. 6 No. 11/ Nov. 1981 Optics Letter.
"Techniques for Shot-Noise-Limited Inertial Rotation Measurement Using a Multiturn Fiber Sagnac Interferometer"-Davis et al Laser Inertial Rotation Sensors (1978) SPIE Vo. 157.
"Technology Assessment of Passive Optical Gyros Part I and Overview of Concept Problems, and Approaches Part II,"-J. David Coccoli, The Charles Stark Draper Laboratory, Inc. Cambridge, Mass., Sep. 1982.
"Fiber Optic Laser Gyro Signal Detection and Processing Technique"-Martin et al,-Guided Wave Optical Systems and Devices (1978) SPIE vol. 139.
The Charles Stark Draper Laboratory Inc.
Turner Samuel
LandOfFree
Optically-locked fiber-optic resonant gyro does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optically-locked fiber-optic resonant gyro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optically-locked fiber-optic resonant gyro will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-716227