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Design of a full-dynamic-range balanced detection heterodyne gyroscope with common-path configuration
Chu-En Lin1, Chih-Jen Yu, Chii-Chang Chen
1Department of Optics and Photonics, National Central University, 32001 Jhongli, Taiwan.
Optics Express
|April 24, 2013
Summary
We developed a novel optical heterodyne common-path gyroscope offering a full-dynamic range. This innovative design overcomes limitations of traditional gyroscopes and shows potential for miniaturization into chip devices.
Area of Science:
- Photonics and Optical Engineering
- Inertial Navigation Systems
Background:
- Traditional interferometric fiber optic gyros lack full-dynamic range.
- Non-common-path heterodyne techniques face limitations like polarization rotation.
Purpose of the Study:
- To propose an optical heterodyne common-path gyroscope with full-dynamic range.
- To overcome drawbacks of existing gyroscope technologies.
- To demonstrate potential for miniaturization.
Main Methods:
- Utilizing a two-frequency laser light source (TFLS) for common-path configuration.
- Employing phase measurement for gyroscope operation.
- Theoretical analysis for bias stability calculation.
Main Results:
- Achieved a common-path configuration gyroscope with full-dynamic range.
- Eliminated polarization rotation issues common in single-mode fibers (SMFs).
- Demonstrated potential for miniaturization into chip-scale devices.
- Calculated a theoretical bias stability of 0.872 deg/hr under specific conditions (1550nm wavelength, 250m SMFs, 3.5cm fiber ring radius).
Conclusions:
- The proposed optical heterodyne common-path gyroscope offers significant advantages over traditional designs.
- The technology is suitable for miniaturization, paving the way for compact inertial sensors.
- The design effectively addresses limitations of existing fiber optic gyroscopes.
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