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Reduction of backscattering noise in a resonator integrated optic gyro by double triangular phase modulation
Applied Optics
|May 14, 2015
Summary
Double triangular phase modulation (DTPM) significantly reduces backscattering noise in resonator integrated optic gyros (RIOGs). This advanced technique achieves superior carrier suppression, enhancing RIOG performance and bias stability.
Area of Science:
- Optics
- Photonics
- Inertial Navigation
Background:
- Resonator Integrated Optic Gyros (RIOGs) require high carrier suppression to mitigate backscattering noise.
- Backscattering noise degrades the performance and accuracy of optical gyroscopes.
Purpose of the Study:
- To introduce and analyze a novel Double Triangular Phase Modulation (DTPM) technology for reducing backscattering noise in RIOGs.
- To optimize DTPM parameters for enhanced carrier suppression and relaxed operational requirements.
Main Methods:
- Theoretical analysis and numerical simulations of the DTPM principle.
- Optimization of modulation parameters based on simulation results.
- Experimental validation of DTPM's carrier suppression and its impact on RIOG bias stability.
Main Results:
- DTPM achieves higher carrier suppression compared to single triangular phase modulation.
- DTPM demonstrates improved tolerance to modulation amplitude inaccuracies and temperature variations.
- Experimental RIOG setup using DTPM achieved a bias stability of 0.22 deg/s (10 s integration) for 1 hour.
Conclusions:
- DTPM is an effective method for reducing backscattering noise in RIOGs.
- The achieved bias stability represents a significant advancement in RIOG technology.
- DTPM offers practical advantages for the development of high-performance optical gyroscopes.
