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Optically compensated polarization reciprocity in interferometric fiber-optic gyroscopes
Optics Express
|March 26, 2014
Summary
Optical compensation eliminates polarization nonreciprocity (PN) in interferometric fiber optic gyroscopes (IFOGs). This allows both ports of the coil coupler to be used for rotation sensing, simplifying IFOG design.
Area of Science:
- Optics
- Photonics
- Sensor Technology
Background:
- Conventional interferometric fiber optic gyroscopes (IFOGs) have a nonreciprocal port that is unusable due to polarization nonreciprocity (PN).
- This limitation in minimal scheme IFOGs restricts their sensing capabilities and increases complexity.
Purpose of the Study:
- To theoretically and experimentally investigate polarization reciprocity in an optically compensated IFOG.
- To demonstrate the elimination of PN errors at the nonreciprocal port through optical compensation.
Main Methods:
- Theoretical analysis of polarization nonreciprocity in IFOG configurations.
- Experimental validation using an optically compensated IFOG setup.
Main Results:
- Optical compensation effectively eliminates polarization nonreciprocity (PN) at the nonreciprocal port.
- The optically compensated IFOG exhibits two low-PN ports suitable for rotation sensing.
- This enables the potential for simplified, single-port IFOG designs.
Conclusions:
- Optical compensation is a viable strategy to overcome PN limitations in IFOGs.
- The development of IFOGs with two usable low-PN ports is achieved.
- This research paves the way for more structurally complex and efficient IFOGs.
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