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Ring resonator in a Sagnac interferometer as a birefringence magnifier
1National Research Council, 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada. ilya.golub@nrc.ca
Optics Letters
|January 15, 2005
Summary
A new technique enhances birefringence measurements using a ring resonator in a Sagnac interferometer. This method significantly improves sensitivity for detecting small polarization changes and optical fiber properties.
Area of Science:
- Optics and Photonics
- Interferometry
- Fiber Optics
Background:
- Sagnac interferometers are sensitive to polarization changes.
- Measurement sensitivity can be limited by optical components.
- Birefringence and polarization mode dispersion are critical parameters in optical systems.
Purpose of the Study:
- To propose and demonstrate a novel birefringence magnification technique.
- To enhance the sensitivity of Sagnac interferometer measurements.
- To reduce the threshold for nonlinear switching and laser mode locking.
Main Methods:
- Utilizing a ring resonator integrated into a Sagnac interferometer.
- Implementing a novel birefringence magnification technique.
- Experimental demonstration and measurement of enhancement factor.
Main Results:
- Achieved an experimental enhancement factor of 38.
- Demonstrated increased measurement sensitivity to small birefringence.
- Showcased improved sensitivity to polarization mode dispersion.
Conclusions:
- The proposed technique effectively magnifies birefringence.
- This method enhances Sagnac interferometer performance for sensitive measurements.
- Applicable for reducing thresholds in nonlinear switching and laser mode locking.
