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Quantum-limited fiber-optic phase tracking beyond �� range
Optics Express
|February 9, 2019
Summary
This study presents a fiber-based phase tracking system using adaptive homodyne detection. The novel system achieves a significantly wider tracking range and quantum-limited performance for high-precision fiber sensing applications.
Area of Science:
- Optics and Photonics
- Quantum Metrology
- Fiber Optic Sensing
Background:
- Accurate phase tracking is crucial for advanced fiber optic sensing.
- Existing systems often have limited tracking ranges and performance.
Purpose of the Study:
- To demonstrate a novel fiber-based phase tracking system.
- To achieve quantum-limited performance and a broad tracking range.
Main Methods:
- Experimental demonstration of a fiber-based system.
- Utilizing adaptive homodyne detection.
- Employing an improved phase-locked loop.
Main Results:
- Successful tracking of random phase signals within -2.4 to +2.4 radians.
- Achieved a significantly larger tracking range compared to previous methods.
- Demonstrated quantum-limited performance at a photon flux of approximately 10^6.
Conclusions:
- The developed system offers superior phase tracking capabilities.
- Potential applications include high-precision, real-time sensing of temperature and strain.
- The adaptive homodyne detection technique enhances system performance.
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