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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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High-Order Interference Effect Introduced by Polarization Mode Coupling in Polarization--Maintaining Fiber and Its
Chuang Li1,2, Jun Yang3,4, Zhangjun Yu5,6
1Key Laboratory of In-Fiber Integrated Optics, Ministry of Education, Harbin Engineering University, Harbin 150001, China. lichuang@hrbeu.edu.cn.
Sensors (Basel, Switzerland)
|March 25, 2016
Summary
High-order interference (HOI) in polarization-maintaining fibers (PMF) can lead to errors. An optical path tracking (OPT) method simplifies HOI analysis, enabling accurate identification of coupling points using just four measurements.
Area of Science:
- Optical Engineering
- Fiber Optics
- Interferometry
Background:
- Polarization mode couplings (PMC) in polarization-maintaining fibers (PMF) can generate high-order interference (HOI).
- HOI in white light interferometry (WLI) can cause misjudgment of realistic coupling points in PMFs.
- Accurate characterization of PMFs is crucial for reliable optical communication systems.
Purpose of the Study:
- To present an optical path tracking (OPT) method for simplifying the analysis of HOI in PMFs.
- To demonstrate conditions for enhancing and suppressing HOIs.
- To propose a strategy for readily identifying HOI by altering polarizer splice angles.
Main Methods:
- Development of an optical path tracking (OPT) method.
- Demonstration of HOI enhancement and suppression conditions.
- A strategy involving altering splice angles between polarizers and PMF for HOI identification.
- PMF experiment with two perturbation points.
Main Results:
- The proposed OPT method simplifies HOI analysis.
- Characteristic interferograms, including HOIs, can be distinguished within four measurements.
- The method allows for the estimation of realistic coupling points in PMFs.
- Distinguishing HOIs from actual coupling points is achieved.
Conclusions:
- The OPT method effectively simplifies HOI analysis in PMF characterization.
- The proposed strategy enables reliable identification of HOI, leading to accurate coupling point estimation.
- This technique improves the precision of PMF testing using WLI.
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