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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Active polarization coupler for birefringent fiber
Optics Letters
|September 2, 2009
Summary
Researchers achieved dynamic polarization coupling modulation in birefringent fibers using oscillating piezoelectric ceramics. This method enables high-frequency modulation for advanced optical applications.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Static coupling between polarization modes in birefringent fibers was previously demonstrated.
- Periodic stress applied once per beat length enables static polarization mode coupling.
Purpose of the Study:
- To achieve dynamic modulation of polarization coupling in birefringent fibers.
- To explore high-frequency modulation using oscillating stress.
- To investigate polarization modulation within a Mach-Zehnder interferometer setup.
Main Methods:
- Applying oscillating pressure to birefringent fiber using a piezoelectric ceramic.
- Modulating polarization coupling by varying piezoelectric ceramic amplitude (30-50 V peak to peak).
- Implementing stress along a fiber polarization axis within a Mach-Zehnder interferometer.
Main Results:
- Achieved coupling modulation at kilohertz-to-megahertz frequencies.
- Demonstrated modulation of polarization coupling from minimum to maximum.
- Successfully achieved polarization modulation using stress within an interferometer.
Conclusions:
- Dynamic polarization coupling modulation is feasible using oscillating stress.
- Piezoelectric-driven modulation offers high-frequency control over polarization coupling.
- The described methods provide versatile techniques for manipulating light polarization in optical systems.
