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Broadband single-polarization optical fiber based on surface plasmon resonance
Applied Optics
|April 1, 2020
Summary
Researchers developed a novel broadband single-polarization optical fiber using surface plasmon resonance (SPR). This new fiber achieves a high extinction ratio, enabling high-quality fiber-integrated polarizers for telecommunications.
Area of Science:
- Photonics
- Materials Science
- Optical Engineering
Background:
- Surface plasmon resonance (SPR) offers unique light-matter interaction properties.
- Developing high-performance optical polarizers is crucial for telecommunications and sensing.
Purpose of the Study:
- To propose and demonstrate a new broadband single-polarization optical fiber.
- To achieve a high extinction ratio and low insertion loss using SPR.
Main Methods:
- Designing a double-hole optical fiber with a Ge-doped core.
- Integrating conductive and dielectric layers to excite SPR.
- Analyzing the coupling between guided modes and surface plasmon modes.
Main Results:
- Achieved an extinction ratio exceeding 25 dB over a wide telecom band (1.17-1.42 µm).
- Demonstrated low insertion loss of less than 0.25 dB.
- Confirmed efficient transmission of TE polarization with significant loss for TM polarization.
Conclusions:
- The proposed SPR-based optical fiber exhibits excellent polarization-selective properties.
- This technology holds significant promise for high-quality fiber-integrated polarizers.
- The design offers a viable solution for broadband polarization control in optical systems.
