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Highly birefringent polymer side-hole fiber for hydrostatic pressure sensing
Optics Letters
|July 1, 2015
Summary
Researchers developed a novel birefringent polymer optical fiber with an elliptical core. Narrowing the fiber’s bridge structure significantly boosts birefringence and pressure sensitivity for advanced sensor applications.
Area of Science:
- Materials Science
- Optical Engineering
- Polymer Science
Background:
- Birefringent polymer optical fibers are crucial for sensing applications.
- Controlling fiber geometry is key to enhancing optical properties.
Purpose of the Study:
- To fabricate and characterize a novel birefringent side-hole polymer optical fiber.
- To investigate the impact of bridge thickness on fiber birefringence and pressure sensitivity.
Main Methods:
- Fabrication of polymer optical fibers using PMMA/PS copolymer and PMMA cladding.
- Experimental characterization of optical properties, including birefringence and polarimetric sensitivity.
- Numerical simulations to validate experimental findings.
Main Results:
- Demonstrated simultaneous increase in birefringence and polarimetric sensitivity with reduced bridge thickness.
- Achieved record-high polarimetric sensitivity (175-140 rad/MPa/m) in a 5 μm bridge fiber.
- Observed high phase modal birefringence (>3×10⁻⁵ at 600 nm) leading to low crosstalk.
Conclusions:
- Narrowing the bridge in side-hole polymer optical fibers is an effective strategy to enhance performance.
- The developed fiber exhibits potential for high-performance hydrostatic pressure sensing.
- The study provides valuable insights for designing advanced polymer optical fiber sensors.
