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UV-induced Bragg grating inscription into single-polarization all-solid hybrid microstructured optical fiber
Ryuichiro Goto1, Ihsan Fsaifes, Assaad Baz
1Institute of Photonics and Optical Science, School of Physics, University of Sydney, New South Wales, Australia. ryugoto@physics.usyd.edu.au
Optics Express
|July 13, 2011
Summary
Researchers created a single-polarization all-solid hybrid optical fiber with a UV-induced Bragg grating. This fiber achieves strong, polarized Bragg reflection with a high extinction ratio, maintaining its unique polarization properties.
Area of Science:
- Photonics
- Materials Science
- Optical Engineering
Background:
- Microstructured optical fibers offer unique light manipulation capabilities.
- Polarization control in optical fibers is crucial for various photonic applications.
- UV-induced Bragg gratings are widely used for wavelength-selective filtering.
Purpose of the Study:
- To demonstrate a novel single-polarization all-solid hybrid microstructured optical fiber.
- To inscribe a UV-induced Bragg grating within the fiber's single-polarization window.
- To achieve high-quality polarized Bragg reflection with a large polarization-extinction ratio.
Main Methods:
- Fabrication of an all-solid hybrid microstructured optical fiber.
- Inscribing a Bragg grating using ultraviolet (UV) light.
- Characterization of the fiber's polarization properties and grating performance.
Main Results:
- Successfully inscribed a strong (∼20 dB) UV-induced Bragg grating.
- Achieved polarized Bragg reflection within the fiber's 30 nm-wide single-polarization window.
- Demonstrated a large polarization-extinction ratio due to sharp band-edge cutoff.
- Hybrid structure minimized UV exposure to high-index regions, preserving the single-polarization window.
Conclusions:
- The developed hybrid microstructured optical fiber effectively supports UV-induced Bragg gratings for polarized light.
- This technology enables high-performance polarized Bragg reflection with excellent extinction ratios.
- The fiber design ensures stability and preservation of single-polarization characteristics.
