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Scattering from nonuniform tilted fiber gratings
Yufeng Li1, Stephan Wielandy, Gary E Carver
1Department of Electrical and Computer Engineering and the Institute of Optics, University of Rochester, Rochester, New York 14627, USA. yuli@ece.rochester.edu
Optics Letters
|July 6, 2004
Summary
Scattering from fiber gratings with nonuniformities can be analyzed by decoupling cross-sectional and longitudinal variations. This research details how asymmetry impacts scattering patterns and angular spread, crucial for grating design.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Intracore fiber gratings are essential optical components.
- Nonuniformities in gratings can significantly alter their scattering properties.
- Understanding scattering mechanisms is key to improving grating performance.
Purpose of the Study:
- To analyze scattering from intracore fiber gratings with various nonuniformities.
- To investigate the decoupling of cross-sectional and longitudinal variations.
- To correlate grating imperfections with scattering characteristics.
Main Methods:
- Volume current analysis was employed to model scattering.
- Simulations considered cross-sectional asymmetry and longitudinal variations.
- Results were compared with experimental data from UV-induced gratings.
Main Results:
- Cross-sectional asymmetry was found to influence the azimuthal scattering pattern.
- Longitudinal variations were shown to affect the angular spread of scattered light.
- The angular spread is dependent on the Fourier transform of grating profiles.
Conclusions:
- Cross-sectional and longitudinal variations in fiber gratings can be treated independently.
- The study provides a framework for understanding and predicting scattering from imperfect gratings.
- Findings can guide the fabrication of advanced fiber gratings with controlled scattering.