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Stress-induced birefringence control in optical planar waveguides
Xiuli Zhao1, Chunfei Li, Y Z Xu
1Department of Physics, Harbin Institute of Technology, Harbin 15001, China. xiulizhao@sina.com
Optics Letters
|April 17, 2003
Summary
Researchers derived the first analytical thermal-stress formula for optical planar waveguides. This formula helps manage stress and stress-induced birefringence through smart waveguide design, impacting material science and photonics.
Area of Science:
- Optoelectronics
- Materials Science
- Solid Mechanics
Background:
- Optical planar waveguides are crucial in photonics.
- Thermal stress can induce birefringence, affecting device performance.
- Existing methods for stress analysis in waveguides are limited.
Purpose of the Study:
- To derive an analytical formula for thermal stress in the core layer of optical planar waveguides.
- To provide a tool for understanding and mitigating stress-induced birefringence.
Main Methods:
- Utilized the thin-film approximation.
- Employed a closed-form solution for multilayered isotropic structures.
- Developed an analytical thermal-stress formula.
Main Results:
- The derived formula analytically describes thermal stress in the waveguide core.
- Identified elastic, thermal, and structural parameters influencing stress magnitude.
- Demonstrated the potential to remove thermal stress and birefringence via waveguide design.
Conclusions:
- The novel analytical formula offers a pathway to control thermal stress in optical waveguides.
- Proper waveguide design can eliminate stress-induced birefringence.
- This work advances the design and fabrication of photonic devices.