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Updated: Jun 16, 2026
08:48
Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
New design and analysis of Bragg grating waveguides
Kensuke Ogawa1, Ning Guan, Kazuhiro Goi
1Optics and Electronics Laboratory, Fujikura Ltd., 1440, Mutsuzaki, Sakura, Chiba 285-8550, Japan. kenogawa@lab.fujikura.co.jp
Optics Express
|February 23, 2010
Summary
This study introduces a novel optical waveguide design for creating Bragg gratings without birefringence. The new design enables precise control over effective refractive index profiles, leading to non-birefringent Bragg grating waveguides for applications like dispersion compensation.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
Background:
- Birefringence in optical waveguides can degrade signal quality.
- Designing Bragg gratings with specific refractive index profiles is challenging.
Purpose of the Study:
- To present a new optical waveguide design for synthesizing non-birefringent Bragg gratings.
- To enable precise control over effective refractive index profiles in Bragg gratings.
- To apply the design for chromatic dispersion compensators.
Main Methods:
- A novel waveguide core design featuring a top surface trench with modulated width.
- Utilizing a differential inverse scattering algorithm to obtain effective refractive index profiles.
- Converting refractive index profiles to waveguide width profiles based on the new design.
Main Results:
- Successfully designed non-birefringent Bragg grating waveguides on a planar substrate.
- Demonstrated the application of the design for chromatic dispersion compensators.
- Presented a characterization method using short-time Fourier transform analysis.
Conclusions:
- The proposed waveguide design effectively eliminates birefringence in Bragg gratings.
- This method offers a viable approach for creating advanced optical components like dispersion compensators.
- The short-time Fourier transform provides effective characterization of Bragg grating waveguides.
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