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Ultracompact low-loss coupler between strip and slot waveguides
Zhechao Wang1, Ning Zhu, Yongbo Tang
1JORCEP [Joint Research Center of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang University], Zhejiang University, Hangzhou 310058, China. Zhechao@kth.se
Optics Letters
|May 19, 2009
Summary
We developed a compact waveguide coupler for efficient light transfer between strip and slot waveguides. This device achieves 97% coupling efficiency with high tolerance to errors and wavelength insensitivity.
Area of Science:
- Photonics
- Optical Engineering
- Nanotechnology
Background:
- Waveguide couplers are essential components in integrated photonic circuits.
- Efficient light transfer between different waveguide types is crucial for device performance.
Purpose of the Study:
- To design and experimentally validate an ultracompact waveguide coupler.
- To achieve high-efficiency, low-loss light coupling between strip and slot waveguides.
Main Methods:
- Theoretical modeling and simulation of waveguide coupler designs.
- Experimental fabrication and characterization of the optimized coupler.
- Analysis of geometrical parameters for performance optimization.
Main Results:
- Achieved a coupling efficiency of 97% experimentally.
- The coupler's overall size is below 10 micrometers.
- Demonstrated high tolerance to fabrication errors and wavelength insensitivity.
Conclusions:
- The proposed ultracompact waveguide coupler offers highly efficient and robust light transfer.
- This technology is suitable for advanced integrated photonic applications.
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