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Efficient Design for Integrated Photonic Waveguides with Agile Dispersion.
Zhaonian Wang1, Jiangbing Du1, Weihong Shen1
1State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China.
Sensors (Basel, Switzerland)
|October 13, 2021
Summary
This study introduces a new method for agile chromatic dispersion (CD) engineering in photonic waveguides using a horizontal double-slot structure. This technique enables precise control over dispersion profiles for advanced photonic integrated circuits.
Area of Science:
- Photonics and Optical Engineering
- Materials Science and Engineering
Background:
- Chromatic dispersion (CD) engineering is crucial for photonic integrated circuits (PICs).
- Applications include on-chip CD compensation, supercontinuum generation, Kerr-comb generation, microresonators, and mode-locked lasers.
- Agile dispersion profiles, such as broadband flat dispersion, are highly desired.
Purpose of the Study:
- To demonstrate a novel method for agile dispersion engineering of integrated photonic waveguides.
- To achieve agile dispersion shapes including broadband low dispersion, constant dispersion, and slope-maintained linear dispersion.
Main Methods:
- Utilized a horizontal double-slot waveguide structure.
- Employed an inverse design method that is objectively-motivated and automation-supported.
- Performed numerical simulations for Kerr frequency comb generation.
Main Results:
- Achieved agile dispersion shapes with dispersion ranging from 0 to 1.5 ps/(nm·km) over an 861-nm bandwidth.
- Demonstrated superior performance for broadband low dispersion.
- Generated a Kerr frequency comb with a 1068-nm bandwidth and a 20-dB power variation.
Conclusions:
- The proposed method offers agile dispersion engineering capabilities for integrated photonic waveguides.
- The achieved broadband low dispersion performance is notable.
- Significant potential for integrated photonic design automation is expected.
