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On-chip optical mode conversion based on dynamic grating in photonic-phononic hybrid waveguide
Guodong Chen1, Ruiwen Zhang1, Junqiang Sun1
1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.
Scientific Reports
|May 22, 2015
Summary
We demonstrate a novel method for on-chip optical mode conversion using dynamic gratings in hybrid waveguides. This technique offers tunable and reversible control over light propagation, enabling versatile photonic applications.
Area of Science:
- Photonics
- Acousto-optics
- Waveguide technology
Background:
- On-chip optical mode conversion is crucial for integrated photonic circuits.
- Existing methods often lack tunability or reversibility.
- Hybrid photonic-phononic systems offer unique light-sound interactions.
Purpose of the Study:
- To present a scheme for reversible and tunable on-chip optical mode conversion.
- To explore the use of dynamic gratings in hybrid photonic-phononic waveguides.
- To develop a theoretical model for acousto-optic mode conversion.
Main Methods:
- Utilizing the acousto-optic effect to create a dynamic grating.
- Developing a theoretical model considering geometrical deformation and refractive index changes.
- Employing a hybrid photonic-phononic waveguide structure.
Main Results:
- Achieved three types of optical mode conversions with a single waveguide structure.
- Demonstrated tunability by altering the acoustic frequency.
- Showed that complete mode conversion is possible with appropriate acoustic power and waveguide length.
Conclusions:
- The proposed scheme enables efficient, reversible, and tunable on-chip optical mode conversion.
- The hybrid photonic-phononic approach offers a versatile platform for integrated photonics.
- This technology has potential applications in optical signal processing and communication.
