A scheme for optical circulator by using asymmetric Y-branch waveguide structures
Citation
Xionggui Tang, Yaxin Wang, Ming Chen, and Shan Liang, (2017). A scheme for optical circulator by using asymmetric Y-branch waveguide structures. Optics Communications, 393, 56-61. http://dx.doi.org/10.1016/j.optcom.2017.01.026
Keywords
- Optical circulator
- Asymmetric Y-branch waveguide structure
- Photonic integrated systems
- Optical unidirectional propagation
- Beam propagation method (BPM)
- High optical extinction ratio
- Low optical loss (optical excess loss)
- Weak dependence of wavelength
- Weak polarization dependence (TE and TM modes)
- Large fabrication tolerance
- Polymer materials
- Waveguide structure
- Integrated optical devices
- Nonreciprocity (without using)
- Magneto-optical effect
- Opto-mechanical interaction
- Stimulated Brillouin scattering
- Taper waveguide
- Bend waveguide
- Straight waveguide
- Branch angle
Brief
This article proposes and numerically investigates a novel optical circulator scheme utilizing asymmetric Y-branch waveguide structures to achieve unidirectional light propagation with high performance and fabrication tolerance.
Summary
This paper introduces a new, compact optical circulator design for photonic integrated systems that uses asymmetric Y-branch waveguide structures to achieve unidirectional light flow without magneto-optical effects or other nonreciprocal methods. Numerical simulations demonstrate that this design achieves high extinction ratio (over 29.9 dB), low optical loss (less than 0.1 dB), weak dependence on wavelength and polarization, and offers simple structure and large fabrication tolerance. This novel approach provides a new way to implement optical circulators in integrated circuits.
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