Shasha Liao, Cong Huang, Yuting Feng, Wuhao Zhang, Shuai Zhao, Zhenwei Liu. Ultra-High-Bandwidth Silicon-Based Photonic Filter for Coarse Wavelength Division Multiplexing Systems[J]. Acta Optica Sinica, 2023, 43(5): 0513002
- Acta Optica Sinica
- Vol. 43, Issue 5, 0513002 (2023)
Fig. 1. Schematic of grating assisted contra-directional couplers. (a) Traditional grating; (b) SWG; (c) narrow waveguide
Fig. 2. Parameter comparison of different waveguide structures. (a) Effective refractive index varies with the wavelength; (b) electric field intensity distribution varies with the width of the waveguide
Fig. 3. Output spectra of the through and drop ports of broad bandwidth filter based on the narrow waveguide
Fig. 4. Schematic of different apodization
Fig. 5. Schematic of broad bandwidth filter after apodization
Fig. 6. Transmission spectra of the apodized and the uniform ultra-wide bandwidth filter
Fig. 7. Transmission spectra of the compact, high sidelobe rejection ratio, and broad bandwidth filter
Fig. 8. Spectra of the filter varied with Gaussian coefficients α1, α2, and G. (a) Spectra on drop port under different Gaussian coefficients α1 and α2; (b) spectra on drop port by controling G
Fig. 9. Output spectra of the drop port varied with Wg1 and Wg2
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Table 1. Structural parameters of ultra-wide bandwidth filter
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Table 2. Structural parameters of the compact, high sidelobe rejection ratio, and broad bandwidth filter
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Table 3. Comparison of the performances of different broad bandwidth filter schemes
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