Design of a dispersion-engineered broadband Ge11.5As24Se64.5-Si3N4 strip–slot hybrid waveguide with giant and flat dispersion over 350 nm for on-chip photonic networks
| Autor: | Min Yang, Zhanqiang Hui, Abdel-Hamid Soliman, Xiangmei Zeng, Meizhi Zhang, Jiamin Gong |
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| Rok vydání: | 2019 |
| Předmět: |
Coupling
Materials science business.industry Physics::Optics Resonance 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics Slot-waveguide Wavelength Optics law 0103 physical sciences Dispersion (optics) Broadband Electrical and Electronic Engineering Physical and Theoretical Chemistry Photonics 0210 nano-technology business Waveguide |
| Zdroj: | Optics Communications. 451:323-332 |
| ISSN: | 0030-4018 |
| Popis: | We propose a new strip–slot hybrid waveguide with extreme large and flat dispersion over broad wavelength range. The strong resonance coupling between the strip and slot modes has been employed to obtain a high dispersion at desired wavelength. The properties of dispersion are analyzed using the finite-difference time-domain method. All numerical simulation results reveal that for the optimized waveguide structure, a maximum dispersion of − 1 . 54 × 1 0 6 ps nm − 1 km − 1 and dispersion full width at half-maximum of 2.5 nm at 1 . 55 μ m are obtained. By cascading the strip–slot hybrid waveguides with varied width and height, a large and flattened dispersion of − 9 . 8 × 1 0 5 ps nm − 1 km − 1 covering 350 nm is achieved. Moreover, dispersion compensation of 100 Gbit/s return-to-zero on-off-keying optical-time-division-multiplexing signals after 50-km single mode fiber transmission, and after 7-km hollow-core photonic band-gap fiber transmission are demonstrated, separately. Such a waveguide will find widespread applications in on-chip all-optical signal processing. |
| Databáze: | OpenAIRE |
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