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

OPTICS COMMUNICATIONS

卷:451

Article

Hui, Zhanqiang¹  Yang, Min¹  Zhang, Meizhi¹  Zeng, Xiangmei¹  Gong, Jiamin¹  Soliman, Abdel-Hamid² 

[1] Xian Univ Posts & Telecommun, Sch Elect Engn, Xian 710121, Shaanxi, Peoples R China

[2] Staffordshire Univ, Stoke On Trent ST4 2DE, Staffs, England

关键词: Optical fiber communication;    Slot waveguide;    Dispersion compensation;    Dispersion-engineered;   

DOI  :  10.1016/j.optcom.2019.06.072

来源: Elsevier

【 摘 要 】

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 -1.54x10(6) ps nm(-1) km(-1) and dispersion full width at half-maximum of 2.5 nm at 1.55 mu m are obtained. By cascading the strip-slot hybrid waveguides with varied width and height, a large and flattened dispersion of -9.8x10(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.

【 授权许可】

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