Group velocity equalisation in multimode waveguides using inverse scattering designs

6th International Conference on Optical, Optoelectronic and Photonic Materials and Applications 2014

May, A.R.^1 ; Zervas, M.N.^1

Optoelectronics Research Centre, University of Southampton, SO17 2BJ, United Kingdom^1

关键词: Control groups;    Differential group delay;    Effective index;    Group velocities;    Guided modes;    Inverse scattering;    Multi-mode waveguides;    Refractive index profiles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/619/1/012041/pdf
DOI  :  10.1088/1742-6596/619/1/012041

来源: IOP

【 摘 要 】

In this paper, using an inverse scattering approach, we describe how the selection of mode effective indices and thus phase velocities can be used to control group velocity in a waveguide. As such it is shown that differential group delay can be equalised or minimised over a wavelength of choice. A particular feature of the new designs is the development of rings and a peaked core which may split depending upon the number of guided modes. These designs show characteristics comparable with commercially available fibres but with refractive index profiles that differ from typical graded-index designs.