研究目的
Investigating the dispersion management in hybrid optical fibers to achieve flat and all-normal dispersion characteristics over a wide spectral range.
研究成果
The proposed hybrid fiber design allows arbitrary shaping of fiber dispersion while maintaining low confinement losses typical for step-index fibers. The proof of concept fiber demonstrates all-normal dispersion characteristics in a wide wavelength range and ultra-flat dispersion in a narrower range, making it suitable for nonlinear applications.
研究不足
The study is based on numerical simulations and does not include experimental validation. The fabrication of fibers with lower Ge doping level is more trouble-free due to different thermal expansion coefficients between silica glass and highly doped silica glass.
1：Experimental Design and Method Selection
The study uses numerical investigations based on full-vectorial finite difference eigenmode method (Mode Solution software from Lumerical) to solve Maxwell’s equations on a cross-sectional, non-uniform mesh.
2：Sample Selection and Data Sources
The fiber under study is composed of pure and Ge-doped fused silica glass. Materials refractive index values with respect to the dopant concentration and illumination wavelength are calculated based on the model introduced by Fleming et al.
3：List of Experimental Equipment and Materials
Mode Solution software from Lumerical for numerical simulations.
4：Experimental Procedures and Operational Workflow
The methodology involves modifying the structure by introducing high refractive index rings which are further transformed into a series of individual microinclusions distributed in the fiber cladding to shape the fiber’s dispersion profile arbitrarily.
5：Data Analysis Methods
Calculations of effective mode areas take into account all three components of the mode electric fields. The relation between the fiber dispersion and the amount of Ge atoms is analyzed.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
