1：Experimental Design and Method Selection:

The study involved numerical simulations using the finite element method in COMSOL Multiphysics software to design fiber structures with intentional birefringence and all-normal dispersion. Two types of birefringence introduction were investigated: 'bow-tie' stress rods and elliptical deformation. The stack-and-draw technique was used for fiber fabrication.

2：Sample Selection and Data Sources:

Test fibers were fabricated using Schott SF6 and F2 glasses, with a modified F2/05 glass for stress rods. Fibers were characterized for dispersion and birefringence.

3：List of Experimental Equipment and Materials:

Equipment included a scanning electron microscope (SEM) for imaging, a Mach-Zehnder interferometer for dispersion measurement, a setup with polarizers and analyzers for birefringence measurement, a supercontinuum light source (Leukos SM-30-450), optical spectrum analyzer (Yokogawa AQ6375), lenses, beam splitters, and cameras. Materials included Schott SF6, F2, and F2/05 glasses.

4：Experimental Procedures and Operational Workflow:

Fibers were fabricated and imaged with SEM. Dispersion was measured using an unbalanced Mach-Zehnder interferometer, exciting one polarization axis at a time. Birefringence was measured using a crossed polarizer method, recording interference fringes. Numerical simulations were performed to compare with experimental results.

5：Data Analysis Methods:

Dispersion data were fitted with a 5th order polynomial to calculate chromatic dispersion. Birefringence was calculated from interference fringe distances. Numerical simulations included stress-induced refractive index changes and mode properties.