Microbending Losses In Optical Fibers With Different Cross-Sections

We fabricated three silica glass preforms with different cross-sections, which were used to draw optical fibers. A classic preform had a circular shape and was prepared on the MCVD machine, second preform with a circular outer shape and hexagonal core was fabricated by the hybrid method, last preform with hexagonal core and outer shape and was fabricated by stacking method. Each preform were used to draw series of fibers with parameters corresponding to the geometry of typical telecommunication fibers. In following part of our experiment all fibers were used in microbending tests.