Investigation of Group Birefringence of Polarisation Maintaining Highly Birefringent Optical Fiber

Abstract

In the paper there are presented results of an investigation of a group birefringence of a fabricated polarization maintaining highly birefringent optical fiber around the central wavelength 1550 nm. The value of group birefringence was determined in two experimental ways. The first experimental set-up uses a system based on fiber loop mirror and the second one is based on a standard polariscopelike geometry usually used for investigation of birefringence of any optically transparent anisotropic medium. In both cases the birefringence is determined by appropriate analysis of typical interference patterns measured by the particular setup. The measurement was performed for fiber samples with various lengths. Comparison between values obtained for various lengths of samples and resulting from interference patterns measured using different experimental set-ups shows a very good match.

Determination of group and phase birefringence dispersion of Hi-Bi optical fiber using a broadband light source

“…( 6) amended with the wavelength-dependent term B c (). Values of the birefringences correspond very well with those obtained in our previous work for different fiber lengths 14 .…”

“…Therefore, in the paper, we focus on investigation leading to the determination of the group and phase birefringence of the fabricated Hi-Bi fiber. Recently, we have investigated group birefringence of the Hi-Bi fiber in the rather narrow wavelength range around 1550 nm using several approaches 14 . Since the results showed the appropriateness of the investigation and evaluation methods, we decided to determine the group birefringence in a wider wavelength range and extend our investigations also to the phase birefringence in such a wide range of wavelengths.…”