Characterization of photonic crystal fibers: Selected methods and experience

Abstract

Several techniques for characterization of photonic crystal fibers (PCFs) are reviewed, focusing on measurements of attenuation, optical uniformity, selected polarization parameters, and effects of temperature and mechanical strain applied to the fiber. PCF properties often radically differ from those of conventional fibers used in communications networks, and available lengths are generally short, therefore different approach to characterization is required. Comparisons of alternative methods for selected tests are made, and examples of errors in PCF handling and testing are discussed. Examples of results obtained for silica single-mode PCFs with GeO2-doped core are also presented, accompanied by geometrical and compositional fiber data.