Abstract

Optical fibres made from core and cladding materials with different dispersions are proposed theoretically to get optical fibre devices that have not yet been achieved by conventional fibres [1]. The fibres are called dispersive fibres due to their large wavelength dependence of the index difference. Dispersive fibres arc fabricated from optical glasses whose refractive-index curves interseet [2]. However, it is difficult to make dispersive fibres with various chromatic characteristics because of limited number of optical glasses. In this paper, it is shown that spectral properties of dispersive fibres can be changed greatly by annealing under the proper conditions.

© 1996 IEEE