OPTICAL FIBRE WITH ANGLED CORE

摘要

An optical fibre is heated and twisted so that the resulting optical fibre has a core that inclines at an angle with the longitudinal axis. The angled core (12) may be located at an end-facet (18) of the optical fibre and used to control the feedback of light reflected from that end-facet. In this way, the angled core may be used to suppress feedback for applications such as superluminescent sources or fibre amplifiers, or may be used to control the feedback for applications such as optical fibre lasers. Alternatively, the angled core may be used to attenuate certain modes propagating within the core.