FIBRE OPTIC DEVICES

摘要

A fibre optic device which can be used as an attenuator or a sensor. The fiber has a biconical taper which can be immersed in a medium having a higher refractive index so that light transmission through the fibre can be used as a sensor in measuring temperature, refractive index. When used as a tuneable attenuator electrodes are mounted in contact with the medium so that it can be heated to vary transmissivity through the fibre.