Active optical device

摘要

An optical component comprises a coil 13 of optical fibre having heating means comprising a heating element 14 located substantially within the coil. The heating element is annular and has similar dimensions to the coil. All radiating surfaces of the element are employed to heat the fibre to an elevated temperature. Control circuitry is provided to ensure that the fibre remains at an optimum temperature. Insulating material 15 holds the coil and heater arranged together and prevents relative movement. This arrangement is especially suitable for incorporation in an optical amplifier.