Patent Number: 6,166,851

Title: Optical amplifier manufacture

Abstract: A construction of gain tilt exhibiting optical amplifier that incorporates a gain flattening filter also includes a neutral density filter the value of whose attenuation is adjustable after assembly of the components of the amplifier. This neutral density filter is constructed by the performance of a succession of localised re-fusion operations at a localised region of an optical fiber. By this means the attenuation is increased to a desired value that provides the amplifier with optimised gain flattening at some predetermined value of amplifier external gain.

Inventors: Flintham; Barrie (Paignton, GB), Jones; Kevan Peter (Totnes, GB), Andrews; Stephen (Torquay, GB)

Assignee: Nortel Networks Limited

International Classification: H01S 3/067 (20060101); H01S 3/06 (20060101); H01S 003/00 ()

Expiration Date: 12/26/2017