Optical amplifier manufacture

Details Optical amplifier manufacture Optical amplifier manufacture

1998-12-29

2000-12-26

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

H01S 300

Patent

active

061668516

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.

REFERENCES:
patent: 5708740 (1998-01-01), Cullen
patent: 5959766 (1999-09-01), Otterbach et al.
patent: 5963361 (1999-10-01), Taylor et al.
Hashimoto et al, Variable Optical Fiber Attenuators, IEEE, pp. 1151-1152, 1999.

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