Optical attenuator

Details Optical attenuator Optical attenuator

1998-01-22

2000-08-01

Arroyo, Teresa M.

Optical waveguides

Accessories

Attenuator

385142, G02B 600

Patent

active

060978740

ABSTRACT:
An optical attenuator is provided with a metal-doped optical fiber having a core doped with a transition metal that absorbs light, and a connector that connects this metal-doped optical fiber to an outside transmission line. The core is doped with a transition metal so as to have a uniform rate of attenuation per unit of length. The amount of attenuation may thus be controlled by setting the length of the optical fiber containing this core. The construction adopted for the connector may be fused splicing, mechanical splicing, or optical connection. A transition metal is doped in the core at a uniform concentration. This optical attenuator may also be provided with an exchange section for switching among a plurality of metal-doped optical fibers having mutually differing lengths. Only one type of metal-doped fiber need be produced, and the fiber is used by varying its length.

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