Optical attenuator, optical photometer and method for controlling quantity of light
OwnerYoshinori Satohinventor
Life of this patent
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Abstract
An optical attenuator realizable at a lower cost, for easily attenuating a quantity of light transmitted through an optical fiber, an optical photometer using the optical attenuator and a method for controlling a quantity of light by the optical attenuator. The optical attenuator (10, 11) comprises: two ferrules (41, 42) provided so that top surfaces thereof are stood opposite to each other, in which an optical fiber (31, 32) is connected to a base edge portion on each of the ferrules and either or both of the ferrules can be moved along an optical axis of each ferrule; and a split sleeve (2) for holding the ferrules in the same axis line (X, Y).
Claims6
An optical attenuator comprising:
- two ferrules provided so that top surfaces thereof are stood opposite to each other, in which an optical fiber is connected to a base edge portion on each of the ferrules and either or both of the ferrules can be moved along an optical axis of each ferrule;
- and
- a split sleeve for holding the ferrules in the same axis line.
An optical photometer comprising:
- an optical coupler for distributing a light inputted from an outside to a plurality of coupler output optical fibers, to output a distributed light to each of the coupler output optical fibers;
- a plurality of optical attenuators connected to the optical coupler through the coupler output optical fibers respectively, in which each of the optical attenuators attenuates the distributed light by a predetermined return loss, to output an attenuated light to each of a plurality of attenuation output optical fibers;
- and
- a plurality of detection members connected to the optical attenuators through the attenuation output optical fibers respectively, in which each of the detection members detects a quantity of the attenuated light;
- wherein each of the optical attenuators comprises:
- two ferrules provided so that top surfaces thereof are stood opposite to each other, in which an optical fiber is connected to a base edge portion on each of the ferrules and either or both of the ferrules can be moved along an optical axis of each ferrule;
- and a split sleeve for holding the ferrules in the same axis line.
A method for controlling a quantity of light, by an optical attenuator, the optical attenuator comprising:
- two ferrules provided so that top surfaces thereof are stood opposite to each other, in which an optical fiber is connected to a base edge portion on each of the ferrules;
- and a split sleeve for holding the ferrules in the same axis line;
- wherein the method comprises the step of moving either or both of the ferrules along an optical axis of each ferrule.
Dependencies are inferred from the claim text.