Light attenuating element and method of producing the same

Details Light attenuating element and method of producing the same Light attenuating element and method of producing the same

1992-05-05

1993-11-30

Bovernick, Rodney B.

Optical waveguides

Accessories

Attenuator

385 66, G02B 638

Patent

active

052673421

ABSTRACT:
A light attenuating element comprising a ferrule and two optical fibers inserted through the ferrule along an optical axis thereof is disclosed. The inner ends of both the optical fibers are cut with a predetermined inclination angle and spaced from each other with a predetermined distance therebetween to obtain a required light attenuation value. A light attenuating element including an alignment sleeve into which two ferrules each having an optical fiber inserted therethrough are fitted with a predetermined distance being maintained between the foremost ends thereof is also disclosed. A method of producing a light attenuating element is practiced by way of the steps of inserting through one ferrule one optical fiber of which one end is optically connected to a light source, inserting through another ferrule another optical fiber of which one end is optically connected to a power meter, measuring a light attenuation value of the light attenuating element by the power meter, stopping the inserting operation when a required light attenuation value is obtained, cutting the optical fibers and then grinding and polishing the outer ends of the optical fibers together with the ferrules. An adaptor type optical attenuator having a light emitting element incorporated therein is disclosed. In addition, an optical connector type optical attenuator is also disclosed.

REFERENCES:
patent: 4717234 (1988-01-01), Barlow et al.
patent: 4893889 (1990-01-01), Iwakiri et al.
patent: 5066094 (1991-11-01), Takahashi

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