Optical fiber coupling system

Details Optical fiber coupling system Optical fiber coupling system

1997-08-26

1999-05-18

Ngo, Hung N.

Optical waveguides

With optical coupler

Input/output coupler

385 38, 385 33, 385 25, G02B6/32

Patent

active

059058285

ABSTRACT:
An optical fiber coupling system has high insertion loss repeatability. A lens expands the mode size of a source fiber connected to a test instrument or other source, reducing insertion loss sensitivity to positional and angular alignment of the bare input fiber with the source fiber. Index matching fluid reduces the effect of the cleave angle of the input fiber on insertion loss. The optical fiber coupling system is calibrated by substituting a through fiber of similar type and length in place of the input fiber. According to a first preferred embodiment of the present invention, a capillary tube contains the index matching fluid. According to a second preferred embodiment of the present invention, the index matching fluid is contained in a reservoir enabling optical signals to be coupled to optical components having multiple input fibers.

REFERENCES:
patent: 4738527 (1988-04-01), McBrien
patent: 4767430 (1988-08-01), Deneka et al.
patent: 4958900 (1990-09-01), Ortiz, Jr.
patent: 5127725 (1992-07-01), Mueller et al.
patent: 5508802 (1996-04-01), Boehme et al.

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