Method and apparatus for coupling at least two optical fibers by

Details Method and apparatus for coupling at least two optical fibers by Method and apparatus for coupling at least two optical fibers by

1981-03-30

1984-02-21

Moore, David K.

350 9620, G02B 514

Patent

active

044326009

ABSTRACT:
The present invention relates to a process of coupling optical fibers by means of a holographic lens, and an apparatus for carrying out this process. A holographic lens H.sub.2 is recorded conventionally by utilization of a provisional hologram H.sub.1, by means of two monomodal optical fibers mounted by their respective end pieces in a block used to support the holographic lens. The block has bores, clearly defined in shape and position, into which are introduced the end pieces of monomodal fibers to effect recording of the holographic lens, and in which are fixed the end pieces of multimodal fibers which are to be optically coupled after withdrawal of the monomodal fibers. The process and apparatus of the invention enables the speckling phenomenon, i.e., that of non-uniform distribution of light in the transmitted beams, to be suppressed, improving the efficiency of the holographic lens.

REFERENCES:
patent: 3666345 (1972-05-01), Maslowski
patent: 4057319 (1977-11-01), Ash et al.
patent: 4310216 (1982-01-01), Pellaux

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