Optical-fiber coupler and manufacturing process therefor

Details Optical-fiber coupler and manufacturing process therefor Optical-fiber coupler and manufacturing process therefor

1997-07-15

1998-12-08

Palmer, Phan T.

Optical waveguides

With optical coupler

Particular coupling structure

385 42, G02B 626

Patent

active

058482083

ABSTRACT:
In an optical-fiber coupler formed by disposing two single-mode optical fibers 1 and 2 in parallel, and fusing and elongating the optical fibers at one position in the longitudinal extent of the optical fibers 1 and 2, variation of insertion loss dependent on the polarization can be eliminated in its manufacturing by imparting a twist to the optical coupling part 3' of the fused-elongated portion 3 so that with respect to the direction of a line on a plane orthogonally intersecting the longitudinal direction of the optical fibers 1 and 2, the line linking the centers of the two optical fibers 1 and 2, the direction of the line on a plane at one end of the optical coupling part 3' of the fused-elongated portion 3 makes an angle of 90 degrees with the direction of the line on a plane at the other end of the optical coupling part 3'.

REFERENCES:
patent: 4291940 (1981-09-01), Kawasaki et al.
patent: 4400055 (1983-08-01), Ozeki et al.
patent: 5195151 (1993-03-01), Campbell, Jr. et al.

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