Optical waveguides – With optical coupler – Particular coupling structure
Patent
1994-02-23
1995-05-30
Lee, John D.
Optical waveguides
With optical coupler
Particular coupling structure
385 51, G02B 626
Patent
active
054209501
ABSTRACT:
A wide wavelength range-coupler whose light-branching ratio shows low wavelength-dependency, which is provided with a well-shaped light-coupling portion and excellent optical properties and which can easily be connected to other optical fibers as well as a method for the production thereof are herein provided. The light-coupling portion 3 of the optical fiber coupler is formed by fusing and orientating a plurality of single mode optical fibers 1 and 2 partially arranged parallel to one another and these optical fibers 1 and 2 have cores 1a and 2a which are different from one another in diameter, but are substantially identical in the outer diameter of the clad and in the mode field diameter. Each single mode optical fiber as a material for the coupler has a core diameter and a mode field diameter which are correlated through a quadratic function and therefore, there can be selected two optical fibers 1 and 2 which are identical to one another in the mode field diameter, but differ in the core diameter.
REFERENCES:
patent: 5011251 (1991-04-01), Miller et al.
patent: 5066087 (1991-11-01), Yamauchi et al.
patent: 5129020 (1992-07-01), Shigematsu et al.
patent: 5295211 (1994-03-01), Weidman
Koya Kazuo
Mori Tsuneo
Lee John D.
Shin-Etsu Chemical Co. , Ltd.
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