Integrated optical coupler with two inputs and 2N outputs

Details Integrated optical coupler with two inputs and 2N outputs Integrated optical coupler with two inputs and 2N outputs

1994-12-16

1996-07-30

Ngo, John

Optical waveguides

With optical coupler

Particular coupling structure

385 14, 385 50, G02B 626

Patent

active

055420141

ABSTRACT:
The invention comprises (a) a divider (D) by 2 of the optical power received at one input (E.sub.1, E.sub.2) and (b) two groups of single mode waveguides coplanar to the divider and symmetrical relative to the axis of symmetry (Z) of the divider (D), each group being composed of waveguide sections connected in tree and branch fashion by Y junctions (J.sub.ii) between one input junction (J.sub.11, J.sub.12) connected to one of the outputs of the divider and N sections of waveguide difining N outputs (S.sub.1 to S.sub.16) of the coupler parallel to the axis of the divider. According to the invention, each of these input junctions (J.sub.11, J.sub.12) has a rectilinear input branch (B.sub.1) with predetermined length such that the transverse distribution of the optical power at the output of the rectilinear input branch (B.sub.1) is centered to a large degree on the axis of this input branch.

REFERENCES:
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patent: 5222167 (1993-06-01), Jean et al.
patent: 5233453 (1993-08-01), Sivajan et al.
patent: 5297233 (1994-03-01), Lerminiaux
patent: 5311604 (1994-05-01), Rogner et al.
patent: 5394489 (1995-02-01), Koch
Electronic Letters, vol. 28, No. 7, 26 Mar. 1992, Stevenage GB, pp. 644-645.
Applied Optics, vol. 23, No. 17, Sep. 1984 pp. 2991-2998.
Optical Fiber Communication Conf. 1989, Tech. Digest Series, vol. 5, Feb. 1989, p. 90.

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