Single mode couplers

Details Single mode couplers Single mode couplers

Filed on

1989-07-10

Date issued

1990-08-21

Examiner

Lee, John D.

Other Related Categories

350 9617, G02B 628

Type

Patent

Status

active

Patent number

049500457

Description

ABSTRACT:
A 1.times.N single mode optical waveguide coupler comprises a single input optical fibre (1), a slab-like mixer waveguide (3) and a plurality (N) of output optical fibres (2). As a result of interference effects light introduced into the mixer waveguide (3) via the centrally located input fibre (1) produces a linear array of output spots at various intervals along the length of the mixer waveguide. The length of the mixer waveguide is chosen such that the output optical fibres are aligned with one such array of output spots. The fibres may be adiabatically tapered to a smaller diameter in order to increase their modal spot size.

REFERENCES:
patent: 4213670 (1980-07-01), Milton et al.
patent: 4449783 (1984-05-01), Witte
patent: 4474425 (1984-10-01), Kaede
patent: 4484794 (1984-11-01), Witte
patent: 4590619 (1986-05-01), Winzer
patent: 4591372 (1986-05-01), Bricheno et al.

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