Optical waveguide enhanced laser to fiber coupling

Details Optical waveguide enhanced laser to fiber coupling Optical waveguide enhanced laser to fiber coupling

1992-11-17

1993-11-09

Lee, John D.

Optical waveguides

With optical coupler

Input/output coupler

385 28, 385 49, 385 50, G02B 642

Patent

active

052610179

ABSTRACT:
Apparatus for improving the coupling efficiency of a laser to a single mode fiber by means of an intermediate waveguide is disclosed. For uniform waveguides maximum improvement results when waveguide's mode field radii MFR is designed as the geometrical mean of the MFR of the laser and the MFR of the fiber. The apparatus can be extended to multi-stage couplers. Each successive stage is designed to have a spot size which is the geometric mean of the section before and after. With only a small number of stages significant improvement in coupling efficiency can be realized.

REFERENCES:
patent: 3894789 (1975-07-01), Kobayashi et al.
patent: 4199222 (1980-04-01), Ikushima et al.
patent: 4490020 (1984-12-01), Sakaguchi et al.
patent: 4768199 (1988-08-01), Heinen et al.
patent: 4795228 (1989-01-01), Schneider

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