Coupling system for output light of semiconductor laser

Details Coupling system for output light of semiconductor laser Coupling system for output light of semiconductor laser

1981-05-27

1984-12-25

Sikes, William L.

G02B 5172

Patent

active

044900201

ABSTRACT:
A coupling system for the output light of a semiconductor laser, characterized in that an end portion of an optical fiber is made as a focusing lens to be coupled with the output light from an active layer of the semiconductor laser is formed so that, at least in a plane parallel to the optical axis of the output light and perpendicular to the junction plane of the semiconductor laser, the width of the end portion continuously decreases towards its tip to provide a required curvature at the tip and that the distribution of light of the semiconductor laser and that of the optical fiber and the focusing lens are matched with each other in the plane perpendicular to the junction plane of the semiconductor laser. The end portion of the optical fiber defining the focusing lens may be formed to have a fixed width in a plane parallel to the junction plane of the semiconductor laser. The end portion of the optical fiber or focusing lens may be formed so that it has a required curvature in a plane parallel to the plane of junction of the semiconductor laser and that the distribution of light of the semiconductor laser and that of the optical fiber and focusing lens are matched with each other also in a plane parallel to the junction plane of the semiconductor laser.

REFERENCES:
patent: 3897135 (1975-07-01), Dyott
patent: 4108622 (1978-08-01), Martin
patent: 4143940 (1979-03-01), Khoe
patent: 4270134 (1981-05-01), Takeda et al.
patent: 4327963 (1982-05-01), Khoe et al.
patent: 4370021 (1983-01-01), Khoe et al.
Kuwahara et al., Sixth European Conference on Optical Communication, Sep. 16-19, 1980, University of York, U.K., "Efficient and Reflection Insensitive Coupling . . . ", pp. 191-194.
Dakss, Laser Focus, Dec. 1975, "Coupling Light Sources to Fibers", pp. 31-34.
Kuwahara et al., Proceedings of the IEEE, vol. 67, No. 10, Oct. 1979, "Efficient Light Coupling from Semiconductor Lasers . . . ", pp. 1456-1457.

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