Spherical planoconvex lens for optically coupling a semiconducto

Details Spherical planoconvex lens for optically coupling a semiconducto Spherical planoconvex lens for optically coupling a semiconducto

1988-10-24

1989-05-16

Sikes, William L.

350 9615, 350 9617, 350416, G02B 632, G02B 300

Patent

active

048304549

ABSTRACT:
A spherical planoconvex lens for optically coupling a semiconductor laser to an optical waveguide characterized by a thickness of the lens from a planar surface to a vertex of the spherical convex lens surface being greater than the radius of the spherical convex surface but small enough that a focal point of the lens on a laser side lies outside of the lens at a small distance from the planar lens surface. The lens can be formed of either silicon or germanium and has a higher coupling efficiency than is achieved with previously known hemispherical planoconvex lenses of silicon.

REFERENCES:
patent: 3628027 (1971-12-01), Brauss
patent: 4256365 (1981-03-01), Lemesle et al.
patent: 4380365 (1983-04-01), Gross
patent: 4721353 (1988-01-01), Khoe et al.
patent: 4753521 (1988-06-01), Deserno
Yamashita et al., "High-efficiency LD Coupler with a Truncated Si Spherical Lens", Technical Digest, Conference on Optical Fiber Communication, Third International Conference on Optical Fiber Sensors, '85, San Diego, 1985, pp. 48-49, TUL2.

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