Optical waveguides – With optical coupler – Particular coupling structure
Patent
1996-05-28
1998-02-24
Palmer, Phan T. H.
Optical waveguides
With optical coupler
Particular coupling structure
385 89, 385 14, G02B 630
Patent
active
057217971
ABSTRACT:
A laser mounting configuration and method that enables a laser to be mounted onto a substrate in an orientation that passively aligns the laser with and adjacent optical fiber or optical waveguide. In an application with an optical fiber, a structure is formed in the substrate to retain the optical fiber at a fixed position. Ridges are formed in the substrate at a known orientation with respect to where the optical fiber is held. When the laser is applied to the substrate, the ridges on the substrate engage grooves formed on the bottom of the laser, thereby orienting the laser. In an application with an optical waveguide, a trench is formed in the substrate. The optical waveguide is formed partially within the trench so that the core of the waveguide is at the same height as the active layer of the laser when the laser lays flush on the substrate. Alignment stops are formed on the substrate at predetermined positions with respect to the waveguide. When the laser is brought into abutment with the alignment stops, the laser becomes properly aligned with the core of the optical waveguide.
REFERENCES:
patent: 5182782 (1993-01-01), Tabasky et al.
patent: 5475775 (1995-12-01), Kragl et al.
patent: 5548673 (1996-08-01), Kitamura et al.
Eugene D. Jungbluth, "Hybrid technnique couples laser array to fibers," Laser Focus World, May 1991 p. 217.
Peter Fletcher, "Inexpensive Assembly Technique Promises to Radically Cut the Cost of 1.55 .mu.m Optical Communication Lasers", Electronic Design, Jun. 1995, pp. 32-33.
Basavanhally Nagesh Ramamoorthy
Henein Gerard Edmond
Joyner Charles H.
Koren Uziel
Lucent Technologies - Inc.
Palmer Phan T. H.
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