Patent
1989-12-07
1991-05-28
Sikes, William L.
350 9620, G02B 630
Patent
active
050188178
ABSTRACT:
A method of optically coupling one end of an optical fiber to a waveguide formed on a substrate, such that an end portion of the fiber is fitted in a groove formed in the substrate. The groove is formed by forming a beam-shielding mask having a cutout, on the substrate such that the cutout is aligned with a part of the substrate in which the groove is formed, and by irradiating the above-indicated part of the substrate with a high-energy beam. Alternatively, the groove is formed by a cutting tool. An inclined end surface of the groove left uncut by the tool may be irradiated with a high-energy beam, through a beam-shielding mask which has a cutout aligned with the inclined end surface. The end of the optical fiber, which has a flat face or has a coned or hemi-spherical shape, is positioned for optical coupling with a portion of the waveguide which is exposed to the groove.
REFERENCES:
patent: 4108659 (1978-08-01), Dini
patent: 4598039 (1986-07-01), Fischer et al.
patent: 4759595 (1988-07-01), Boord et al.
patent: 4765702 (1988-08-01), Dohan et al.
patent: 4877480 (1989-10-01), Das
d'Auria et al.; "High Index Microlenses for GaAlAs Laser-Fibre Coupling"; Electronics Letters; vol. 16, No. 9; Apr. 1980; pp. 322-324.
Aoki Hikoharu
Ohri Hitomi
Sako Yukihiro
Suzuki Makoto
Tsukamoto Takashi
Brother Kogyo Kabushiki Kaisha
Sikes William L.
Wise Robert E.
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