Optical waveguides – With disengagable mechanical connector – Optical fiber to a nonfiber optical device connector
Patent
1995-02-22
1995-12-26
Bovernick, Rodney B.
Optical waveguides
With disengagable mechanical connector
Optical fiber to a nonfiber optical device connector
G02B 636
Patent
active
054795494
ABSTRACT:
In a coupling structure for directly coupling a semiconductor laser to an optical fiber without using a lens, a coupling structure is provided which is superior in producibility, low in coupling loss and stable in operation of the semiconductor laser, by removing an influence of a return light due to Fresnel reflection from an end face of the optical fiber. A re-combination of the semiconductor laser to an active layer of the optical fiber is prevented by scattering a reflection light at the end face of the optical fiber by positively increasing a surface roughness Rz of the end face of the optical fiber to a range from 0.04 .mu.m to 0.06 .mu.m. The end face is formed by cutting the optical fiber with a blade saw having abrasive of particle size in a range from #1000 gauge to #2000 gauge corresponding to a range from 8 .mu.m to 20 .mu.m. The end face may be polished with abrasive having size in a rage from #1000 to #2000 gauge.
REFERENCES:
patent: 4639130 (1987-01-01), Koike et al.
patent: 4676231 (1987-06-01), Hisazumi et al.
patent: 4786132 (1988-11-01), Gordon
patent: 4966429 (1990-10-01), Stephens et al.
Bovernick Rodney B.
NEC Corporation
Ngo John
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