Optical waveguides – With optical coupler – Input/output coupler
Patent
1995-04-21
1997-02-04
Ngo, John
Optical waveguides
With optical coupler
Input/output coupler
385 35, G02B 632
Patent
active
056007442
ABSTRACT:
An optical fiber interface for coupling input light power from a light source to an optical fiber. The optical fiber has an optical axis, an incident end face extending transverse to the optical axis, a core region having a predetermined diameter, and a clad region surrounding the core region. The end face comprises a first surface portion having the shape of an element of a sphere. The sphere has a center on the optical axis and a diameter not greater than the diameter of the core region. The first surface portion of the end face is symmetrical with respect to the optical axis and extends from the optical axis along the core region toward the clad region. The end face also comprises a second surface portion having the shape of an element of a cone extending from the first surface portion of the end face along the clad region, the second surface portion being tangential to the first surface portion of the end face.
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patent: 4889399 (1989-12-01), Mariani et al.
patent: 4979334 (1990-12-01), Takahashi
Institute of Electronics, Information and Communication Engineers, (1990), "A New Scheme of Coupling from LD to SMF Utilizing a Beam-Expanding Fiber With a Hemispherical End", Shiraishi et al.
IEEE Journal of Lightwave Technology, Feb. 1993, vol. 11, No. 2, pp. 252-257, "Ideal Microlenses for Laser to Fiber Coupling", Edwards et al.
Ngo John
Seikoh Giken Co. Ltd.
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