Photocoupler and method for producing the same

Details Photocoupler and method for producing the same Photocoupler and method for producing the same

1997-10-29

2000-02-01

Ngo, Hung N.

Optical waveguides

With optical coupler

Input/output coupler

385 43, 385147, 385130, 385131, 359900, G02B 626

Patent

active

06021239&

ABSTRACT:
A photocoupler according to the present invention includes: an optical waveguide including a substrate, at least a first dielectric layer provided on the substrate, the first dielectric layer having a tapered structure whose thickness varies in an x-direction in which light is propagated after coupling, and a second dielectric layer provided on the first dielectric layer; a light incidence component provided above the optical waveguide, which causes light incident thereon to be directed toward a surface of the optical waveguide at a prescribed angle; and a bonding section for bonding the light incidence component to the optical waveguide. The bonding section has an edge surface which makes contact with the surface of the waveguide in a straight line and has a portion which makes contact with neither the light incidence component nor the surface of the optical waveguide. The tapered structure of the first dielectric layer has a shape set such that a radiation pattern of light with a wavelength .lambda. output from the optical waveguide of the photocoupler fulfills the following expression:

REFERENCES:
patent: 4637684 (1987-01-01), Tomita et al.
patent: 4932743 (1990-06-01), Isobe et al.
patent: 5199452 (1993-04-01), Yokomori et al.
patent: 5208800 (1993-05-01), Isobe et al.
patent: 5235589 (1993-08-01), Yokomori et al.

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