Design and manufacture of an optimized waveguide-type multiple b

Details Design and manufacture of an optimized waveguide-type multiple b Design and manufacture of an optimized waveguide-type multiple b

1993-11-18

1996-10-29

Ngo, John

Optical waveguides

With optical coupler

Particular coupling structure

385 49, 385 14, 385 43, G02B 626

Patent

active

055704425

ABSTRACT:
The present invention is an optical device including an optical circuit in which a plurality of branched optical waveguides are connected to a light receiving side and a light ejecting side of a main optical waveguide which mixes the entering light. The branched optical waveguides include a beginning and a terminal end. The terminal end is connected to an optical fiber and the beginning end is connected to the main optical waveguide. At least one of the branched optical waveguides has a slope or taper construction which is wider at the terminal end than at the beginning end, in order to improve lost variance and to reduce loss of light signals. The present invention also provides a method for manufacturing the above-described optical device to be used in optical local networks and optical instrumentation control systems.

REFERENCES:
patent: 5129021 (1992-07-01), Mortimore et al.
S. Ohshima et al., "Small Loss-Deviation Tapered Fiber Star Coupler for LAN," Journal of Lightwave Technology, vol. LT-3, No. 3 (Jun. 1985), pp. 556-559 (New York, USA).
Nippon Denki K.K., "Plane Type Light Distributing Circuit," Patent Abstracts of Japan, vol. 9, No. 137 (P-363) (1860), Jun. 12, 1985, Abstract No. 60-17706.
Kato et al., "New Fabrication Method of a Star Coupler by Staking Polymer," Applied Optics, vol. 27, No. 15 (Aug. 1, 1988) pp. 3177-3179 (New York, NY, USA).

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