Method of forming multiport optical fibre coupler and the couple

Details Method of forming multiport optical fibre coupler and the couple Method of forming multiport optical fibre coupler and the couple

1993-03-18

1994-12-13

Epps, Georgia Y.

Optical waveguides

With optical coupler

Particular coupling structure

385 42, G02B 626

Patent

active

053735722

ABSTRACT:
A method of forming a multiport optical fiber coupler in which a bundle of seven optical fibers are located in close-packed hexagonal array within a capillary tube and twisted. An optical source is coupled to an outer fiber. A fused, tapered coupler is formed, the tapering being stopped when the minimum of optical power outputs is first maximized. This provides a 6.times.7 optical fiber coupler. Also disclosed is a 7.times.7 optical fiber coupler formed by fusing the coupler during formation sufficiently to provide that the maximum insertion loss through the device between any input and output is minimized.

REFERENCES:
patent: 5175779 (1992-12-01), Mortimore
patent: 5175782 (1992-12-01), Bowen et al.
patent: 5185832 (1993-02-01), Coutandin et al.
patent: 5195151 (1993-03-01), Campbell, Jr. et al.
Applied Optics, vol. 29, 20 Jan. 1990, Optical Soc. of America, New York, Mortimore: "Theory and Fabrication of 4.times.4 Single-Mode Fused Optical Fibre Couplers," pp. 371-374.
Patent Abstracts of Japan, vol. 13, No. 9, 11 Jan. 1989, & JP A63217314 (Nippon Telegr. and Teleph. Corp.) 9 Jan. 1988 (abstract).
EPO Search Report.
Electronic Letters, vol. 24, No. 9, 27 Apr. 1989, Stevenage; Mortimore et al: "Monolithic Wavelength-Flattened 2.times.7 Single-Mode Fused Couler," pp. 606-607.

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