Fiberoptic couplers having spacer fibers that have no optical co

Details Fiberoptic couplers having spacer fibers that have no optical co Fiberoptic couplers having spacer fibers that have no optical co

1993-04-06

1995-10-17

Ullah, Akm E.

Optical waveguides

With optical coupler

Particular coupling structure

385 43, 385 46, 385 48, 385114, 385126, G02B 626

Patent

active

054598044

ABSTRACT:
The invention is a fiberoptic coupler formed by multiple optical fibers each having a core and a surrounding cladding and at least one spacer fiber having the refraction index substantially matched to the refraction index of the cladding of at least one adjacent optical fiber. The optical and spacer fibers are arranged, over a region extending axially through a limited length coupling region, in a side-by-side configuration wherein each fiber touches neighboring fibers. The coupling region is created by laterally fusing all fibers and is adapted to couple propagating modes of light between the optical fibers. Various configurations of the coupler include an arrangement of seven equal diameter fibers with a center fiber surrounded by six fibers, or an arrangement of nineteen equal diameter fibers with a center fiber surrounded by a first ring of six close-packed fibers and a second ring of twelve close-packed fibers. The number of the optical fibers and spacer fibers and their relative arrangements are selected to achieve desired properties of the coupler such as a number of optical input and output fibers, the coupling ratio or wavelength dependent coupling.

REFERENCES:
patent: 3554721 (1971-01-01), Gardner
patent: 3579316 (1971-05-01), Dycott et al.
patent: 4474431 (1984-10-01), Bricheno
patent: 4586784 (1986-05-01), Tremblay et al.
patent: 4632513 (1986-12-01), Stowe et al.
patent: 4746185 (1988-05-01), Shahidi-Hamedani
patent: 4798436 (1989-01-01), Mortimore
patent: 4798438 (1989-01-01), Moore et al.
patent: 4869570 (1989-09-01), Yokohama et al.
patent: 4923268 (1990-05-01), Xu
patent: 4986620 (1991-01-01), Severijns et al.
patent: 4997247 (1991-03-01), Stowe
patent: 4997248 (1991-03-01), Stowe
patent: 5015058 (1991-05-01), Thorncraft et al.
patent: 5121452 (1992-06-01), Stowe et al.
patent: 5129021 (1992-07-01), Mortimore et al.
patent: 5137351 (1992-08-01), So
patent: 5148509 (1992-09-01), Kannabiran
patent: 5166994 (1992-11-01), Stowe et al.
patent: 5175779 (1992-12-01), Mortimore
patent: 5175782 (1992-12-01), Bowen et al.
patent: 5268979 (1993-12-01), Weidman
Snyder, Allan W., Journal of the Optical Society of America, "Coupled-Mode Theory for Optical Fibers", pp. 1267-1277, vol. 62, No. 11, Nov. 1972.
D. B. Mortimore et al., Electronics Letters, "Low-Loss Joints Between Dissimilar Fibres by Tapering Fusion Splices,"pp. 318-319, vol. 22, No. 6, Mar. 13, 1986.
Mortimore, "Theory and Fabrication of 4X4 single-mode fused optical fiber coupler", Applied Optics, vol. 29, No. 3,pp. 371-374, Jan. 20, 1990.
Mortimore, "Wavelength-flattened fused couplers", Electronic Letters vol. 21, No. 17, Aug. 15, 1985.

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