Coupler for a graded index fiber

Details Coupler for a graded index fiber Coupler for a graded index fiber

1979-11-06

1981-02-24

Clark, Conrad J.

350 9631, 350 9633, G02B 514

Patent

active

042524032

ABSTRACT:
A concentric core fiber having a low numerical aperture has an end face aligned with the end face of a graded index fiber having a high numerical aperture. The inner core of the concentric core fiber is aligned with and faces the central region of the graded index fiber, while the outer core of the concentric core fiber is aligned with the outer periphery of the inner core of the graded index fiber. In this manner, low order modes which propagate in the inner core of the concentric core fiber are coupled to the central region of the graded index fiber. Higher order modes which propagate in the outer core of the concentric core fiber are applied to the inner core of the graded index fiber and propagate at the edges thereof.

REFERENCES:
patent: 4000416 (1976-12-01), Goell
patent: 4140505 (1979-02-01), Ramsay et al.
patent: 4149772 (1979-04-01), Iyengar et al.
patent: 4201447 (1980-05-01), Thompson et al.
"Fiber Optic Developments", Electronics, vol. 49, No. 16, Aug. 1976, pp. 96-101.

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