Fiber optic connector with improved return loss performance

Details Fiber optic connector with improved return loss performance Fiber optic connector with improved return loss performance

1996-11-21

1998-08-18

Ngo, John

Optical waveguides

With disengagable mechanical connector

Structure surrounding optical fiber-to-fiber connection

385 38, 385 85, 385 61, 385 68, G02B 638

Patent

active

057968942

ABSTRACT:
An improved fiber optic cable connector is provided that exhibits a consistent return loss rating of 60 dB or better. The connector comprises matable connector housings that terminate the ends of respective optical cables to be joined. Within each housing, the optical fiber of the respective cable is secured within a ceramic ferrule that extends axially of the connector. The endface of each optical fiber is exposed at the end of its respective ferrule. The ends of the ferrules are ground and polished in such a way that the endfaces of the optical fibers exhibit a planar undercut with respect to the lip of the axial passageway in which the fibers are secured. When the ferrules are brought and pressed together end-to-end as the connectors are mated, the material of each ferrule compresses until the endfaces of the optical fibers engage each other with near null pressure. The result is the near elimination of pressure on the optical fiber itself, which avoids a density and index of refraction change at the junction and thus improves return loss performance.

REFERENCES:
patent: 4512630 (1985-04-01), Runge
patent: 4707071 (1987-11-01), Kraft
patent: 4850664 (1989-07-01), Iri et al.
patent: 5062682 (1991-11-01), Marazzi
patent: 5319733 (1994-06-01), Emmons et al.

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