Ensheathed optical fiber and coupling method

Details Ensheathed optical fiber and coupling method Ensheathed optical fiber and coupling method

1984-06-18

1987-12-01

Sikes, William L.

350 9610, 350 9615, 350 9631, 65 311, G02B 616, G02B 626

Patent

active

047099860

ABSTRACT:
A single-mode optical fiber transmission line suited for coupling to another fiber through a laterally coupled splice includes a core having a selected diameter, a cladding layer that surrounds the core and has a cladding thickness between one and two core diameters, and an auxiliary cladding into which the optical fiber is nested. The auxiliary cladding has an index of refraction not substantially greater than that of the cladding layer that surrounds the core, an inside dimension greater than that of the outside dimension of the optical fiber, at least partially surrounds the optical fiber and is attached to the optical fiber at least along one lineal connection zone. An optical fiber in accordance with the present invention may be spliced by freeing the optical fiber from the auxiliary cladding by, for example, dissolving the lineal connection zone with dilute hydrofluoric acid, fracturing and removing the auxiliary cladding from the freed cladding and core structure and effecting a lateral coupling splice with a similarly prepared optical fiber.

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