Fabrication technique for low-loss fused taper directional coupl

Details Fabrication technique for low-loss fused taper directional coupl Fabrication technique for low-loss fused taper directional coupl

1989-01-03

1990-01-23

Sikes, William L.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350 9610, 350 9616, 350 9629, 350 9630, 350320, 250227, 250231P, 250231R, 65 41, 65 42, 73800, G02B 626, G01D 534, C03B 2320, G01L 124

Patent

active

048954233

ABSTRACT:
A method of forming a single mode biconical fiber optic coupler comprising holding 2 or more optical fibers parallel to and in contact with each other at spaced apart locations, exerting equal tension in opposite directions to the fibers at said spaced apart locations to stretch the fibers, fusing the fibers over a waist region, and scanning the tip of a flame from a microtorch back and forth along the fibers at a speed which is at least five times the speed of stretching of the fibers. This results in an overcoupled low loss coupler, a pressure or a temperature sensor, comprised of at least a pair of monomode optical fibers fused and parallel at a stretched waist portion, each having biconical tapers at opposite ends of the waist portion, the coupler having exhibited at least about 500 power transfer cycles during stretching formation of the waist portion.

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