Polarization-splitting fiber coupler and method of making same

Details Polarization-splitting fiber coupler and method of making same Polarization-splitting fiber coupler and method of making same

1993-08-03

1995-05-30

Healy, Brian

Optical waveguides

With optical coupler

Particular coupling structure

385 11, 385 42, 385 50, 385 96, 65411, 65435, G02B 610, C03B 2320

Patent

active

054209498

ABSTRACT:
Disclosed is a polarization-splitting fiber coupler capable of stably executing a polarization separation/coupling and a method of stably manufacturing the polarization-splitting fiber coupler at a low cost. The method comprises the steps of (1) arranging a plurality of non-polarization fibers in parallel so that the side surfaces thereof come into contact to each other; (2) heating and fusing a portion of the arranged non-polarization fibers by controlling a heating temperature and a heating time so that the cross section of the fused portion thereof has an aspect ratio of 1.85-1.95; (3) thereafter, forming a fused/drawn portion by drawing the fused portion while keeping the aspect ratio after lowering the heating temperature; and (4) connecting polarization-maintaining fibers to the respective ends of the fused/drawn portion, respectively. Further, a portion of the connected polarization-maintaining fiber is heated and drawn to a taper-shape to provide the heated-fused portion with a polarizer function.

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