C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/8.8
C03B 37/04 (2006.01) C03B 37/012 (2006.01) C03B 37/027 (2006.01) G02B 6/255 (2006.01) G02B 6/26 (2006.01)
Patent
CA 1319258
- 15 - Abstract of the Disclosure An apparatus and method are disclosed for fabricating an expanded beam cylindrically terminated optical fiber taper from a reduced diameter preform rod. The present invention comprises uniformly heating the circumference of a predetermined portion at an intermediate point of the preform rod to a predetermined temperature and then uniformly pulling the preform rod while continuing to heat additional material of the preform rod to produce a pair of expanded beam cylindrically terminated optical fiber tapers connected by a predetermined length cylindrical central section of standard optical fiber having a uniform diameter less than that of the original preform rod. The cylindrical central section is then severed midway between the two expanded beam optical fiber tapers to form two separate expanded beam cylindrically terminated optical fiber tapers comprised of (1) a predetermined length cylindrical end section of uniform diameter equal to that of the originalpreform rod; (2) a reduced diameter optical fiber end section suitable for splicing onto an optical fiber of similar dimensions; and (3) a tapered section,connecting the cylindrical end section to the optical fiber end section, having a gradually decreasing diameter that will avoid mode conversion of a lightwave signal propagating therethrough.
573746
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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