Iridium fiber draw induction furnace

Details Iridium fiber draw induction furnace Iridium fiber draw induction furnace

1993-02-25

1994-05-03

Leung, Philip H.

Electric heating

Inductive heating

With heat exchange

65 12, 65DIG4, 373162, H05B 622

Patent

active

053089472

ABSTRACT:
An induction furnace for reflowing a portion of an optical preform in order to draw a lightguide fiber therefrom. The furnace has an axially located tubular iridium susceptor which is centrally disposed within a beaker and a sleeve is positioned concentrically around the susceptor. The sleeve is surrounded by an insulating grain. A high frequency coil is energized to couple its electromagnetic field to the iridium susceptor to heat and reflow a portion of the preform in order to draw the fiber therefrom. The furnace housing is sealed to provide an inert, non-oxidizing atmosphere for the iridium susceptor.

REFERENCES:
patent: 3716345 (1973-02-01), Grabmaier
patent: 3933572 (1976-01-01), O'Connor et al.
patent: 4450333 (1984-05-01), Andrejco et al.
patent: 4533378 (1985-08-01), Paek et al.
patent: 4547644 (1985-10-01), Bair et al.
patent: 4608473 (1986-08-01), Paek et al.
R. B. Runk, "A Zirconia Induction Furnace For Drawing Precision Silica Wave Guides", Optical Fiber Transmission II, (TuB5-1) 1977.
European Search Report, EP93-300350 Apr. 12, 1993.

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