METHOD FOR FORMING OPTICAL FIBER

METHOD FOR FORMING OPTICAL FIBER

PROBLEM TO BE SOLVED: To reduce attenuation of a glass optical fiber due to heat aging and Rayleigh scattering in a heat treatment of the fiber. SOLUTION: In the method for forming an optical fiber, the optical fiber is formed by drawing at ≥10 m/sec draw rate from a heated glass source (block 10) a...

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Hauptverfasser: POWERS DALE R, FOSTER JOHN D, LACY CLAUDE L, PENG YING LISA, TARPLEE JENNIFER L, MATTHEWS HAZEL B, DANIEL W HOOTOFU, QUINN RICHARD A, WALCZAK WANDA J, MIECZKOWSKI DANIEL
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Zusammenfassung:PROBLEM TO BE SOLVED: To reduce attenuation of a glass optical fiber due to heat aging and Rayleigh scattering in a heat treatment of the fiber. SOLUTION: In the method for forming an optical fiber, the optical fiber is formed by drawing at ≥10 m/sec draw rate from a heated glass source (block 10) and is heat-treated by maintaining the optical fiber within a heated treatment zone for the total resident time of 0.07-0.25 sec, while subjecting the optical fiber to an average cooling rate of 1,200-5,000 °C/sec defined by ä[fiber surface temperature in an inlet zone]-[fiber surface temperature in the outlet zone]}/[the total resident time of the optical fiber in the treatment zone] (block 20). COPYRIGHT: (C)2005,JPO&NCIPI