US 12,168,625 B2
Method for manufacturing optical fiber
Itaru Ishida, Suzuka (JP)
Assigned to Fujikura Ltd., Tokyo (JP)
Appl. No. 17/602,429
Filed by Fujikura Ltd., Tokyo (JP)
PCT Filed May 7, 2020, PCT No. PCT/JP2020/018538
§ 371(c)(1), (2) Date Oct. 8, 2021,
PCT Pub. No. WO2021/019864, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 2019-141326 (JP), filed on Jul. 31, 2019.
Prior Publication US 2022/0185721 A1, Jun. 16, 2022
Int. Cl. C03B 37/025 (2006.01); C03B 37/027 (2006.01); C03B 37/03 (2006.01); C03C 25/105 (2018.01)
CPC C03B 37/0253 (2013.01) [C03B 37/027 (2013.01); C03B 37/032 (2013.01); C03C 25/105 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for manufacturing an optical fiber, comprising:
gripping a preform by a gripper that comprises an aligner;
forming a bare fiber by melting the preform in a melting furnace;
cooling the bare fiber by blowing gas in a cooler;
applying resin to an outer circumference of the bare fiber;
curing the resin;
acquiring input information on one or more factors that change a flow rate of the gas blown to the bare fiber in the cooler; and
adjusting, based on the input information, an entry position of the bare fiber into the cooler by controlling the aligner and moving the preform.