US 12,291,481 B2
Method for manufacturing optical fiber
Iwao Okazaki, Osaka (JP); Yuuki Shibuya, Osaka (JP); and Keisei Morita, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 18/555,974
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Mar. 31, 2022, PCT No. PCT/JP2022/016563
§ 371(c)(1), (2) Date Oct. 18, 2023,
PCT Pub. No. WO2022/224798, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 2021-073480 (JP), filed on Apr. 23, 2021.
Prior Publication US 2024/0199480 A1, Jun. 20, 2024
Int. Cl. C03C 25/1065 (2018.01); C03C 25/20 (2006.01); C03C 25/26 (2018.01)
CPC C03C 25/1065 (2013.01) [C03C 25/20 (2013.01); C03C 25/26 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for manufacturing an optical fiber by coating a first resin on a glass fiber drawn from a glass base material, and curing the first resin to form a first coating, the method comprising:
causing the glass fiber to travel at a first velocity during a first time period;
increasing the velocity of the glass fiber from the first velocity to a second velocity during a second time period following the first time period; and
maintaining the velocity of the glass fiber at the second velocity during a third time period following the second time period,
wherein TB2/TB1 is greater than 1.0 and less than or equal to 11.0, where TB1 denotes a thickness of the first coating in the increasing, from a start of coating the first resin to a time when the velocity reaches a third velocity that is higher than the first velocity and lower than the second velocity, and TB2 denotes a thickness of the first coating in the maintaining.