US 12,085,754 B2
Method for producing optical fiber with laser stripping step, and optical fiber thereof
Hiroshi Kohda, Osaka (JP); and Suguru Takasaki, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 16/970,764
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Feb. 21, 2019, PCT No. PCT/JP2019/006591
§ 371(c)(1), (2) Date Aug. 18, 2020,
PCT Pub. No. WO2019/163901, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. 2018-030146 (JP), filed on Feb. 22, 2018.
Prior Publication US 2021/0096299 A1, Apr. 1, 2021
Int. Cl. G02B 6/245 (2006.01); B23K 26/0622 (2014.01); B23K 26/073 (2006.01); B23K 26/08 (2014.01); B23K 26/082 (2014.01); B23K 26/38 (2014.01); C03C 25/48 (2006.01); C03C 25/6208 (2018.01); G02B 6/255 (2006.01)
CPC G02B 6/245 (2013.01) [B23K 26/082 (2015.10); B23K 26/0823 (2013.01); B23K 26/38 (2013.01); C03C 25/48 (2013.01); C03C 25/6208 (2018.01); B23K 26/0624 (2015.10); B23K 26/073 (2013.01); G02B 6/255 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for manufacturing an optical fiber, the method comprising:
a stripping step of partially stripping a coating layer of the optical fiber;
a splicing step of fusion-splicing an exposed end surface of a glass fiber; and
a recoating step of recoating a protective resin covering a stripped portion of the coating layer and an exposed portion of the glass fiber,
wherein the stripping step is a step of irradiating the coating layer with a laser light to strip the coating layer, and
wherein a pulse width of the laser light is 15 ps or more and 500 ps or less.