US 11,809,005 B2
Laser device
Hiroshi Tobita, Sakura (JP); and Tomoharu Kitabayashi, Sakura (JP)
Assigned to Fujikura Ltd., Tokyo (JP)
Appl. No. 17/429,219
Filed by Fujikura Ltd., Tokyo (JP)
PCT Filed Feb. 27, 2020, PCT No. PCT/JP2020/008045
§ 371(c)(1), (2) Date Aug. 6, 2021,
PCT Pub. No. WO2020/175625, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-034376 (JP), filed on Feb. 27, 2019.
Prior Publication US 2022/0128781 A1, Apr. 28, 2022
Int. Cl. G02B 6/42 (2006.01); G08B 21/18 (2006.01)
CPC G02B 6/4278 (2013.01) [G08B 21/18 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A laser device, comprising:
a light source that outputs a laser beam;
an optical fiber that propagates the laser beam;
a cable coating in which the optical fiber is inserted;
an optical connector connected to a tip of the cable coating;
a pair of disconnection detection lines consisting of a first disconnection detection line and a second disconnection detection line that are inserted through the cable coating and that detect a disconnection of the optical fiber,
wherein a first end portion of the first disconnection detection line and a first end portion of the second disconnection detection line are disposed inside the optical connector and are electrically connected inside the optical connector;
a pair of open detection lines consisting of a first open detection line and a second open detection line, wherein a first end portion of the first open detection line and a first end portion of a second open detection line are disposed inside the optical connector and are electrically disconnected inside the optical connector; and
a determination portion to which a second end portion of the first disconnection detection line, a second end portion of the second disconnection detection line, a second end portion of the first open detection line, and a second end portion of the second open detection line are connected.