US 12,066,655 B2
Terminated hollow-core fiber with endcap
Stuart Campbell, Lindome (SE); Rasmus Kihlberg, Gothenburg (SE); and Mats Blomqvist, Sävedalen (SE)
Assigned to Optoskand AB, Mölndal (SE)
Filed by Optoskand AB, Mölndal (SE)
Filed on Dec. 14, 2021, as Appl. No. 17/551,117.
Prior Publication US 2023/0185019 A1, Jun. 15, 2023
Int. Cl. G02B 6/02 (2006.01); G02B 6/255 (2006.01)
CPC G02B 6/02328 (2013.01) [G02B 6/255 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A terminated hollow-core optical fiber, comprising:
a capillary having (a) first and second end faces facing in mutually-opposite directions and (b) an inner cylindrical surface extending from the first end face to the second end face and defining a bore of the capillary;
a hollow-core optical fiber including a structured cladding and having a first end that terminates in the bore of the capillary a non-zero distance away from the first end face of the capillary, the hollow-core optical fiber being adhered to the capillary at the second end face of the capillary where the hollow-core optical fiber extends out of the capillary; and
an endcap directly abutted and fused to the first end face of the capillary, the endcap having a larger diameter than the first end of the hollow-core optical fiber.