US 12,345,941 B2
Foamed tube having free space around ribbon stacks of optical fiber cable
Anne Germaine Bringuier, Taylorsville, NC (US); Xiaole Cheng, Painted Post, NY (US); and Sergey Vladimirovich Chernykh, Hickory, NC (US)
Assigned to CORNING RESEARCH & DEVELOPMENT CORPORATION, Corning, NY (US)
Filed by CORNING RESEARCH & DEVELOPMENT CORPORATION, Corning, NY (US)
Filed on Jan. 5, 2024, as Appl. No. 18/405,050.
Application 18/405,050 is a continuation of application No. 18/084,857, filed on Dec. 20, 2022, granted, now 11,880,083.
Application 18/084,857 is a continuation of application No. PCT/US2021/038355, filed on Jun. 22, 2021.
Claims priority of provisional application 63/046,208, filed on Jun. 30, 2020.
Prior Publication US 2024/0142739 A1, May 2, 2024
Int. Cl. G02B 6/44 (2006.01)
CPC G02B 6/4486 (2013.01) [G02B 6/448 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical fiber cable comprising:
a cable jacket having an inner jacket surface, wherein the inner jacket surface defines an internal jacket bore; and
a subunit disposed within the internal jacket bore, the subunit comprising:
a foamed tube having an inner subunit surface, the inner subunit surface defining a central subunit bore; and
an optical fiber ribbon disposed within the central subunit bore of the foamed tube, the optical fiber ribbon comprising at least two optical fibers, wherein no wrap or sheath is disposed between the optical fiber ribbon and the foamed tube.