US 12,345,914 B2
Hollow-core microstructure optical fiber preform, optical fiber and method for manufacturing thereof
Peng Li, Hubei (CN); Xiaobo Lan, Hubei (CN); Jie Luo, Hubei (CN); Qiaoli Tian, Hubei (CN); Lei Zhang, Hubei (CN); Xin Tan, Hubei (CN); and Mingfeng Mao, Hubei (CN)
Assigned to YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY, Hubei (CN)
Filed by YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY, Hubei (CN)
Filed on Sep. 13, 2023, as Appl. No. 18/367,599.
Claims priority of application No. 202210835015.4 (CN), filed on Jul. 15, 2022.
Prior Publication US 2024/0019630 A1, Jan. 18, 2024
Int. Cl. G02B 6/02 (2006.01); C03B 37/012 (2006.01)
CPC G02B 6/02328 (2013.01) [C03B 37/01208 (2013.01); G02B 6/02304 (2013.01); G02B 6/02338 (2013.01); G02B 6/02366 (2013.01); C03B 2203/16 (2013.01); C03B 2203/42 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A hollow-core microstructure optical fiber preform, comprising:
a cladding hollow-core sleeve and a plurality of nested structure units arranged on an inner wall of the cladding hollow-core sleeve,
wherein the nested structure units are used to form an air fiber core region with a size of a tangential circle of the nested structure units; and
wherein each of the nested structure units comprises a multi-layered nested glass tube having at least an outer glass tube and an inner glass tube nested in the outer glass tube; and at least one support sheet is provided between the adjacently nested inner and outer glass tubes in the multi-layered nested glass tube to firmly fix the adjacently nested inner and outer glass tubes along an axis (length) of the multi-layered nested glass tube, thereby forming at least seven (7) reflection surfaces by the adjacently nested inner and outer glass tubes after being drawn into fibers.