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5 条记录 (耗时 0.017 秒)

    OPTICAL FIBER
    1.
    发明公开
    OPTICAL FIBER 审中-公开

    公开(公告)号：EP4145196A1

    公开(公告)日：2023-03-08

    申请号：EP20888741.4

    申请日：2020-11-02

    申请人： Zhongtian Technology Fiber Potics Co., Ltd ,  Jiangsu Zhongtian Technology Co., Ltd. ,  Jiangdong Science and Technology Co., Ltd ,  Zhongtian Technology Advanced Materials Co., Ltd.

    发明人： CAO, Shanshan ,  LIU, Zhizhong ,  SHEN, Yichun ,  JIANG, Xinli ,  WANG, Zhen ,  XU, Haitao ,  QIAN, Yigang ,  XUE, Chi ,  SU, Haiyan

    IPC分类号： G02B6/036 ,  G02B6/028

    摘要： An optical fiber includes, from inside to outside, a core layer, a buffer cladding layer, a recessed cladding layer, a deep fluorine doped layer, an external cladding layer, and a coating layer. The core layer is germanium doped silica. A refractive index difference between the core layer and silica is 0.37 % to 0.5 %. A refractive index of the buffer cladding layer gradual changes along the buffer cladding layer. A refractive index difference between an internal interface of the buffer cladding layer contacting with the core layer and silica is -0.05 % to 0.1 %. A refractive index of an external interface of the buffer cladding layer contacting with the recessed cladding layer is equal to a refractive index of the recessed cladding layer. A refractive index difference between the recessed cladding layer and silica is -0.12 % to -0.2 %. A refractive index difference between the deep fluorine doped layer and silica is -0.3 % to -0.5 %. The external cladding layer is made of silica. The coating layer is coated outside the external cladding layer. The optical fiber has large mode field diameter and good bending resistance.

    NOVEL OPTICAL FIBER
    2.
    发明公开
    NOVEL OPTICAL FIBER 审中-公开

    公开(公告)号：EP3904925A1

    公开(公告)日：2021-11-03

    申请号：EP18900575.4

    申请日：2018-12-29

    申请人： Zhongtian Technology Fiber Potics Co., Ltd ,  Jiangsu Zhongtian Technology Co., Ltd. ,  Zhongtian Technology Advanced Materials Co., Ltd. ,  Jiangdong Science and Technology Co., Ltd

    发明人： CAO, Shanshan ,  JIANG, Xinli ,  LIU, Zhizhong ,  SHEN, Yichun ,  WANG, Zhen ,  SU, Haiyan ,  XU, Haitao

    IPC分类号： G02B6/02

    摘要： The invention provides a novel optical fiber includes a single-mode core, a multi-mode layer and an outer cover layer coaxially disposed from the inside to the outside. The single-mode core is located at a center of the optical fiber and has an upper step index. The multi-mode layer surrounds the single-mode core and has a refractive index of α-profile distribution. A plurality of transition layers disposed on an inner side and/or an outer side of the multi-mode layer. The transition layers are coaxial with the single-mode core or the outer cover layer, and cling to the multi-mode layer. A refractive index of the transition layers is equal to a refractive index of a contact portion of the multi-mode layer which is in contact with the transition layers. The novel optical fiber of the invention has both single-mode transmission and multi-mode transmission, which greatly simplifies optical cable management of data centers, reduces upgrade cost of transceivers in future, and has a good low loss characteristic by including transition layers. Another design contains a lower doped layer or a recessed layer to give the optical fiber better resistance to bending.

    OPTICAL FIBER
    3.
    发明公开
    OPTICAL FIBER 审中-公开

    公开(公告)号：EP3872045A1

    公开(公告)日：2021-09-01

    申请号：EP19937358.0

    申请日：2019-12-26

    申请人： Zhongtian Technology Fiber Potics Co., Ltd ,  Jiangsu Zhongtian Technology Co., Ltd. ,  Jiangdong Science and Technology Co., Ltd

    发明人： DING, Chunlai ,  YANG, Guojie ,  CAO, Shanshan ,  WANG, Zhen ,  XU, Haitao ,  YOU, Guanglei ,  LIU, Zhizhong ,  SU, Haiyan ,  XUE, Chi ,  XUE, Jiping

    IPC分类号： C03C13/04 ,  C03C25/1065 ,  C03C25/50 ,  C03C25/328

    摘要： An optical fiber includes, from inside to outside, a quartz core layer, a quartz cladding layer, a primary coating layer made of a first polyimide coating material having a viscosity of 5000 to 8000 cps, and a secondary coating layer made of a second polyimide coating material having a viscosity of 6000 to 7000 cps. The optical fiber is resistant to temperatures of 300 to 350 degrees Celsius. The optical fiber of the present disclosure has two polyimide coating layers. By controlling the viscosity and the respective formulas of the polyimides, the optical fiber is not only resistant to high temperatures but also has low attenuation and high mechanical strength. The optical fiber is resistant to the temperature of 300 to 350 degrees Celsius. The attenuation is less than or equal to 0.8 dB/km at 1310nm, and less than or equal to 0.6dB/km at 1550nm. The screening strength is higher than 100kpsi. The optical fiber can be used in harsh environments, which has high corrosion resistance and reliability. The optical fiber can also be used in seabed.