公开(公告)号：US10604440B2

公开(公告)日：2020-03-31

申请号：US15743673

申请日：2016-07-13

Applicant: J-FIBER GMBH

Inventor： Robert Hanf ,  Christian Genz ,  Lothar Brehm

IPC: C03B37/018 ,  C03B37/025

Abstract: A method for a defined deposition of a glass layer on an inner wall of a preform for an optical fiber and/or for setting a refractive index profile of the preform for a multi-mode fiber. The method includes providing the preform having a cavity and an inner wall which defines an inner diameter of the preform, and spreading a deposition gas at a flow speed (v) in the cavity of the preform so as to provide the defined deposition of the glass layer. The defined deposition is performed at a reduced change in the flow speed a*Δv, where a

公开(公告)号：US08805145B2

公开(公告)日：2014-08-12

申请号：US13654975

申请日：2012-10-18

Applicant: J-Fiber GMBH

Inventor： Wolfgang Hämmerle ,  Harald Hein ,  Christian Genz ,  Lothar Brehm ,  Falk Wirth

IPC: G02B6/02

CPC classification number: G02B6/0365 ,  G02B6/0288

Abstract: The invention relates to a bend insensitive gradient index multimode light conducting fiber comprising a leakage mode dependent optical core diameter that is uniform over its length and numerical aperture that is uniform over its length, a core (1), an inner cladding (2), a refraction index trench (3) and an outer cladding (4), wherein the core (1) includes a core radius R1, an alpha-refraction index profile and a core refraction index difference dn1 with respect to the outer cladding (4), wherein the refraction index trench (3) includes a refraction index trench radius R3 and a trench refraction index difference dn3 with respect to the outer cladding (4), wherein the outer cladding (4) includes an outer cladding radius R4 and a refraction index between 1.40 and 1.55, wherein for a light wavelength of 850 nm and an overfilled launch (OFL), the optical core diameter for a fiber length in a range between 2 m and 300 m decreases by less than 5% and the numerical aperture decreases by less than 2.5% and the curvature related attenuation increase for two turns and a curvature radius of 7.5 mm is less than 0.2 db.

Abstract translation: 本发明涉及一种弯曲不敏感梯度折射率多模光导纤维，其包括在其长度上均匀的泄漏模式相关光纤芯直径和在其长度上均匀的数值孔径;芯（1），内包层（2）， 折射折射率沟槽（3）和外包层（4），其中芯部（1）包括芯部半径R1，α折射率分布和相对于外包层（4）的芯折射率差dn1， 其中所述折射折射沟槽（3）包括相对于所述外包层（4）的折射率折射率沟槽半径R3和沟槽折射率差dn3，其中所述外包层（4）包括外包层半径R4和 1.40和1.55，其中对于850nm的光波长和过满的发射（OFL），在2μm和300μm之间的范围内的光纤长度的光纤芯直径减小小于5％，并且数值孔径减小 超过2.5％，曲率相关衰减增加两圈，曲率半径为7.5mm小于0.2db。

公开(公告)号：US20140020431A1

公开(公告)日：2014-01-23

申请号：US13945142

申请日：2013-07-18

Applicant: j-fiber GmbH

Inventor： Christian Genz ,  Wolfgang Haemmerle ,  Lothar Brehm

IPC: C03B37/018

CPC classification number: C03B37/01815 ,  C03B2203/26 ,  C03B2207/66 ,  C03B2207/70

Abstract: Methods for making a preform for a graded-index multimode fiber by using an inside deposition process are disclosed. The methods are characterized by an iterative refractive index profile correction with the following steps: determining a target refractive index profile for the preform to be produced, carrying out an inside deposition process with fixed volume flows for the reacting gases inside a tube and a given burner speed for all deposited layers, collapsing the tube and measuring the actual refractive index profile, comparing the target profile with the actual profile and calculating a correction value of index differences, converting this correction value in corrected burner speeds as varying process parameter, carrying out a inside deposition process with fixed gas flows and corrected burner speeds for all layers to be deposited.

Abstract translation: 公开了通过使用内部沉积工艺制备用于渐变折射率多模光纤的预成型件的方法。 该方法的特征在于迭代折射率分布校正，具有以下步骤：确定待生产的预成型件的目标折射率分布，对于管内和给定的燃烧器内的反应气体进行固定体积流的内部沉积工艺 对所有沉积层进行速度，塌缩管并测量实际折射率分布，将目标轮廓与实际轮廓进行比较，并计算折射率差异的校正值，将校正的燃烧器速度中的该校正值转换为变化的过程参数，执行 内部沉积过程中具有固定气体流量和校正的燃烧器速度，用于所有层的沉积。

公开(公告)号：US09249046B2

公开(公告)日：2016-02-02

申请号：US13945142

申请日：2013-07-18

Applicant: j-fiber GmbH

Inventor： Christian Genz ,  Wolfgang Haemmerle ,  Lothar Brehm

IPC: C03B37/018

CPC classification number: C03B37/01815 ,  C03B2203/26 ,  C03B2207/66 ,  C03B2207/70

Abstract: Methods for making a preform for a graded-index multimode fiber by using an inside deposition process are disclosed. The methods are characterized by an iterative refractive index profile correction with the following steps: determining a target refractive index profile for the preform to be produced, carrying out an inside deposition process with fixed volume flows for the reacting gases inside a tube and a given burner speed for all deposited layers, collapsing the tube and measuring the actual refractive index profile, comparing the target profile with the actual profile and calculating a correction value of index differences, converting this correction value in corrected burner speeds as varying process parameter, carrying out a inside deposition process with fixed gas flows and corrected burner speeds for all layers to be deposited.

Abstract translation: 公开了通过使用内部沉积工艺制备用于渐变折射率多模光纤的预成型件的方法。 该方法的特征在于迭代折射率分布校正，具有以下步骤：确定待生产的预成型件的目标折射率分布，对于管内和给定的燃烧器内的反应气体进行固定体积流的内部沉积工艺 对所有沉积层进行速度，塌缩管并测量实际折射率分布，将目标轮廓与实际轮廓进行比较，并计算折射率差异的校正值，将校正的燃烧器速度中的该校正值转换为变化的过程参数，执行 内部沉积过程中具有固定气体流量和校正的燃烧器速度，用于所有层的沉积。

公开(公告)号：US09164229B2

公开(公告)日：2015-10-20

申请号：US14339030

申请日：2014-07-23

Applicant: J-FIBER GMBH

Inventor： Wolfgang Hämmerle ,  Christian Genz ,  Lothar Brehm ,  Falk Wirth

IPC: G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  G02B6/12

CPC classification number: G02B6/0288 ,  G02B6/03622 ,  G02B6/03627 ,  G02B6/0365 ,  G02B2006/12119

Abstract: The invention relates to a bend insensitive gradient index multi-mode light conducting fiber comprising a leakage mode dependent optical core diameter that is uniform over its length and a numerical aperture that is uniform over its length, wherein for a light wavelength of 850 nm and an overfilled launch (OFL), the optical core diameter for a fiber length in a range between 2 m and 100 m decreases by less than 5% and the numerical aperture decreases by less than 2.5% and the curvature related attenuation increase for two turns and a curvature radius of 7.5 mm is less than 0.2 db.

Abstract translation: 本发明涉及一种弯曲不敏感梯度折射率多模光导纤维，其包括在其长度上均匀的泄漏模式相关光纤芯径和在其长度上均匀的数值孔径，其中对于850nm的光波长和 过满的发射（OFL），光纤长度在2μm和100μm之间的光纤直径减小了小于5％，数值孔径减小了小于2.5％，曲率相关衰减增加了两圈， 曲率半径7.5mm小于0.2db。