公开(公告)号：EP2184868A1

公开(公告)日：2010-05-12

申请号：EP09013815.7

申请日：2009-11-03

申请人： Draka Comteq B.V.

发明人： Gholami, Asghar ,  Molin, Denis ,  Sillard, Pierre ,  Lumineau, Yves

IPC分类号： H04B10/13 ,  H04B10/18

CPC分类号： H04B10/2507 ,  H04B10/2581

摘要： An optical system comprises a polychromatic optical source (10) emitting multiple transverse modes, an optical link comprising at least one portion of multimode optical fibre (50) and an optical device (20) positioned between the optical source (10) and the input of the multimode optical fibre (50). The optical device (10) is suitable for modifying the distribution of the energy coupling of the transverse modes emitted by the source in the propagation modes of the fibre
The system of the invention makes it possible to use low-cost transverse multimode optical sources for producing high-bandwidth Ethernet transmission networks having very good performances.

摘要翻译： 光学系统包括发射多个横向模式的多色光源（10），包括多模光纤（50）的至少一部分的光链路和位于光源（10）和光源 多模光纤（50）。 光学装置（10）适用于改变在光纤的传播模式下源发射的横向模式的能量耦合的分布本发明的系统使得可以使用低成本的横向多模光源来生产 高带宽以太网传输网络具有非常好的性能。

公开(公告)号：EP2207022B1

公开(公告)日：2012-07-11

申请号：EP09075577.8

申请日：2009-12-30

申请人： Draka Comteq B.V.

发明人： Gholami, Asghar ,  Molin, Denis ,  Sillard, Pierre ,  Lumineau, Yves

IPC分类号： G01M11/02 ,  G02B6/028

CPC分类号： G02B6/0288 ,  G01M11/338

公开(公告)号：EP2144096B1

公开(公告)日：2016-01-13

申请号：EP09075278.3

申请日：2009-06-29

申请人： Draka Comteq B.V.

发明人： Gholami, Asghar ,  Molin, Denis ,  Sillard, Pierre ,  Lumineau, Yves

IPC分类号： G02B6/028 ,  G02B6/02

CPC分类号： G02B6/0288 ,  G01M11/338 ,  G02B6/02214

公开(公告)号：EP2463638A1

公开(公告)日：2012-06-13

申请号：EP12154138.7

申请日：2009-12-30

申请人： Draka Comteq B.V.

发明人： Gholami, Asghar ,  Molin, Denis ,  Sillard, Pierre ,  Lumineau, Yves

IPC分类号： G01M11/02 ,  G02B6/028

CPC分类号： G02B6/0288 ,  G01M11/338

摘要： A graded-index multimode optical fiber presenting an index profile given by the relationship: n r = { n 0 ⋅ 1 - 2 ⁢ Δ ⁢ r a α r ≤ a n 0 ⋅ 1 - 2 ⁢ Δ r ≥ a
where:
· n 0 is a refractive index on an optical axis of the fiber;
· r is a distance from said optical axis;
· a is a radius of the core of said fiber;
· Δ is a non-dimensional parameter, indicative of an index difference between the core and a cladding of the fiber; and
· α is a non-dimensional parameter, indicative of a shape of an index profile and lying in the range 2.0 to 2.1.

摘要翻译： 一种梯度折射率多模光纤，其折射率分布由下式给出：其中：·n0是光轴上的折射率 的纤维; ·r是距所述光轴的距离; ·a是所述光纤芯部的半径; ·Δ是无量纲参数，表示纤维的纤芯和包层之间的折射率差异; ·α是无量纲参数，表示折射率分布的形状并且在2.0至2.1的范围内。

公开(公告)号：EP2184868B1

公开(公告)日：2011-10-26

申请号：EP09013815.7

申请日：2009-11-03

申请人： Draka Comteq B.V.

发明人： Gholami, Asghar ,  Molin, Denis ,  Sillard, Pierre ,  Lumineau, Yves

IPC分类号： H04B10/13 ,  H04B10/18

CPC分类号： H04B10/2507 ,  H04B10/2581

公开(公告)号：EP2207022A1

公开(公告)日：2010-07-14

申请号：EP09075577.8

申请日：2009-12-30

申请人： Draka Comteq B.V.

发明人： Gholami, Asghar ,  Molin, Denis ,  Sillard, Pierre ,  Lumineau, Yves

IPC分类号： G01M11/02 ,  G02B6/028

CPC分类号： G02B6/0288 ,  G01M11/338

摘要： A method of characterizing a graded-index multimode optical fiber, the method comprising:
a) injecting a light pulse at a predefined wavelength into the core of an optical fiber that is to be characterized, via an "inlet" face thereof, said light pulse being injected with a predefined radial offset from the center of said inlet face;
b) detecting said light pulse at an "outlet" face of said optical fiber, the time characteristic of the pulse being modified by propagation along the fiber; and
c) repeating steps a) and b) for a plurality of values for said predefined radial offset;
the method being characterized in that it further comprises:
d) determining the transfer function of the optical fiber and a bandwidth characterizing said transfer function, as a function of said radial offset.
This method can be applied to selecting optical fibers after they have been produced. The invention also provides an optical fiber of the kind that can be fabricated with such a method, and a method of fabricating said optical fiber..

摘要翻译： 一种表征渐变折射率多模光纤的方法，所述方法包括：a）将预定波长的光脉冲经由其“入口”面指向要表征的光纤的芯中，所述光脉冲 从所述入口面的中心预定的径向偏移注入; b）在所述光纤的“出口”面处检测所述光脉冲，所述脉冲的时间特性通过沿着所述光纤传播来修改; 以及c）针对所述预定径向偏移的多个值重复步骤a）和b）; 该方法的特征在于，其还包括：d）根据所述径向偏移确定光纤的传递函数和表征所述传递函数的带宽。 该方法可以在生产后选择光纤。 本发明还提供可以用这种方法制造的那种光纤，以及制造所述光纤的方法。

公开(公告)号：EP2144096A1

公开(公告)日：2010-01-13

申请号：EP09075278.3

申请日：2009-06-29

申请人： Draka comteq B.V.

发明人： Gholami, Asghar ,  Molin, Denis ,  Sillard, Pierre ,  Lumineau, Yves

IPC分类号： G02B6/028

CPC分类号： G02B6/0288 ,  G01M11/338 ,  G02B6/02214

摘要： A multimode optical fiber has a refractive index profile such that a measurement of the dispersion modal delay (DMD), carried out on a DMD graph modified by adding a delay (Δt trace ) to each trace: Δ ⁢ t trace = Δ ⁢ λ max ⁢ xDxL ⁢ r trace a β where r trace is the center position of the injection of the light pulse corresponding to the trace, α is the core radius of the multimode fiber, L is the length of the fiber, D is the chromatic dispersion of the multimode fiber at the wavelength of the light pulse, β is the coefficient of the delay and Δλ max is the maximum spectral width of the source intended to be used with the fiber, produces an equivalent modal dispersion value of less than 0.11 ps/m for (Δλ max x D) > 0.07 ps/m.
The modification of the DMD graph to take account of the chromatic dispersion makes it possible to guarantee a calculated effective bandwidth EBc greater than 6000 MHz-km for multimode fibers used with multimode transverse sources.

摘要翻译： 多模光纤具有折射率分布，使得通过在每个迹线上添加延迟（“t迹线）”修改的DMD图上进行的色散模态延迟（DMD）的测量：“ ¢t trace =” ¢»max ¢xDxL ¢¢trace trace²²²r r r r D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D 是多光纤维在光脉冲波长处的色散，²是延迟系数，“»max是要与光纤一起使用的光源的最大光谱宽度，产生等效模态色散值 （“»max×D）> 0.07ps / m时小于0.11ps / m。 考虑到色散的DMD图的修改使得有可能保证与多模横向源一起使用的多模光纤的计算的有效带宽EBc大于6000MHz-km。