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1. 发明公开

EP1607778A1 Graded index type optical fibres and method of making the same 失效
标题翻译： Optische Faser mit verteiltem Brechnungsindex und Verfahren zu deren Herstellung
公开(公告)号：EP1607778A1
公开(公告)日：2005-12-21
申请号：EP05012186.2
申请日：1997-03-28
申请人： MITSUBISHI RAYON CO., LTD.
发明人： Yamashita, Tomoyoshi , Tahara, Yasuteru , Nakamura, Kazuki
IPC分类号： G02B6/16 , G02B6/18
CPC分类号： G02B6/02038 , B29D11/00682 , G02B6/03633
摘要： A graded index type optical fiber having a multilayer structure comprising a plurality of concentrically arranged layers formed of (co)polymers selected from the group consisting of two or more homopolymers HP1, HP2, ..., HPn derived from monomers M1, M2, ..., Mn, respectively, and having refractive indices decreasing in that order, and one or more binary copolymers CP derived from these monomers, the multilayer structure being such that a mixed layer consisting of the (co)polymers constituting two adjacent layers is formed therebetween, and the refractive index is highest at the center and decreases gradually toward the outer periphery. This optical fiber can be continuously formed by feeding the (co)polymers to a multilayer concentric circular nozzle and thereby extruding them through the nozzle, and allowing the polymers to interdiffuse between adjacent layers of the fiber.
摘要翻译：一种具有多层结构的分级折射率型光纤，其包括由选自由单体M1，M2所构成的两种或更多种均聚物HP1，HP2，...，HPn组成的组中的（共）聚合物形成的多个同心布置层。 ..，Mn，并且折射率按顺序降低，以及一种或多种衍生自这些单体的二元共聚物CP，多层结构使得由构成两个相邻层的（共）聚合物组成的混合层形成并且折射率在中心处最高，并且朝向外周逐渐减小。这种光纤可以通过将（共）聚合物馈送到多层同心圆形喷嘴，从而通过喷嘴挤出，并使聚合物在相邻的纤维层之间相互扩散，可以连续地形成。

2. 发明授权

EP1607778B1 Graded index type optical fibres and method of making the same 失效
标题翻译：一种光纤的折射率分布的，并且它们的制备方法
公开(公告)号：EP1607778B1
公开(公告)日：2009-05-13
申请号：EP05012186.2
申请日：1997-03-28
申请人： MITSUBISHI RAYON CO., LTD.
发明人： Yamashita, Tomoyoshi , Tahara, Yasuteru , Nakamura, Kazuki
IPC分类号： G02B6/02 , G02B6/028
CPC分类号： G02B6/02038 , B29D11/00682 , G02B6/03633

3. 发明授权

EP1176437B1 Graded index type optical fibres 失效
标题翻译：具有折射率梯度的光纤
公开(公告)号：EP1176437B1
公开(公告)日：2007-10-03
申请号：EP01124335.9
申请日：1998-07-27
申请人： MITSUBISHI RAYON CO., LTD.
发明人： Yamashita, Tomoyoshi , Miyauchi, Haruko , Kawarada, Yasushi , Nakamura, Kazuki , Oishi, Norizi
IPC分类号： G02B6/00 , G02B6/02 , G02B6/028 , B29D11/00
CPC分类号： G02B6/0288 , B29D11/00682 , G02B6/03633

4. 发明公开

EP1176437A3 Graded index type optical fibres 失效
标题翻译：具有折射率梯度的光纤
公开(公告)号：EP1176437A3
公开(公告)日：2002-03-13
申请号：EP01124335.9
申请日：1998-07-27
申请人： Mitsubishi Rayon Co., Ltd.
发明人： Yamashita, Tomoyoshi , Miyauchi, Haruko , Kawarada, Yasushi , Nakamura, Kazuki , Oishi, Norizi
IPC分类号： G02B6/00 , G02B6/18 , G02B6/16 , B29D11/00
CPC分类号： G02B6/0288 , B29D11/00682 , G02B6/03633
摘要： Disclosed is a graded index type optical fiber having a multilayer structure comprising a plurality of concentrically arranged non-blended layers (LNB1,LNB2,LNB3) formed of (co)polymers selected from the group consisting of two or more homopolymers composed of units of vinyl monomers and one or more binary copolymers composed of units of the vinyl monomers each of the (co)polymers having a glass transition temperature of 80°C or above, wherein the refractive index is highest at the center of the multilayer structure and decreases gradually toward the outer periphery thereof. The (co)polymers exhibit low levels of residual monomer(s) and chain transfer agent. One or more sheath layers can be formed on the outer periphery of the multilayer structure. Each pair of non-blended layers (LNB1,LNB2,LNB3) may have therebetween a blended layer (LB1,LB2) formed of the (co)polymers of those layers.

5. 发明公开

EP1176437A2 Graded index type optical fibres 失效
标题翻译：渐变折射率型光纤
公开(公告)号：EP1176437A2
公开(公告)日：2002-01-30
申请号：EP01124335.9
申请日：1998-07-27
申请人： Mitsubishi Rayon Co., Ltd.
发明人： Yamashita, Tomoyoshi , Miyauchi, Haruko , Kawarada, Yasushi , Nakamura, Kazuki , Oishi, Norizi
IPC分类号： G02B6/00 , G02B6/18 , G02B6/16 , B29D11/00
CPC分类号： G02B6/0288 , B29D11/00682 , G02B6/03633
摘要： Disclosed is a graded index type optical fiber having a multilayer structure comprising a plurality of concentrically arranged non-blended layers LNB1 to LNBm formed of (co)polymers P1 to Pm selected from the group consisting of two or more homopolymers HP1, HP2, ... and HPn composed of units of vinyl monomers M1, M2, ... and Mn, respectively (provided that the refractive indices of the homopolymers decrease in that order), and one or more binary copolymers CPs composed of units of vinyl monomers M1, M2, ... and Mn, each of (co)polymers P1 to Pm having a glass transition temperature (Tg) of 80°C or above, wherein the refractive index is highest at the center of the multilayer structure and decreases gradually toward the outer periphery thereof. This optical fiber has a small transmission loss, a large numerical aperture, and excellent resistance to moist heat.
摘要翻译：本发明公开了一种具有多层结构的渐变折射率型光纤，所述多层结构包括多个同心排列的非共混层LNB1至LNBm，所述非共混层LNB1至LNBm由选自由两种或更多种均聚物HP1，HP2，...组成的组中的（共）聚合物P1至Pm形成。以及分别由乙烯基单体M1，M2，...和Mn的单元构成的HPn（假设均聚物的折射率按此顺序降低）和一种或多种由乙烯基单体M1， M2，...和Mn的玻璃化转变温度（Tg）为80℃或更高的（共）聚合物P1至Pm，其中折射率在多层结构的中心处最高并且朝向外周。该光纤传输损耗小，数值孔径大，耐湿热性优异。

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