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公开(公告)号：US06609834B2
公开(公告)日：2003-08-26
申请号：US09932911
申请日：2001-08-20
IPC分类号： G02B638
CPC分类号： H04B10/2581
摘要： A method and apparatus is provided for connecting an optical source to a multimode optical fibre in a multimode optical fibre communications system. A single mode fibre length is provided such that optical radiation admitted from an optical source at one end of the single mode fibre length is provided to a multimode optical fibre at the other end of the single mode fibre length. This method and apparatus is used in a duplex patchcord for connecting an optical transceiver to a pair of installed multimode fibres. The second fibre in the patchcord is a multimode fibre for passing optical signals to the optical receiver of the transceiver.
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公开(公告)号：US06430230B1
公开(公告)日：2002-08-06
申请号：US09343630
申请日：1999-06-30
IPC分类号： H04L2549
CPC分类号： H04L25/4908
摘要： In a method for encoding payload bits for transmission over communications link, data and control information are assembled into n-bit data words, where n is an even number and words for control information are constrained to have zero disparity (equal numbers of binary zero and one digits). The n-bit data words are then encoded into n+2-bit code words by adding a two-bit label; for words carrying control information the label has a value of 10. For other data words the disparity is evaluated; if it is zero, the label bits are 01; if the disparity is non-zero and opposite in sense to the running digital sum of the code words transmitted already, the label bits are 11; otherwise, the data word is inverted, and the label bits are 00.
摘要翻译： 在用于通过通信链路传输的有效载荷比特的编码方法中，数据和控制信息被组合成n位数据字，其中n是偶数，并且用于控制信息的字被限制为具有零差异（相等数量的二进制零和 一位数）。 然后通过添加两位标签将n位数据字编码为n + 2位代码字; 对于带有控制信息的单词，标签的值为10.对于其他数据字，评估差异; 如果为零，则标签位为01; 如果视差对于已经传输的码字的运行数字和是非零的和相反的，则标签位为11; 数据字反转，标签位为00。
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公开(公告)号：US6064786A
公开(公告)日：2000-05-16
申请号：US945993
申请日：1997-11-06
IPC分类号： G02B6/42 , G02B6/14 , H04B10/2581 , G02B6/26 , G02F1/00
CPC分类号： H04B10/2581 , G02B6/14
摘要： A method and apparatus for increasing the operational bandwidth of a multimode optical fiber communications system is provided. The method comprises launching optical radiation into the core of the multimode fiber away from the center of the core so as to strongly excite mid order modes of the multimode fiber, but to only weakly excite low order and high order modes of the multimode fiber. The mid order modes excited are predominately within a small number of mode groups and thus have similar propagation constants. This leads to a reduction in modal dispersion and thus to a significant increase in bandwidth compared to an overfilled launch. The offset launch of the invention is tolerant both to the launch conditions and to any imperfections in the fiber refractive index profile. Modal noise performance is also enhanced. Embodiments of the invention employ a singlemode fiber, a multimode fiber or a lens to illuminate an end face of a multimode fiber with a small spot offset from the optical axis of the fiber.
摘要翻译： PCT No.PCT / GB97 / 00647 Sec。 371日期：1997年11月6日 102（e）日期1997年11月6日PCT 1997年3月10日PCT公布。 公开号WO97 / 33390 日期1997年9月12日提供了一种用于增加多模光纤通信系统的操作带宽的方法和装置。 该方法包括将光辐射从核心的中心向多模光纤的核心发射，以便强烈地激发多模光纤的中间阶模，但是只能弱激发多模光纤的低阶和高阶模。 激发的中级模式主要在少数模式组内，因此具有相似的传播常数。 这导致模式色散的降低，从而与过满的发射相比，带宽显着增加。 本发明的偏移发射对于发射条件和光纤折射率分布中的任何缺陷是宽容的。 模态噪声性能也得到提高。 本发明的实施例采用单模光纤，多模光纤或透镜来照射具有偏离光纤的光轴的小光点的多模光纤的端面。
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4.发明授权Fiber optic link, a transceiver for use in the link, and methods for designing and constructing fiber optic links and transceivers 有权光纤链路，用于链路的收发器以及用于设计和构建光纤链路和收发器的方法公开(公告)号：US07715669B2
公开(公告)日：2010-05-11
申请号：US11873550
申请日：2007-10-17
IPC分类号： G02B6/28
CPC分类号： H04B10/6971
摘要： A fiber optic link is provided that uses a relatively low-cost transceiver that incorporates relatively inexpensive low bandwidth optical and electrical components to achieve high data rate operations. The data rate of the fiber optic link can be greater than the data rate of the laser of the transceiver provided the laser meets certain noise requirements; in particular, the relative intensity noise (RIN) of the laser must be low enough to ensure low bit error rate (BER) operation of the link.
摘要翻译： 提供了一种光纤链路，其使用相对低成本的收发器，其包含相对便宜的低带宽光和电部件以实现高数据速率操作。 如果激光器满足某些噪声要求，则光纤链路的数据速率可以大于收发器激光器的数据速率; 特别地，激光器的相对强度噪声（RIN）必须足够低以确保链路的低误码率（BER）操作。
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5.发明申请FIBER OPTIC LINK, A TRANSCEIVER FOR USE IN THE LINK, AND METHODS FOR DESIGNING AND CONSTRUCTING FIBER OPTIC LINKS AND TRANSCEIVERS 有权光纤链路，链路中使用的收发器以及设计和构建光纤链路和收发器的方法公开(公告)号：US20090103927A1
公开(公告)日：2009-04-23
申请号：US11873550
申请日：2007-10-17
IPC分类号： H04B10/00
CPC分类号： H04B10/6971
摘要： A fiber optic link is provided that uses a relatively low-cost transceiver that incorporates relatively inexpensive low bandwidth optical and electrical components to achieve high data rate operations. The data rate of the fiber optic link can be greater than the data rate of the laser of the transceiver provided the laser meets certain noise requirements; in particular, the relative intensity noise (RIN) of the laser must be low enough to ensure low bit error rate (BER) operation of the link.
摘要翻译： 提供了一种光纤链路，其使用相对低成本的收发器，其包含相对便宜的低带宽光和电部件以实现高数据速率操作。 如果激光器满足某些噪声要求，则光纤链路的数据速率可以大于收发器激光器的数据速率; 特别地，激光器的相对强度噪声（RIN）必须足够低以确保链路的低误码率（BER）操作。
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公开(公告)号：US06304352B1
公开(公告)日：2001-10-16
申请号：US09076644
申请日：1998-05-12
IPC分类号： H04B1000
CPC分类号： H04B10/2581
摘要： A method and apparatus is provided for connecting an optical source to a multimode optical fibre in a multimode optical fibre communications system. A single mode fibre length is provided such that optical radiation admitted from an optical source at one end of the single mode fibre length is provided to a multimode optical fibre at the other end of the single mode fibre length. This method and apparatus is used in a duplex patchcord for connecting an optical transceiver to a pair of installed multimode fibres. The second fibre in the patchcord is a multimode fibre for passing optical signals to the optical receiver of the transceiver.
摘要翻译： 提供了一种用于在多模光纤通信系统中将光源连接到多模光纤的方法和装置。 提供单模光纤长度，使得在单模光纤长度的一端从光源允许的光辐射被提供给单模光纤长度另一端的多模光纤。 该方法和装置用于将光收发器连接到一对安装的多模光纤的双工跳线。 跳线中的第二个光纤是用于将光信号传送到收发器的光接收器的多模光纤。
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7.发明申请METHOD AND APPARATUS FOR PROVIDING A LINE OF SPOTS LAUNCH OF LIGHT INTO AN END OF A MULTIMODE OPTICAL FIBER 审中-公开用于提供一束光照射到多模光纤末端的方法和装置公开(公告)号：US20120251105A1
公开(公告)日：2012-10-04
申请号：US13516593
申请日：2010-03-19
CPC分类号： G02B6/4206 , G02B6/0288 , G02B6/14 , G02B6/421 , H04B10/2581
摘要： A method and an apparatus are provided for launching light into an entrance facet of a MMF of an optical MMF link in a way that excites one or more targeted higher-order mode groups in the MMF. The light is launched into the entrance facet of the MMF as a line of phase-modulated spots, referred to herein as a “line launch”. The line launch causes one or more targeted higher-order mode groups to be excited in the MMF. The use of the line launch to excite one or more higher-order mode groups in the MMF increases the bandwidth of the link and allows overall link lengths to be increased. In addition, the use of the line launch is reliable and robust despite defects in the MMF and despite connector offsets. Thus, the use of the line launch ensures that a sufficient increase in link bandwidth will be achieved despite the existence of defects in the MMF and even if there is some amount of optical misalignment due to the connector being offset relative to the corresponding receptacle.
摘要翻译： 提供了一种方法和装置，用于以激励MMF中的一个或多个目标高阶模式组的方式将光发射到光学MMF链路的MMF的入口面。 光线作为相位调制点的线发射到MMF的入射面，这里称为线路发射。 线路启动导致一个或多个有针对性的高阶模式组在MMF中激动。 使用线路发射来激励MMF中的一个或多个高阶模式组增加了链路的带宽，并允许增加整体链路长度。 此外，尽管MMF中存在缺陷，并且尽管连接器偏移，使用线路发射是可靠和稳定的。 因此，使用线路发射确保尽管存在MMF中的缺陷并且即使由于连接器相对于相应的插座而偏移而导致一定量的光学未对准，也将实现链路带宽的充分增加。
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