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公开(公告)号：US5923684A
公开(公告)日：1999-07-13
申请号：US975899
申请日：1997-09-09
CPC分类号： H01S3/094003 , H01S3/0675 , H01S3/094011 , H01S3/094096
摘要： An optical fiber amplifier is pumped by a fiber pump laser which has a pair of separate active media within a common resonator. The fiber gain section of the amplifier is also located within the resonator.
摘要翻译： 光纤放大器由纤维泵浦激光器泵浦，光纤泵浦激光器在公共谐振器内具有一对单独的有源介质。 放大器的光纤增益部分也位于谐振器内。
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公开(公告)号：US5659644A
公开(公告)日：1997-08-19
申请号：US659853
申请日：1996-06-07
申请人： David John DiGiovanni , Stephen Gregory Grubb , Daryl Inniss , Ralph Stephen Jameson , Kenneth Lee Walker
发明人： David John DiGiovanni , Stephen Gregory Grubb , Daryl Inniss , Ralph Stephen Jameson , Kenneth Lee Walker
CPC分类号： G02B6/4215 , H01S3/094003 , G02B6/14 , G02B6/29356 , G02B6/2937 , G02B6/4207 , H01S3/0675 , H01S3/094069
摘要： In an optical fiber light source a section of multimode fiber is interposed between an energizing laser (e.g,, a diode laser) and a single mode fiber active medium. In a preferred embodiment the single mode fiber active medium is surrounded by a multimode cladding coupled to the multimode fiber. The source may serve as a pump laser for a fiber amplifier or as an amplified spontaneous emission source. Arrangements for coupling several energizing lasers to the active medium are also described.
摘要翻译： 在光纤光源中，将多模光纤的一部分介于激光激光器（例如，二极管激光器）和单模光纤活性介质之间。 在优选实施例中，单模光纤有源介质由耦合到多模光纤的多模包层围绕。 源可以用作光纤放大器的泵浦激光器或者作为放大的自发发射源。 还描述了将几个激励激光器耦合到活性介质的布置。
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公开(公告)号：US5933438A
公开(公告)日：1999-08-03
申请号：US910948
申请日：1997-08-08
CPC分类号： H01S3/0675 , H01S3/094003 , H01S3/09408 , H01S3/2383
摘要： An optical fiber amplifier is pumped by a pair of pump lasers which have at least partially overlapping resonators. In one embodiment, the fiber gain section of the amplifier is located external to the resonators. In another embodiment, the coupler, which couples the pump lasers to the gain section, is located at least partially within said resonators. In a preferred embodiment the resonators are provided with polarization selection properties, and the outputs of the pump lasers are coherent.
摘要翻译： 光纤放大器由一对具有至少部分重叠的谐振器的泵激光器泵浦。 在一个实施例中，放大器的光纤增益部分位于谐振器的外部。 在另一个实施例中，将泵浦激光器耦合到增益部分的耦合器至少部分地位于所述谐振器内。 在优选实施例中，谐振器具有偏振选择特性，并且泵浦激光器的输出是相干的。
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公开(公告)号：US5959750A
公开(公告)日：1999-09-28
申请号：US659607
申请日：1996-06-06
申请人： Lars Erik Eskildsen , Stephen Gregory Grubb , Per Bang Hansen , Andrew John Stentz , Kenneth Lee Walker
发明人： Lars Erik Eskildsen , Stephen Gregory Grubb , Per Bang Hansen , Andrew John Stentz , Kenneth Lee Walker
CPC分类号： H04B10/2916 , H01S3/06754 , H01S3/302 , H04J14/02 , H04J14/08
摘要： An upgrade method in which Raman amplification is added to an existing transmission system to provide an increase in power budget and permit a substantial increase in transmission capacity either by time division multiplexing (TDM), wavelength division multiplexing (WDM), or a combination thereof. The power budget improvement permits higher transmission capacity by increasing either a single channel data rate and/or the number of wavelength division multiplexed data channels that can be accommodated by existing fiber links.
摘要翻译： 一种升级方法，其中将拉曼放大添加到现有传输系统以提供功率预算的增加，并且通过时分复用（TDM），波分复用（WDM）或其组合来允许传输容量的显着增加。 功率预算改进通过增加单个信道数据速率和/或可由现有光纤链路容纳的波分复用数据信道的数量来允许更高的传输容量。
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公开(公告)号：US5673280A
公开(公告)日：1997-09-30
申请号：US600354
申请日：1996-02-12
CPC分类号： H04B10/2916 , H01S3/302 , H01S2301/02 , H01S3/06787 , H01S3/094003 , Y10S372/703
摘要： A low noise optical fiber Raman amplifier (FRA) comprises an upstream and a downstream length of silica-based amplifier fiber, of combined length >200 m, typically >1 km, with an optical isolator disposed between the upstream and downstream lengths of amplifier fiber such that passage of backscattered signal radiation from the latter to the former is substantially blocked. In preferred embodiments counter-propagating pump radiation is coupled into the downstream length of amplifier fiber, and wavelength-selective means are provided for shunting the pump radiation around the optical isolator. The described FRA is advantageously incorporated into optical fiber communication systems. Exemplarily it can serve as power amplifier, as pre-amplifier, or as in-line amplifier. For instance, it can be used to replace conventional opto-electronic repeaters in existing 1.3 .mu.m fiber communication systems, or it can be used as power amplifier in a multi-subscriber optical fiber CATV system. In a still further exemplary embodiment, the FRA is used as a distributed pre-amplifier in a remotely pumped fiber communication system.
摘要翻译： 低噪声光纤拉曼放大器（FRA）包括上游和下游长度的二氧化硅基放大器光纤，其长度> 200m，通常> 1km，光隔离器设置在放大器光纤的上游和下游之间 使得后向散射信号辐射从后者到前者的通过基本上被阻挡。 在优选实施例中，反向传播的泵浦辐射被耦合到放大器光纤的下游长度中，并且提供波长选择装置用于在光隔离器周围分流泵浦辐射。 所描述的FRA有利地结合到光纤通信系统中。 例如，它可以作为功率放大器，作为前置放大器，或作为在线放大器。 例如，它可以用于替代现有的1.3μm光纤通信系统中的常规光电中继器，或者可以用作多用户光纤CATV系统中的功率放大器。 在又一示例性实施例中，FRA用作远程泵浦光纤通信系统中的分布式前置放大器。
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公开(公告)号：US5703978A
公开(公告)日：1997-12-30
申请号：US695180
申请日：1996-08-01
申请人： David John DiGiovanni , Justin Boyd Judkins , Janet Renee Pedrazzani , Ashish Madhukar Vengsarkar , Kenneth Lee Walker
发明人： David John DiGiovanni , Justin Boyd Judkins , Janet Renee Pedrazzani , Ashish Madhukar Vengsarkar , Kenneth Lee Walker
CPC分类号： G02B6/0219 , G02B6/02095 , H01S3/10023 , H01S2301/04 , H01S3/0675
摘要： Applicants have determined that the temperature sensitivity of long-period grating devices is due to differential variation with temperature of the refractive indices of the core and cladding. They have further determined that the cladding profile and fiber composition can be redesigned to substantially reduce this differential variation, thereby reducing the temperature sensitivity of long-period gratings of less than 4 nm per 100.degree. C. and preferably less than 2 nm per 100.degree. C. This design permits the use of long-period grating devices without temperature control or compensation.
摘要翻译： 申请人已经确定长周期光栅器件的温度敏感性是由于芯和包层的折射率的温度的差异变化。 他们进一步确定，可以重新设计包层分布和纤维组成以显着降低该差异变化，从而降低每100℃小于4nm，优选小于2nm / 100°的长周期光栅的温度敏感性。 C.此设计允许使用长周期光栅器件，无需温度控制或补偿。
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7.发明授权公开(公告)号：US06307988B1
公开(公告)日：2001-10-23
申请号：US09362151
申请日：1999-07-28
IPC分类号： G02B634
CPC分类号： H04B10/2519 , H04B2210/252
摘要： A high speed optical communication system (≧10 Gbit/s) is compensated for temperature variation by providing it with one or more automatic dispersion compensation modules. Each module has an adjustable dispersion element, a data integrity monitor and a feedback network whereby the monitor adjusts the dispersion element to compensate for temperature variation. In a preferred embodiment the dispersion compensating modules comprise chirped fiber Bragg gratings in which the chirp is induced in the grating by passing a current along distributed thin film heaters deposited along the length of the fiber. The magnitude of the applied current determines the dispersion of the grating. A data integrity monitor is configured to sense the integrity of transmitted data and to provide electrical feedback for controlling the current applied to the grating.
摘要翻译： 高速光通信系统（> = 10 Gbit / s）通过提供一个或多个自动色散补偿模块来补偿温度变化。 每个模块具有可调色散元件，数据完整性监视器和反馈网络，由此监视器调节色散元件以补偿温度变化。 在优选实施例中，色散补偿模块包括啁啾光纤布拉格光栅，其中通过沿沿着光纤长度沉积的分布式薄膜加热器传递电流而在光栅中感应啁啾。 施加电流的大小决定了光栅的色散。 数据完整性监视器被配置为感测传输数据的完整性，并提供用于控制施加到光栅的电流的电反馈。
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公开(公告)号：US6085016A
公开(公告)日：2000-07-04
申请号：US97549
申请日：1998-06-15
CPC分类号： G02B6/266
摘要： Magnets are used to control the amount of coupling loss between fibers. The fiber ends are attached to magnets and by controllably magnetizing the magnets, the fibers can be pulled apart or brought closer together to vary the amount of coupling loss. Preferably at least one of the magnets is latchable. The advantage of the latchable version is that a predetermined amount of loss can be latchably set by magnetizing the magnets to a particular level and afterwards no additional power is required to maintain the amount of attenuation. This is advantageous compared to other approaches in which power is required continuously to maintain a particular loss level.
摘要翻译： 磁铁用于控制纤维之间的耦合损耗。 光纤端部附着在磁体上，并通过可控制地磁化磁体，可以将光纤拉开或靠近在一起以改变耦合损耗。 优选地，至少一个磁体是可锁定的。 可锁定版本的优点是可以通过将磁体磁化到特定水平来锁定预定量的损耗，然后不需要额外的功率来保持衰减量。 与其中需要连续维持功率以维持特定损耗水平的其它方法相比，这是有利的。
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公开(公告)号：US5673342A
公开(公告)日：1997-09-30
申请号：US654499
申请日：1996-05-28
IPC分类号： G02B6/036 , G02B6/00 , G02B6/02 , G02B6/26 , G02B6/293 , G02B6/34 , G02B6/42 , H04B10/00 , H04B10/08 , H04B10/22 , H04B10/24
CPC分类号： G02B6/03627 , G02B6/02 , G02B6/266 , G02B6/03611 , G02B6/29368 , G02B6/4246
摘要： An optical fiber communication system according to the invention comprises an optical fiber filter that can be manufactured at low cost and that can be conveniently incorporated into the system, substantially like a conventional fiber jumper. The filter comprises a length L of axially uniform optical fiber selected to have substantially no loss (e.g., 20 dB) at a wavelength .lambda..sub.2. The length L will typically be less than 100 m. In one embodiment the optical fiber is a single mode optical fiber at .lambda..sub.1 (e.g., 1.3 .mu.m) that does not have a guided mode at .lambda..sub.2 (e.g., 1.55 .mu.m). In another embodiment the fiber contains a dopant that does substantially not absorb radiation of wavelength .lambda..sub.1, but substantially absorbs at .lambda..sub.2. In the second embodiment, .lambda..sub.1 can be greater than .lambda..sub.2. Fiber filters according to the invention can be advantageously used in a variety of communication systems, and exemplary systems are disclosed.
摘要翻译： 根据本发明的光纤通信系统包括可以以低成本制造并且可以方便地并入系统中的光纤滤波器，基本上像传统的光纤跳线一样。 滤波器包括长度为L的轴向均匀的光纤，其被选择为在波长λ1处基本上没有损耗（例如，<1dB），并且在波长λ2处具有相对高的损耗（例如，> 20dB）。 长度L通常将小于100米。 在一个实施例中，光纤是在λ1（例如，1.55μm）处不具有引导模式的λ1（例如，1.3μm）的单模光纤。 在另一个实施方案中，纤维包含基本上不吸收波长λ1的辐射但基本上以λ2吸收的掺杂剂。在第二实施方案中，λ1可以大于λ2.根据本发明的纤维过滤器可以有利地使用 在各种通信系统中，公开了示例性系统。
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10.发明授权Method of making a large MCVD single mode fiber preform by varying internal pressure to control preform straightness 失效通过改变内部压力来制造大型MCVD单模纤维预成型件以控制预成型件直线度的方法
公开(公告)号：US6105396A
公开(公告)日：2000-08-22
申请号：US115783
申请日：1998-07-14
申请人： Paul Francis Glodis , Charles Francis Gridley , Donald Paul Jablonowski , David Kalish , Kenneth Lee Walker
发明人： Paul Francis Glodis , Charles Francis Gridley , Donald Paul Jablonowski , David Kalish , Kenneth Lee Walker
IPC分类号： C03C3/04 , C03B37/012 , C03B37/018 , C03B37/027
CPC分类号： C03B37/01211 , C03B37/01869 , C03B37/01884 , C03B37/01892 , C03B2201/02 , C03B2201/04 , C03B2201/075 , C03B2203/24
摘要： A large optical preform 303 is made by a modified chemical vapor deposition (MCVD) process by depositing successive layers of core and cladding materials onto the inside surface of a rotating glass tube 33 having a hydroxyl ion (OH.sup.-) level that is less than 0.5 parts per million (ppm) by weight. The tube is then collapsed inwardly to form a core rod 301 in which the deposited core material 31 has a diameter that is greater than about 5 millimeters and the deposited cladding material 32 has an outside diameter that is less than about 15 millimeters. A machine-vision system 140, 150, 160 monitors and controls the diameter of the glass tube by regulating the pressure within the tube. Moreover, the machine-vision system monitors and controls the straightness of the tube by varying its rotational speed according to angular position. After the core rod 301 is formed, it is plasma etched to remove contaminants, and then overclad with two glass jackets 34, 35 having a hydroxyl ion (OH.sup.-) level that is less than 1.0 ppm by weight to create a large preform 303 from which about 400 kilometers of singlemode optical fiber can be drawn per meter of length.
摘要翻译： 通过改进的化学气相沉积（MCVD）工艺，通过将核心和包层材料的连续层沉积到具有小于0.5的羟基离子（OH-）水平的旋转玻璃管33的内表面上来制造大型光学预成型件303 百万分之几（ppm）（重量）。 管然后向内折叠以形成芯棒301，其中沉积的芯材料31具有大于约5毫米的直径，并且沉积的包层材料32具有小于约15毫米的外径。 机器视觉系统140,150,160通过调节管内的压力来监视和控制玻璃管的直径。 此外，机器视觉系统通过根据角度位置改变其转速来监测和控制管的平直度。 在形成芯棒301之后，将其等离子体蚀刻以除去污染物，然后用两个小于1.0重量ppm的羟基离子（OH-）水平的两个玻璃外套34,35包覆，以从 每米长度可以绘制约400公里的单模光纤。
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