公开(公告)号：US4283213A

公开(公告)日：1981-08-11

申请号：US86856

申请日：1979-10-22

申请人： Francis I. Akers ,  Mokhtar S. Maklad

发明人： Francis I. Akers ,  Mokhtar S. Maklad

IPC分类号： C03B37/012 ,  C03B37/027 ,  C03C13/04 ,  C03C25/10 ,  C03C25/02

CPC分类号： C03C13/04 ,  C03B37/01211 ,  C03B37/027 ,  C03C25/107 ,  C03B2203/24

摘要： A method for fabricating a fiber with optical cores of diameters between 2 to 20 microns is depicted. A first step includes the fabrication of a step-index preform of predetermined dimensions. The preform is drawn into a conventional fiber by conventional techniques resulting in a fiber having an outer diameter of about 120 microns or larger. The fiber is then emplaced in a glass tube. The tube is collapsed on the fiber by heating the same resulting in a second preform. This preform is again drawn into a fiber by conventional techniques to obtain a final fiber having core dimensions indicative of single mode operation with compatible outer diameters.

摘要翻译： 描述了一种制造具有2至20微米直径的光纤芯的光纤的方法。 第一步包括制造具有预定尺寸的步进折射率预成型件。 通过常规技术将预成型件拉制成常规纤维，得到外径为约120微米或更大的纤维。 然后将纤维放置在玻璃管中。 管通过加热而在纤维上折叠，导致第二预制件。 通过常规技术将该预型件再次拉入纤维中，以获得具有指示具有相容外径的单模操作的芯尺寸的最终纤维。

公开(公告)号：US4354736A

公开(公告)日：1982-10-19

申请号：US160698

申请日：1980-06-18

申请人： Mokhtar S. Maklad ,  Francis I. Akers ,  William L. Thomas

发明人： Mokhtar S. Maklad ,  Francis I. Akers ,  William L. Thomas

IPC分类号： C03B37/012 ,  C03B37/027 ,  G02B6/10 ,  G02B5/172

CPC分类号： C03B37/02709 ,  C03B37/01217 ,  C03B37/01225 ,  C03B37/02781 ,  G02B6/105 ,  C03B2203/02 ,  C03B2203/14 ,  C03B2203/30

摘要： The stress-induced birefringent single mode optical fiber includes an optical core having a high refractive index and a high thermal expansion coefficient. An arrangement formed from an optical material having a low refractive index and a low thermal expansion coefficient is disposed to engage the outer surface of the core tangentially at opposite ends of a diameter of the core to establish a stress therein. Air encompasses the remainder of the outer surface of the core to provide a light guiding cladding for the core and, hence, the fiber itself. The arrangement to establish the stress may include a pair of flat plates engaging the outer surface of the core tangentially which are entrapped in a circular tube which is concentric with the core such that air is entrapped between the plates and the circular tube to provide the light guiding cladding. Alternatively, an elliptical tube is provided to engage the outer surface of the core at the minor axis of the elliptical tube to provide the desired stress in the fiber. In this case air is enclosed in the elliptical tube to provide the light guiding cladding.

摘要翻译： 应力诱导双折射单模光纤包括具有高折射率和高热膨胀系数的光纤芯。 由具有低折射率和低热膨胀系数的光学材料形成的布置被设置成在芯的直径的相对端处切向地接合芯的外表面以在其中形成应力。 空气包围芯的外表面的其余部分以为芯提供导光包层，并且因此提供纤维本身。 用于确定应力的布置可以包括一对平板，其切向地与芯的外表面接合，这些平板被截留在与芯同心的圆形管中，使得空气被夹在板和圆管之间以提供光 引导包层 或者，提供椭圆管以在椭圆管的短轴处接合芯的外表面以在纤维中提供期望的应力。 在这种情况下，空气被封闭在椭圆管中以提供导​​光包层。

公开(公告)号：US6141330A

公开(公告)日：2000-10-31

申请号：US717475

申请日：1996-09-20

申请人： Francis I. Akers

发明人： Francis I. Akers

IPC分类号： H04L12/28 ,  H04Q11/04 ,  H04L12/16

CPC分类号： H04L12/2854 ,  H04Q11/0442 ,  H04Q11/0471 ,  H04Q2213/13003 ,  H04Q2213/1308 ,  H04Q2213/13082 ,  H04Q2213/13106 ,  H04Q2213/13166 ,  H04Q2213/13202 ,  H04Q2213/13209 ,  H04Q2213/13292 ,  H04Q2213/1332 ,  H04Q2213/13322

摘要： High-speed digital transmission can be achieved with existing phone lines and HDSL chipsets while retaining plain old telephone service (POTS) with full failsafe capability. Two original ISDN signals [4,5] at a rate of 160 kbps and one POTS channel [10] digitized at 64 kbps are multiplexed by a MIPCS card [6] of a signal provider [1]. The resulting digital signal is transported over a twisted cable pair [2] which has an approximate maximum length of 16 kft based on the current technology. At a receiving end, the signal is demultiplexed and regenerated by a subscriber's MIPCS card [7]. The subscriber's MIPCS card is line-powered via the cable [2] to avoid dependence upon local power. The regenerated signals are transmitted over one POTS line [42] and two ISDN cables [8,9] to remote premises. Both MIPCS cards have bypass relays for the POTS lines to ensure the subscriber's POTS access in the event of a local power outage or electronic failure.

摘要翻译： 可以通过现有的电话线路和HDSL芯片组实现高速数字传输，同时保留具有完全故障保护能力的普通老式电话服务（POTS）。 以信号提供商[1]的MIPCS卡[6]复用两个原始ISDN信号[4,5]，速率为160kbps，一个以64kbps数字化的POTS信道[10]被复用。 所得到的数字信号通过基于当前技术的近似最大长度为16kft的双绞线对[2]传送。 在接收端，信号由用户的MIPCS卡解复用并再生[7]。 订户的MIPCS卡通过电缆线路供电[2]，以避免对本地电源的依赖。 再生信号通过一条POTS线路[42]和两条ISDN电缆[8,9]传输到远程处所。 两个MIPCS卡都有用于POTS线路的旁路继电器，以确保在局部停电或电子故障的情况下用户的POTS访问。

公开(公告)号：US4682850A

公开(公告)日：1987-07-28

申请号：US624080

申请日：1984-06-25

申请人： John S. White ,  A. Dahlgren Vaughan ,  Francis I. Akers

发明人： John S. White ,  A. Dahlgren Vaughan ,  Francis I. Akers

IPC分类号： C03C25/10 ,  G02B6/44

CPC分类号： G02B6/443 ,  C03C25/106

摘要： An optical fiber coated with a single ultraviolet cured resin wherein the attenuation losses are less than 0.5 decibels/kilometer. The resin has a tensile modulus of about 7,800 psi. This cable is particularly useful in loosely wrapped cable structures such as open channel or loose tube cables.

摘要翻译： 涂覆有单一紫外线固化树脂的光纤，其中衰减损耗小于0.5分贝/公里。 树脂的拉伸模量为约7800psi。 这种电缆在松动缠绕的电缆结构中是特别有用的，例如开放通道或松套管电缆。

公开(公告)号：US4597785A

公开(公告)日：1986-07-01

申请号：US636525

申请日：1984-08-01

申请人： Kamran Karbassiyoon ,  Francis I. Akers ,  Larry J. Raplee ,  Daniel G. Fletcher

发明人： Kamran Karbassiyoon ,  Francis I. Akers ,  Larry J. Raplee ,  Daniel G. Fletcher

IPC分类号： C03B37/018 ,  C03B37/012 ,  C03B37/07

CPC分类号： C03B37/01869 ,  C03B37/01853

摘要： An arrangement for collapsing tubular formations into optical preforms includes a control arrangement which controls the ratio of hydrogen to oxygen in an oxyhydrogen burner flame during the collapsing operation toward overabundance of hydrogen when it is desired to increase the degree of evaporation of glass from the outer surface of a tubular proportion being collapsed. This arrangement is used for bringing the ratio of the cross-sectional area of the core region to that of the cladding region in an optical preform resulting from the collapse into or close to a predetermined range, regardless of the initial value of this ratio in the original tubular formation, by evaporating more or less of the glass from the outside of the tubular formation during the collapse.

摘要翻译： 用于将管状结构折叠成光学预成型件的布置包括控制装置，其控制在氢化氢燃烧器火焰期间的氢气与氧气在塌缩操作期间对于过度氢气的比例，当期望增加玻璃从外表面蒸发的程度时 的管状部分被塌缩。 这种布置用于使光纤预制件中的芯部区域的横截面积与包层区域的截面面积的比例从塌陷到或接近预定范围，而不管该比例的初始值如何 通过在塌陷期间从管状结构的外部蒸发更多或更少的玻璃而形成原始的管状结构。

公开(公告)号：US06967952B1

公开(公告)日：2005-11-22

申请号：US09775936

申请日：2001-02-01

申请人： Francis I. Akers ,  Daniel W. Agar ,  Frederick J. Brandt

发明人： Francis I. Akers ,  Daniel W. Agar ,  Frederick J. Brandt

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04M11/06

CPC分类号： H04L12/5601 ,  H04L2012/5665 ,  H04M11/062

摘要： Method and apparatus for providing a long loop broadband service which allows data from different ADSL users to be shared and transported across a group (possibly a group of one) of line-powered, repeatered copper pairs utilizing a symmetric transmission approach is disclosed. Multiple ADSL users are able to share the bandwidth on pair(s) between the Remote Terminal Unit and Central Termination Unit by converting the ADSL data into ATM cells that are properly addressed and sent over the pair(s). Straight-Through Repeaters can be used in between the Central Termination Unit and the Remote Termination Unit on each of the pairs to extend the reach of the system. In this manner, the reach of ADSL (or other) internet access can be increased from its present 15 to 18 kft limitation to over 40,000 feet using 26 gauge wire, effectively reaching over 99% of subscribers.

公开(公告)号：US5883941A

公开(公告)日：1999-03-16

申请号：US747068

申请日：1996-11-08

申请人： Francis I. Akers

发明人： Francis I. Akers

IPC分类号： H04M11/06 ,  H04Q11/04 ,  H04M11/00 ,  H04J3/12

CPC分类号： H04Q11/0435 ,  H04M11/062 ,  H04Q2213/13003 ,  H04Q2213/13034 ,  H04Q2213/1308 ,  H04Q2213/13106 ,  H04Q2213/13166 ,  H04Q2213/13174 ,  H04Q2213/13199 ,  H04Q2213/13209 ,  H04Q2213/13216 ,  H04Q2213/13292 ,  H04Q2213/13296 ,  H04Q2213/13332 ,  H04Q2213/13389

摘要： High-speed digital transmission can be achieved with existing phone lines and HDSL chipsets while retaining plain old telephone service (POTS) with full failsafe capability. One original digital data signal �4! at a rate of at least 352 kbps and typical 384 kbps and one POTS channel �10! digitized at 64 kbps are multiplexed by a HPCS card �6! of a signal provider �1!. The resulting digital signal is transported over a twisted based on the current technology. At a receiving end, the signal is demultiplexed and regenerated by a subscriber's HPCS card �7!. The subscriber's HPCS card is line-powered via the cable �2! to avoid dependence upon local power. The regenerated signals are transmitted over one POTS line �42! and one data line �8! to or within a remote premise. Both HPCS cards have bypass relays for the POTS line to ensure the subscriber's POTS access in the event of a local power outage or electronic failure.

摘要翻译： 可以通过现有的电话线路和HDSL芯片组实现高速数字传输，同时保留具有完全故障保护能力的普通老式电话服务（POTS）。 以信号提供者[1]的HPCS卡[6]复用以至少352kbps的速率和典型的384kbps的速率的一个原始数字数据信号[4]和以64kbps数字化的一个POTS信道[10]。 所得到的数字信号基于当前技术通过扭转传输。 在接收端，信号被用户的HPCS卡解复用并再生[7]。 用户的HPCS卡通过电缆[2]线路供电，以避免对本地电源的依赖。 再生的信号通过一个POTS线路[42]和一个数据线路[8]发送到远程内部或其内部。 两个HPCS卡都有用于POTS线路的旁路继电器，以确保在局部停电或电子故障的情况下用户的POTS访问。

公开(公告)号：US4632684A

公开(公告)日：1986-12-30

申请号：US636210

申请日：1984-07-31

申请人： Kamran Karbassiyoon ,  Philip E. Foster ,  Francis I. Akers ,  Daniel G. Fletcher

发明人： Kamran Karbassiyoon ,  Philip E. Foster ,  Francis I. Akers ,  Daniel G. Fletcher

IPC分类号： C03B37/018 ,  C03B37/012 ,  C03B37/07

CPC分类号： C03B37/01869

摘要： An arrangement for collapsing tubular formations into optical preforms includes a control arrangement which controls the pressure build-up at the downstream end of the tubular formation during all of but the last one of the collapsing increments to control the flow of a gaseous medium through the interior of the tubular formation from an upstream end to and beyond the downstream end of the tubular formation. The magnitude of the back-up pressure is controlled by a set point controller in dependence on the actual value of the back-up pressure, the set point controller being operative for counteracting any deviation from the desired pressure. The set point controller controls the flow-through cross-section of a control valve that admits a pressurized inert gas to a region situated downstream of the downstream end of the tubular formation and also downstream of the point at which the pressure build-up is being measured.

摘要翻译： 用于将管状结构塌缩成光学预成型件的布置包括控制装置，其控制在所有但最后一个塌缩增量期间的管状地层的下游端处的压力积聚，以控制气态介质通过内部的流动 从管状结构的上游端到下游端的管状结构。 备用压力的大小根据设定点控制器根据备用压力的实际值来控制，设定点控制器用于抵消与期望压力的任何偏差。 设定点控制器控制控制阀的流通截面，该控制阀将加压的惰性气体接纳到位于管状地层下游端下游的区域，并且还压力增加点的下游 测量。

公开(公告)号：US06282204B1

公开(公告)日：2001-08-28

申请号：US08995244

申请日：1997-12-19

申请人： Nicholas A. Balatoni ,  Francis I. Akers

发明人： Nicholas A. Balatoni ,  Francis I. Akers

IPC分类号： H04L1256

CPC分类号： H04Q11/0442 ,  H04Q2213/13034 ,  H04Q2213/13039 ,  H04Q2213/13106 ,  H04Q2213/13174 ,  H04Q2213/13176 ,  H04Q2213/13202 ,  H04Q2213/13209 ,  H04Q2213/13214 ,  H04Q2213/13215 ,  H04Q2213/13216 ,  H04Q2213/13292 ,  H04Q2213/13305 ,  H04Q2213/1332 ,  H04Q2213/13322 ,  H04Q2213/1336

摘要： A method and related apparatus for concurrent transmission and reception of at least one analog voice telephone signal and at least one ISDN service signal between a first location and a second location over a single twisted pair using a digitally encoded signal that is selected from the group consisting of 2B1Q and 4B3T signals. The method further includes the steps of sending line power over the single twisted pair, transferring the digitally encoded signal to the second location over the single twisted pair, and detecting non-operation of the digitally encoded signal between the first location and the second location to thereby impose a bypass lifeline and provide the analog telephone signal at the second location over the single twisted pair. The method also includes the step of providing the ISDN signal and the analog telephone signal at the second location over the single twisted pair when the non-operation is not detected. The present method and apparatus can provide at least a 2-to-1 pair gain by multiplexing signals representing the analog voice telephone signal and ISDN service signal, in a specific embodiment.

摘要翻译： 一种方法和相关装置，用于使用从以下组中选择的数字编码信号在单个双绞线上在第一位置和第二位置之间并发发送和接收至少一个模拟语音电话信号和至少一个ISDN服务信号： 的2B1Q和4B3T信号。 该方法还包括以下步骤：通过单个双绞线发送线路电力，通过单个双绞线将数字编码信号传输到第二位置，以及检测第一位置与第二位置之间的数字编码信号的非操作，以 从而施加旁路生命线，并通过单个双绞线在第二位置提供模拟电话信号。 该方法还包括当未检测到非操作时，在单个双绞线上的第二位置处提供ISDN信号和模拟电话信号的步骤。 在具体实施例中，本方法和装置可以通过复用表示模拟语音电话信号和ISDN服务信号的信号来提供至少2对1对增益。

公开(公告)号：US6118766A

公开(公告)日：2000-09-12

申请号：US701813

申请日：1996-08-21

申请人： Francis I. Akers

发明人： Francis I. Akers

IPC分类号： H04M11/06 ,  H04Q11/04 ,  H04J3/00

CPC分类号： H04Q11/0428 ,  H04M11/06 ,  H04Q2213/13003 ,  H04Q2213/13034 ,  H04Q2213/1308 ,  H04Q2213/13094 ,  H04Q2213/13106 ,  H04Q2213/13199 ,  H04Q2213/13202 ,  H04Q2213/13209 ,  H04Q2213/13292 ,  H04Q2213/13298 ,  H04Q2213/13322 ,  H04Q2213/13332 ,  H04Q2213/13389

摘要： High-speed digital transmission can be achieved with existing phone lines and HDSL chipsets. Two original ISDN signals [4,5] at a rate of 160 kbps are multiplexed by a MICS card [6] of a signal provider [1]. The resulting digital signal is transported over a twisted cable pair [2] which has an approximate maximum length of 16 kft. At a receiving end, the signal is demultiplexed and regenerated by a subscriber's MICS card [7]. The subscriber's MICS card is line-powered via the cable [2] to avoid dependence upon local power. The regenerated signals are transmitted over two ISDN cables to remote premises which can be as far as 18 kft away.

摘要翻译： 可以通过现有的电话线和HDSL芯片组实现高速数字传输。 信号提供商[1]的MICS卡[6]将两个原始ISDN信号[4,5]以160 kbps的速率复用。 所产生的数字信号通过双绞电缆对[2]传输，其长度约为16kft。 在接收端，信号由用户的MICS卡解复用和再生[7]。 用户的MICS卡通过电缆[2]线路供电，以避免依赖于本地电源。 再生的信号通过两条ISDN电缆传输到远达18kft的远程处所。