公开(公告)号：US4793680A

公开(公告)日：1988-12-27

申请号：US52284

申请日：1987-05-21

Applicant: Kevin C. Byron

Inventor： Kevin C. Byron

IPC: G02B5/18 ,  G02B6/34

CPC classification number: G02B6/02066 ,  G02B5/1857 ,  G02B6/02123 ,  G02B6/29317 ,  G02B6/34 ,  Y10S359/90

Abstract: It has been found that when a pulsed high-power laser beam is incident on the surfaces of a wide variety of materials, ripples are produced on such surface. This is due to interference between scattered waves and the incident beam producing intensity fringes, and hence localized heating. The dimensions of the ripples are dependent on the wavelngth of the incident light. This is used to produce permanent (after cooling) gratings on the outer surface of an optical waveguide, for example an optical fibre, on to which a laser beam is focussed by a lens system. Hence a grating whose length is a few hundreds of micrometers is produced. If the cladding is removed this effect of ripple generation is enhanced.

Abstract translation: 已经发现，当脉冲大功率激光束入射到各种材料的表面上时，在这种表面上产生波纹。 这是由于散射波和入射光束之间的干涉产生强度条纹，因此是局部加热。 波纹的尺寸取决于入射光的波动。 这用于在光波导的外表面（例如光纤）上产生永久的（后冷却）光栅，激光束被透镜系统聚焦。 因此产生长度为几百微米的光栅。 如果去除了包层，则纹波产生的效果增强。

公开(公告)号：USD298621S

公开(公告)日：1988-11-22

申请号：US87234

申请日：1987-08-19

Applicant: Gordon Willis

Designer： Gordon Willis

公开(公告)号：US4748307A

公开(公告)日：1988-05-31

申请号：US858617

申请日：1986-05-01

Applicant: John G. Lamb

Inventor： John G. Lamb

IPC: C03B37/029 ,  C03C3/12 ,  H05B6/30

CPC classification number: C03B37/029 ,  C03C3/12 ,  C03B2205/64 ,  Y10T428/1314

Abstract: The evolution of particulate material from the inner surface of a tubular zirconia susceptor while fibre is drawn from preform is inhibited by providing that surface with a glassy finish by laser-beam fusion.

Abstract translation: 当纤维从预制件中拉出时，颗粒材料从管状氧化锆基座的内表面的演变通过激光束融合为该表面提供玻璃光洁度而被抑制。

公开(公告)号：US4737006A

公开(公告)日：1988-04-12

申请号：US862855

申请日：1986-05-13

Applicant: Kevin J. Warbrick

Inventor： Kevin J. Warbrick

IPC: G02B6/24 ,  G02B3/00 ,  G02B6/02 ,  G02B6/255 ,  G02B6/32 ,  G02B6/42 ,  G02B13/00 ,  C03B23/20 ,  G01N21/00

CPC classification number: G02B6/2551 ,  G02B13/0095 ,  G02B3/00 ,  G02B6/32 ,  G02B6/4203 ,  Y10S359/90

Abstract: A single mode fiber expanded beam termination is formed by fusion splicing an undoped (pure) silica rod to a single mode fiber. The length of the rod controls the expanded beam diameter, and forms a lens on the free end of the undoped silica rod to collimate an output beam.

Abstract translation: 通过将未掺杂（纯）二氧化硅棒熔接到单模光纤而形成单模光纤扩展光束终端。 杆的长度控制扩张的光束直径，并且在未掺杂的二氧化硅棒的自由端上形成透镜以准直输出光束。

公开(公告)号：US4736120A

公开(公告)日：1988-04-05

申请号：US679987

申请日：1984-12-10

Applicant: Basil B. Foster

Inventor： Basil B. Foster

IPC: H04B10/00 ,  H04B10/16 ,  H04L7/027 ,  H03B1/00 ,  H03K1/17

CPC classification number: H04B10/29 ,  H04L7/027

Abstract: A regenerator for an undersea optical transmission system has a timing extraction circuit for extracting the clock signal from an NRZ PCM signal. The circuit comprises a surface acoustic wave filter (F) which feeds an amplifier which comprises a number of similar cascaded amplifier sections provided by an integrated circuit. The first stage is a grounded base stage (stage 1) and the following sections each include a balanced emitter-follower buffer stage (stage 2) and a balanced long-tailed pair stage (stage 3). Any base and emitter voltages in an amplifier section are minimised if not eliminated by the long-tailed pair having equal emitter and collector loads.

Abstract translation: 用于海底光传输系统的再生器具有用于从NRZ PCM信号提取时钟信号的定时提取电路。 该电路包括一个声表面波滤波器（F），该滤波器馈送一个放大器，该放大器包括多个由集成电路提供的类似的级联放大器部分。 第一阶段是接地基阶段（阶段1），以下部分各自包括平衡的发射极跟随缓冲器级（阶段2）和平衡的长尾对级（阶段3）。 放大器部分中的任何基极和发射极电压如果没有被具有相等发射极和集电极负载的长尾对消除，则最小化。

公开(公告)号：US4732447A

公开(公告)日：1988-03-22

申请号：US842105

申请日：1986-03-20

Applicant: Stephen Wright ,  Anthony W. Davis

Inventor： Stephen Wright ,  Anthony W. Davis

IPC: H04B10/00 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/148 ,  H04B10/152 ,  G02B6/28

CPC classification number: H04B10/61 ,  H04B10/612 ,  H04B10/63

Abstract: A receiver for modulated optical signals including a multiport optical fibre coupler arrangement (10) to one input port of which the modulated optical signals are applied and to another input port of which a local oscillator optical signal of substantially the same optical frequency as the modulated optical signal is applied whereby the output ports of the coupler give separate output signals that are differentially related to the optical frequency phase difference between the modulated input signal and the local oscillator signal, means for individually demodulating (12a-12c) the output signals and means for summing the demodulated output signals.

Abstract translation: 一种用于调制光信号的接收机，包括多端口光纤耦合器装置（10）到被调制的光信号的一个输入端口，并且其另一个输入端口具有与调制光学器件基本相同的光频率的本地振荡器光信号 施加信号，由此耦合器的输出端口给出与调制输入信号和本地振荡器信号之间的光频率相位差有差异的分离的输出信号，用于单独解调（12a-12c）输出信号的装置和用于 解调后的输出信号相加。

公开(公告)号：US4716563A

公开(公告)日：1987-12-29

申请号：US865213

申请日：1986-05-19

Applicant: Robert C. Roust

Inventor： Robert C. Roust

IPC: H04J9/00 ,  H04B17/00 ,  H04L25/24 ,  H04J3/12 ,  H04B1/16

CPC classification number: H04L25/242 ,  H04B17/0087

Abstract: An arrangement for the demodulation of auxiliary low frequency channels in digital transmission systems comprising means (12) for receiving the transmitted signals, linear amplification means (13) with automatic gain control (AGC) (14) for the received signals, non linear discrimination means (15) for discriminating between logic levels in the amplified digital signals at the main channel bit rate, and subtraction means (16) for subtracting the output of the discrimination means from the amplified signals to obtain the auxiliary low frequency channel signals.

Abstract translation: 一种用于在数字传输系统中解调辅助低频信道的装置，包括用于接收发射信号的装置（12），具有用于接收信号的自动增益控制（AGC）（14）的线性放大装置（13）），非线性鉴别装置 （15），用于以主信道比特率鉴别放大数字信号中的逻辑电平;以及减法装置（16），用于从放大信号中减去鉴别装置的输出，以获得辅助低频信道信号。

公开(公告)号：US4696060A

公开(公告)日：1987-09-22

申请号：US783570

申请日：1985-10-03

Applicant: Thomas Oswald

Inventor： Thomas Oswald

IPC: H04B10/16 ,  H04B1/74 ,  H04B10/00 ,  H04B10/17 ,  H04B9/00 ,  H04L1/22

CPC classification number: H04B10/032 ,  H04B1/74

Abstract: In an optical transmission system, particularly a submerged system, a line finding system is provided which, in the event of a fault somewhere along the system, enables the remaining operative lines or paths to take over the traffic and thus "steer around" the fault. The laser sources of the submerged repeaters and switched by electrical selection at their input using failed clock or a supervisory signal to achieve the switching.

Abstract translation: 在光传输系统中，特别是淹没系统中，提供了一种寻线系统，其在系统某处存在故障的情况下，使得剩余的操作线或路径能够接管交通，从而“转向”故障 。 浸没式中继器的激光源，并通过使用故障时钟或监控信号的电气选择切换，以实现切换。

公开(公告)号：US4670815A

公开(公告)日：1987-06-02

申请号：US892801

申请日：1986-08-01

Applicant: John H. Alexander ,  Dawn A. Jackson

Inventor： John H. Alexander ,  Dawn A. Jackson

IPC: C04B35/00 ,  C04B35/497 ,  H01B3/12 ,  H01G4/12 ,  C04B35/46 ,  H01G7/00

CPC classification number: C04B35/497 ,  H01G4/1254

Abstract: A dielectric composition including a ternary system comprising non-stoichiometric lead magnesium niobate, non-stoichiometric lead zinc niobate and non-stoichiometric lead iron niobate, and a small amount of one or more oxide additives which serves to reduce the tan .delta. value in comparison with the ternary system alone. The one or more additives may be chosen from the group consisting of nickel oxide, stoichiometric lead nickel niobate, ceric oxide, lead oxide, zirconium oxide, silver oxide, manganese dioxide, lanthanum oxide and cobalt oxide. Compositions with firing temperatures in the range 950.degree. to 1100.degree. C. have dielectric constants in the range 10700 to 16600 (at 20.degree. C.) making the composition particularly useful for high silver content multilayer ceramic capacitors.

Abstract translation: 包含非化学计量的铌酸铅镁，非化学计量的铅锌铌酸盐和非化学计量的铅铌酸铅的三元体系的电介质组合物和少量一种或多种氧化物添加剂，其用于将tanδ值与 三元系统单独。 一种或多种添加剂可以选自氧化镍，化学计量的铌酸铅，氧化铈，氧化铅，氧化锆，氧化银，二氧化锰，氧化镧和氧化钴。 烧成温度在950℃至1100℃范围内的组成物的介电常数范围为10700至16600（在20℃），使组合物对于高含量的多层陶瓷电容器尤其有用。

公开(公告)号：US4659998A

公开(公告)日：1987-04-21

申请号：US730562

申请日：1985-05-06

Applicant: George H. S. Rokos

Inventor： George H. S. Rokos

IPC: H03F1/30 ,  H03F3/34 ,  H03F3/347 ,  H03F3/50 ,  H03F3/45 ,  H03F1/26

CPC classification number: H03F3/50 ,  H03F1/302

Abstract: For a voltage follower unity gain amplifier, used, for instance, as a buffer in a transceiver associated with a data bus, the input signal is fed forward to a comparator (T2-T3) to which the output is also applied. The input is also applied via an amplifier stage (T5-T6) to a transistor (T4) in the commoned circuit of the comparator, which is a long-tailed pair. Thus, with a connection from the output of the circuit which includes another transistor (T9), provides negative feedback round the comparator, gives a highly stable current.

Abstract translation: 对于例如用作与数据总线相关联的收发器中的缓冲器的电压跟随器单位增益放大器，输入信号被馈送到也被施加输出的比较器（T2-T3）。 输入也通过放大器级（T5-T6）施加到比较器的公共电路中的晶体管（T4），该比较器是长尾对。 因此，通过来自包括另一晶体管（T9）的电路的输出的连接，在比较器周围提供负反馈，给出高度稳定的电流。