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51. 发明授权

US5329210A High-speed driver for an LED communication system or the like 失效
标题翻译：用于LED通信系统的高速驱动器等
公开(公告)号：US5329210A
公开(公告)日：1994-07-12
申请号：US791828
申请日：1991-11-13
申请人： Lisa A. Peterson , Stefan A. Siegel
发明人： Lisa A. Peterson , Stefan A. Siegel
IPC分类号： H01L33/00 , H03K17/0412 , H04B10/155 , H05B41/16
CPC分类号： H03K17/04126 , H04B10/502 , Y10S362/80
摘要： A high-speed driver for LED data communications systems. A differentiator provides a turn-on and a turn-off pulse of current to the LED. The amount of charge delivered during turn-off is adjusted to sweep substantially all of the carriers from the LED without reverse-biasing the LED.
摘要翻译：用于LED数据通信系统的高速驱动器。微分器向LED提供电流的导通和关断脉冲。调节关闭期间传送的电荷量，以便基本上扫描来自LED的所有载波，而不会反向偏置LED。

52. 发明授权

US5293263A Electro-optical modulator which provides optical bias stabilization during operation 失效
标题翻译：在操作过程中提供光学偏置稳定的电光调制器
公开(公告)号：US5293263A
公开(公告)日：1994-03-08
申请号：US860866
申请日：1992-03-31
申请人： Alexander C. De Rijck
发明人： Alexander C. De Rijck
IPC分类号： H04B10/155 , H04B10/04 , H04B10/06
CPC分类号： H04B10/503 , H04B10/504 , H04B10/564
摘要： An optical transmitter comprising a control loop for stabilizing the bias current which sets a bias level of the amount of light emitted by a laser diode 6. A cascade circuit 5 which includes the laser diode 6, a photodiode 7 and a variable gain control amplifier 8 is connected in the negative feedback path of the control loop. To prevent amplitude modulation of the bias current when a modulation signal occurs at the input of the gain control amplifier, the control loop produces a cancelling signal of a magnitude which cancels the mean value of such modulation signal. The cancelling signal is derived from the modulation signal in a fixed manner, by fixing the transfer factor of the negative feedback path as measured by transmission of an auxiliary signal through such path and adjusting the gain of amplifier 8 in accordance with the result of such measurements.
摘要翻译：一种光发射机，包括用于稳定偏置电流的控制回路，该偏置电流设置由激光二极管6发射的光量的偏置电平。包括激光二极管6，光电二极管7和可变增益控制放大器8的级联电路5 连接在控制回路的负反馈路径中。为了防止调制信号在增益控制放大器的输入端发生时偏置电流的幅度调制，控制环路产生消除这种调制信号的平均值的幅度的消除信号。消除信号以固定的方式从调制信号导出，通过固定通过这种路径传输辅助信号所测量的负反馈路径的传送因子，并根据这种测量结果调整放大器8的增益。

53. 发明授权

US5220578A Long term mode stabilization for distributed Bragg reflector laser 失效
标题翻译：用于分布式BRAGG反射器激光器的长期模式稳定
公开(公告)号：US5220578A
公开(公告)日：1993-06-15
申请号：US786480
申请日：1991-11-01
申请人： Thomas L. Koch , Sheryl L. Woodward
发明人： Thomas L. Koch , Sheryl L. Woodward
IPC分类号： H01S5/042 , H01S5/026 , H01S5/0625 , H01S5/068 , H01S5/0687 , H04B10/155
CPC分类号： H01S5/0687 , H04B10/503 , H04B10/572 , H01S5/0264 , H01S5/06256
摘要： A light transmitter comprising a distributed Bragg reflector laser and mode stabilization feedback means is described for maintaining the laser in single longitudinal mode operation.

54. 发明授权

US5173899A TDMA communications network of transmitting information between a central station and remote stations 失效
标题翻译：中远站和远程站之间传输信息的TDMA通信网络
公开(公告)号：US5173899A
公开(公告)日：1992-12-22
申请号：US488047
申请日：1990-05-21
申请人： John W. Ballance
发明人： John W. Ballance
IPC分类号： H04B10/20 , H04B7/24 , H04B10/00 , H04B10/08 , H04B10/155 , H04B10/207 , H04J3/06 , H04J14/00 , H04J14/08 , H04L7/00 , H04L12/28 , H04L25/03 , H04L25/49 , H04M3/00 , H04M11/00
CPC分类号： H04J3/0682 , H04B10/272 , H04B10/50 , H04J14/08 , H04J3/0605 , H04L25/03866
摘要： A passive, all optical communications network is provided in which a single optical source in a central station serves many outstations (e.g. telephones in customers' premises). Time division multiplexed optical signals from a laser source are transmitted along a single optical fibre from a central station. The signal is split between several secondary fibers at a first splitter (e.g. array of passive couplers) and between further sets of fibres at a second set of splitters. At this stage there are 120 individual fibres to customers' premises. Digital speech or data is sent back to the central station by a laser in the customers' premises operating in a low duty-cycle mode. The 120 data streams are interleaved at the branching points.

55. 发明授权

US5105446A Digital method of correcting non-linearity in a transmission chain, and apparatus implementing the method 失效
标题翻译：校正传输链中非线性的数字方法和实现方法的装置
公开(公告)号：US5105446A
公开(公告)日：1992-04-14
申请号：US593159
申请日：1990-10-05
申请人： Robert Ravoalavoson , Guy Allemand
发明人： Robert Ravoalavoson , Guy Allemand
IPC分类号： H03C3/08 , H03F1/32 , H04B1/62 , H04B10/155 , H04L27/36
CPC分类号： H04B10/50 , H03C3/08 , H03F1/3258 , H04B1/62 , H04L27/367
摘要： The invention provide a digital method of correcting non-linearity in a transmission chain, in which the effects of amplifier non-linearities are compensated by applying predistortion in baseband prior to modulation, with the signal being processed digitally in real time. The invention also provides apparatus for implementing the method. The invention is particularly applicable to radio beams for conveying digital signals.
摘要翻译：本发明提供了一种校正传输链中的非线性的数字方法，其中通过在调制之前在基带中应用预失真来补偿放大器非线性的影响，同时信号被实时数字化处理。本发明还提供了实现该方法的装置。本发明特别适用于传送数字信号的无线电波束。

56. 发明授权

US5069522A Optical fiber link card 失效
标题翻译：光纤链路卡
公开(公告)号：US5069522A
公开(公告)日：1991-12-03
申请号：US672193
申请日：1991-03-19
申请人： Timothy R. Block , Marcia B. Ebler , Ladd W. Freitag , Gerald M. Heiling , Spencer C. Holter , Dennis L. Karst , David W. Siljenberg , Ronald L. Soderstrom , John T. Trnka
发明人： Timothy R. Block , Marcia B. Ebler , Ladd W. Freitag , Gerald M. Heiling , Spencer C. Holter , Dennis L. Karst , David W. Siljenberg , Ronald L. Soderstrom , John T. Trnka
IPC分类号： G02B6/38 , H04B10/155
CPC分类号： G02B6/4292 , H04B10/50 , G02B6/4246
摘要： An optical fiber link card communication module, and process for fabricating the module, where the module provides a parallel electrical interface to the user, facilitates high speed serial transmission of data over an optical data link, and contains a plurality of converters for performing conversions between both electrical and optical signals. A preferred embodiment of the invention contemplates fabricating the optical communication module on a single multilayer card with all the transmitter electrical components being located on one side of the card, all receiver electrical components being located on the other side of the card, and the transmitter and receiver components being separated by shielding layers in the card. By using two transmitter/receiver pairs (with the transmitters and receivers being located on respective sides of the card) an embodiment of the invention provides for double full duplex communications.
摘要翻译：光纤链路卡通信模块和用于制造模块的过程，其中模块向用户提供并行电接口，便于在光数据链路上高速串行传输数据，并且包含多个转换器，用于在电信号和光信号。本发明的优选实施例考虑将光通信模块制造在单个多层卡上，其中所有发射器电气部件位于卡的一侧，所有接收器电气部件位于卡的另一侧，并且发射器和接收器部件由卡中的屏蔽层分开。通过使用两个发射机/接收机对（发射机和接收机位于卡的相应侧），本发明的一个实施例提供双全双工通信。

57. 发明授权

US5068863A Compensating circuit for high power lasers 失效
标题翻译：高功率激光补偿电路
公开(公告)号：US5068863A
公开(公告)日：1991-11-26
申请号：US512296
申请日：1990-04-17
申请人： Forrest F. Fulton
发明人： Forrest F. Fulton
IPC分类号： H01S5/042 , H01S5/062 , H04B10/155
CPC分类号： H04B10/58 , H01S5/06213 , H04B10/504 , H01S5/042
摘要： A circuit which improves the linearity of a high power laser diode is disclosed. A electrical diode is coupled to the anode of the laser diode and a filter/bias network back biases the laser diode and forward biases the PN diode. At lower current levels the amount of current flowing through the laser diode is lowered. At higher current levels, rolloff in the PN diode allows more current through the laser diode. The rolloff performance of the laser diode and PN diode mirror each other closely enough to improve the laser's linear performance by 3 dB to 5 dB.
摘要翻译：公开了一种提高高功率激光二极管的线性度的电路。电二极管耦合到激光二极管的阳极，滤波器/偏置网络背部偏置激光二极管，并向前偏置PN二极管。在较低的电流水平下，流过激光二极管的电流量降低。在较高的电流水平，PN二极管的降低允许更多的电流通过激光二极管。激光二极管和PN二极管的滚降性能相当接近，足以将激光器的线性性能提高3 dB至5 dB。

58. 发明授权

US5063595A Optical communications network 失效
标题翻译：光通信网络
公开(公告)号：US5063595A
公开(公告)日：1991-11-05
申请号：US488046
申请日：1990-05-21
申请人： John W. Ballance
发明人： John W. Ballance
IPC分类号： H04B10/20 , H04B7/24 , H04B10/00 , H04B10/08 , H04B10/155 , H04B10/207 , H04J3/06 , H04J14/00 , H04J14/08 , H04L7/00 , H04L12/28 , H04L25/03 , H04L25/49 , H04M3/00 , H04M11/00
CPC分类号： H04J3/0682 , H04B10/272 , H04B10/50 , H04J14/08 , H04J3/0605 , H04L25/03866
摘要： A passive, all optical communications network is provided in which a single optical source in a central station serves many outstations (e.g., telephones in customers' premises). Time division multiplexed optical signals from a laser source are transmitted along a single optical fibre (14) from a central station (4). The signal is split between several secondary fibres at a first splitter (10) (e.g., an array of passive couplers) and between further sets of fibres at a second set of splitters (12). At this stage there are 120 individual fibres to customers' premises (8). Digital speech or data is sent back to the central station by a laser in the customers' premises operating in a low duty-cycle mode. The 120 data streams are interleaved at the branching points.

59. 发明授权

US5039189A Optical signal distribution network and method of converting independent optical/electrical signals 失效
标题翻译：光信号分配网络和独立光/电信号转换方法
公开(公告)号：US5039189A
公开(公告)日：1991-08-13
申请号：US505614
申请日：1990-04-06
申请人： Richard S. Lytel , Anthony J. Ticknor
发明人： Richard S. Lytel , Anthony J. Ticknor
IPC分类号： G02B6/12 , G02B6/43 , G02F1/313 , H04B10/155 , H04B10/16 , H04B10/17
CPC分类号： G02F1/3132 , G02B6/43
摘要： A network for distributing a set of independent high-frequency electrical signals comprises an optical rail waveguide that is fed with a measured amount of optical power from a single source, and a set of optical railtaps positioned at sequential locations along the optical rail waveguide. Each optical railtap functions to extract a corresponding specified fraction of the measured amount of optical power from the optical rail waveguide when a corresponding one of the independent electrical signals is applied thereto. The fractions of the measured amount of optical power extracted from the optical rail waveguide at the corresponding sequential locations along the optical rail waveguide constitute a set of independent high-frequency optical signals, which correspond to the independent high-frequency electrical signals.
摘要翻译：用于分配一组独立的高频电信号的网络包括从单个源馈送测量量的光功率的光导波导和位于沿着光导波导的顺序位置的一组光轨道搭扣。当将独立电信号中的相应一个施加到其上时，每个光导轨功能用于从光轨波导提取测量的光功率的相应指定分数。在沿着光导轨波导的相应顺序位置处从光轨波导提取的测量光量的分数构成一组独立的高频光信号，其对应于独立的高频电信号。

60. 发明授权

US5003624A Automatic bias controller for electro-optic modulator 失效
标题翻译：电光调制器自动偏置控制器
公开(公告)号：US5003624A
公开(公告)日：1991-03-26
申请号：US501689
申请日：1990-03-29
申请人： William H. Terbrack , Martin G. Lee
发明人： William H. Terbrack , Martin G. Lee
IPC分类号： G02F1/03 , G02F1/01 , G02F1/035 , H04B10/155
CPC分类号： H04B10/50575 , G02F1/0123 , H04B10/58 , G02F2001/212 , H04B2210/075
摘要： A low frequency pilot signal having predetermined positive and negative excursions is applied to an electrical modulation signal input (26) of a Mach-Zehnder electrooptic modulator (18) together with an electrical input signal. A bias voltage VB selected to bias the modulator (18) at a linear point (V.pi./2) is also applied to the signal input (26). The optical output signal of the modulator (18) is sensed, and the magnitudes of the positive and negative excursions of the output signal which correspond to the positive and negative excursions of the pilot signal are compared with each other. If the modulator (18) is linearly biased as desired, the excursions will have the same relative relationship as the excursions of the pilot signal. If the modulator (18) has drifted away from the linear bias point (V.pi./2), one excursion will have a larger magnitude relative to the other than in the pilot signal, indicating the direction of deviation. The bias voltage VB is automatically adjusted toward the linear bias point (V.pi./2). Where the bias voltage range includes a plurality of linear bias points (V.pi./2) within the limits thereof, the voltage difference (2V.pi.) between two of the linear bias points (V.pi./2) is automatically measured at startup. If the modulator (18) drifts into one of the limits, the bias voltage VB is reset to a value spaced from the respective limit by the voltage difference (2V.pi.), thereby automatically resetting the bias voltage VB to another linear point (V.pi./2) within the range.

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