公开(公告)号：US5539846A

公开(公告)日：1996-07-23

申请号：US410313

申请日：1995-03-24

申请人： Susumu Morikura ,  Satoshi Furusawa ,  Hideaki Takechi

发明人： Susumu Morikura ,  Satoshi Furusawa ,  Hideaki Takechi

IPC分类号： H03G3/02 ,  H03M9/00 ,  H04J3/06 ,  H04J14/00 ,  H04J14/04 ,  H04J14/06 ,  H04L7/00 ,  H04L25/49 ,  G02B6/28

CPC分类号： H04J3/0623

摘要： A parallel signal transmission system for transmitting parallel signals from a transmission unit to a reception unit via an optical fiber, at a low cost without spoiling their quality. The transmission unit converts received parallel signals into serial signals frame by frame, by means of a frame sync signal, and further converts the serial signals into direct current equilibrium signals which are either CMI codes or DMI codes. At the same time, the direct current equilibrium signals are multiplexed with the frame sync signal in accordance with the code ruling violation in order to drive a laser diode having a 0.78 .mu.m wavelength and output intensity-modulated optical signals to the optical transmission path. As the optical transmission path, a plastic clad fiber is used whose core diameter is 200 .mu.m or larger in order to agree with the laser diode having a 0.78 .mu.m wavelength. In the reception unit, the optical signals are photo/electric converted by means of a silicone photo diode, amplified into direct current equilibrium signals having a predetermined amplitude by means of an alternating current coupling type amplifier. The amplified direct current equilibrium signals are divided into serial signals and the frame sync signal by detecting a coding rule violation, and reproduced into original parallel signals by using the divided frame sync signal.

摘要翻译： 一种并行信号传输系统，用于以低成本从光传输单元传输并行信号到接收单元，而不会损害其质量。 传输单元通过帧同步信号逐帧将接收到的并行信号转换为串行信号，并将串行信号转换为CMI码或DMI码的直流平衡信号。 同时，直流平衡信号根据代码规则违规与帧同步信号多路复用，以驱动具有0.78μm波长的激光二极管，并向光传输路径输出强度调制的光信号。 作为光传输路径，使用芯直径为200μm以上的塑料包层光纤，以符合0.78μm波长的激光二极管。 在接收单元中，通过硅光电二极管对光信号进行光电转换，通过交流耦合型放大器放大成具有预定幅度的直流平衡信号。 放大的直流平衡信号通过检测编码规则违反而被分成串行信号和帧同步信号，并通过使用划分的帧同步信号再现成原始的并行信号。

公开(公告)号：US07058300B2

公开(公告)日：2006-06-06

申请号：US10125392

申请日：2002-04-19

申请人： Keisuke Kinoshita ,  Satoshi Furusawa ,  Masaru Fuse ,  Susumu Morikura

发明人： Keisuke Kinoshita ,  Satoshi Furusawa ,  Masaru Fuse ,  Susumu Morikura

IPC分类号： H04B10/08 ,  H04B17/00 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04B10/0775 ,  H04B2210/075

摘要： A transmitting-end device generates a pilot signal with a pilot signal generation section, and transmits a pilot signal to a receiving-end device. At the receiving-end device, a transmission rate modification section detects the transmission band of an optical transmission line based on the amplitude of the pilot signal, and decides a data transmission rate acceptable to the receiving-end device by taking into account the transmission band of the optical transmission line. Based on a maximum data transmission data acceptable to the transmitting-end device and the data transmission rate thus decided, a control section in the receiving-end device arbitrates a data transmission rate between it and the transmitting-end device.

摘要翻译： 发送终端装置利用导频信号生成部生成导频信号，并将导频信号发送到接收端装置。 在接收端设备，传输速率修改部分基于导频信号的幅度来检测光传输线的传输频带，并且通过考虑传输频带来确定接收端设备可接受的数据传输速率 的光传输线。 基于发送端设备可接受的最大数据传输数据和如此决定的数据传输速率，接收端设备中的控制部分仲裁其与发送端设备之间的数据传输速率。

公开(公告)号：US07212745B2

公开(公告)日：2007-05-01

申请号：US09988706

申请日：2001-11-20

申请人： Kazunori Numata ,  Satoshi Furusawa ,  Susumu Morikura

发明人： Kazunori Numata ,  Satoshi Furusawa ,  Susumu Morikura

IPC分类号： H04B10/00 ,  H04B10/12

CPC分类号： G02B6/4204 ,  G02B6/02 ,  G02B6/02033 ,  G02B6/14 ,  G02B6/268 ,  G02B6/32 ,  G02B6/421 ,  H04B10/2581

摘要： In an optical transmission system, a lens converges an optical signal outputted from a light emission element. The optical signal having passed .through the lens enters a multi-mode fiber (MMF). A vertex of the lens and an input plane of the MMF are at a distance. The distance is set to a value which is not equal to the distance from the vertex to a focal point of the lens. As a result, a lowcost optical transmission system can be provided in which the influence of mode dispersion is reduced.

摘要翻译： 在光传输系统中，透镜会聚从发光元件输出的光信号。 通过透镜的光信号进入多模光纤（MMF）。 透镜的顶点和MMF的输入平面距离一定。 该距离被设定为不等于从顶点到透镜焦点的距离的值。 结果，可以提供降低模式色散影响的低成本光传输系统。

公开(公告)号：US06636342B2

公开(公告)日：2003-10-21

申请号：US09764380

申请日：2001-01-19

申请人： Satoshi Furusawa ,  Susumu Morikura

发明人： Satoshi Furusawa ,  Susumu Morikura

IPC分类号： G02F202

CPC分类号： H04J14/02 ,  G02F1/37 ,  H04B10/506 ,  H04B10/572

摘要： A group of semiconductor laser diodes outputs fundamental-wave lights controlled so that each wavelength thereof is double the wavelength of a light for wavelength multiplexing transmission. The fundamental-wave lights are provided to a light receiver, and then to a group of wavelength conversion elements, wherein the fundamental-wave lights are converted into lights each having half the wavelength of each fundamental-wave light. The group of wavelength conversion elements outputs lights including the converted lights each having half the wavelength of each fundamental-wave light and the fundamental-wave lights. The outputted lights are passed through a group of fundamental-wave optical eliminators typified by an optical filter for passing the converted lights and eliminating the fundamental-wave lights, a guiding part, and then an optical multiplexer, and then guided to a transmission medium. Thus, the light controlled in wavelength with high accuracy can be outputted without controlling the semiconductor laser diodes in oscillation wavelength with high accuracy.

摘要翻译： 一组半导体激光二极管输出控制的基波光，使得其每个波长的波长为用于波长复用传输的光的波长的两倍。 将基波光提供给光接收器，然后提供给一组波长转换元件，其中基波光被转换成各自具有每个基波光的一半波长的光。 一组波长转换元件输出包括每个具有每个基波光的一半波长的转换光和基波光的光。 输出的光通过由滤光器代表的一组基波消光器，用于使转换的光通过，并消除基波光，引导部分，然后被引导到光复用器，然后被引导到传输介质。 因此，能够高精度地输出振荡波长的半导体激光二极管，能够高精度地控制波长的光。

公开(公告)号：US06728494B2

公开(公告)日：2004-04-27

申请号：US09854527

申请日：2001-05-15

申请人： Kazunori Numata ,  Satoshi Furusawa ,  Susumu Morikura

发明人： Kazunori Numata ,  Satoshi Furusawa ,  Susumu Morikura

IPC分类号： H04B1004

CPC分类号： H04B10/50

摘要： A digital electrical signal Vin for transmission is supplied to a transistor Q12, a current compensation circuit 11, and a signal current source 13 to be band-compensated for generating a signal current I0. A predetermined current Id for a constant-current source 14 is subtracted from the signal current I0, and the result is an injection current Iin that drives an LED 15. The current Id is adjusted so that the injection current Iin becomes 0 at the low level. Thus, a signal-to-noise (S/N) ratio in waveform of light outputted from the LED 15 can be improved. Accordingly, the S/N ratio of the transmitted signal can be improved with band compensation.

摘要翻译： 用于传输的数字电信号Vin被提供给晶体管Q12，电流补偿电路11和信号电流源13进行带宽补偿以产生信号电流I0。 从信号电流I0减去恒定电流源14的预定电流Id，结果是驱动LED 15的注入电流Iin。调节电流Id，使得注入电流Iin在低电平为0 。 因此，可以提高从LED 15输出的光的波形中的信噪比（S / N）比。 因此，可以通过频带补偿来提高发送信号的S / N比。

公开(公告)号：US06577684B1

公开(公告)日：2003-06-10

申请号：US09287179

申请日：1999-04-06

申请人： Jun Hirano ,  Susumu Morikura ,  Satoshi Furusawa

发明人： Jun Hirano ,  Susumu Morikura ,  Satoshi Furusawa

IPC分类号： H04L2534

CPC分类号： H04L25/4919

摘要： At a transmitting end, a selector multiplexes a command and data inputted from different systems to generate a multiplexed signal string(s). An encoding portion determines an amplitude value of a current multilevel code according to predetermined encoding rules based on a detected symbol and the amplitude value of a multilevel code generated immediately before and generates a multilevel code string. A transmitting portion transmits the generated multilevel code string to a receiving end through a transmission path. A decoding portion of the receiving end decodes and reproduces the command and the data with an amplitude value of the multilevel code string outputted from a receiving portion and the amplitude value of the multilevel code immediately before received according to predetermined decoding rules. The decoding portion separately outputs the command and the data. This allows various types of information to be multiplexed and transmitted with small delay.

摘要翻译： 在发送端，选择器复用从不同系统输入的命令和数据，以产生多路复用的信号串。 编码部根据检测符号和紧接着生成的多级代码的振幅值，根据规定的编码规则来决定当前多级代码的振幅值，生成多级代码串。 发送部通过发送路径将生成的多级代码串发送到接收端。 接收端的解码部分根据预定的解码规则解码并再现从接收部分输出的多级代码串的振幅值和紧接在之前接收的多级代码的振幅值的命令和数据。 解码部分分别输出命令和数据。 这允许各种类型的信息以小的延迟被复用和发送。

公开(公告)号：US06271690B1

公开(公告)日：2001-08-07

申请号：US09534873

申请日：2000-03-24

申请人： Jun Hirano ,  Susumu Morikura ,  Satoshi Furusawa

发明人： Jun Hirano ,  Susumu Morikura ,  Satoshi Furusawa

IPC分类号： H03K5153

CPC分类号： H04L25/063 ,  H03M5/20

摘要： A discriminator capable of generating a multi-level signal with less restrictions is provided. In a discriminator D1, a wave-shaping circuit 3 shapes the waveform of one branched multi-level signal MS, according to a control signal CS from a control signal generator 10 so that a detector 4 that follows the wave-shaping circuit 3 can correctly detect a first reference level RL1. The detector 4 detects the first reference level RL1 from an output signal OS3 from the wave-shaping circuit 3. A reference level generator 5 generates a second reference level RL2 of the multi-level signal MS. A threshold generator 6 generates thresholds Th1, Th2, and Th3 as much as required according to the first and second reference levels RL1 and RL2. Comparators 82 to 84 compares the amplitude of the other branched multi-level signal MS with the thresholds Th1, Th2, and Th3. A control signal generator 10 generates a control signal CS according to the comparison results from the comparators 82 to 84. The above structured discriminator D1 enables the transmitting side to generate a multi-level signal with less restrictions.

摘要翻译： 提供能够产生较少限制的多电平信号的鉴别器。 在鉴频器D1中，波形整形电路3根据来自控制信号发生器10的控制信号CS对一个分支多电平信号MS的波形进行整形，使得跟随波形整形电路3的检测器4可以正确地 检测第一参考电平RL1。 检测器4从来自波形整形电路3的输出信号OS3检测第一参考电平RL1。参考电平发生器5产生多电平信号MS的第二参考电平RL2。 阈值发生器6根据第一和第二参考电平RL1和RL2产生所需的阈值Th1，Th2和Th3。 比较器82至84将另一个分支多电平信号MS的幅度与阈值Th1，Th2和Th3进行比较。 控制信号发生器10根据比较器82至84的比较结果产生控制信号CS。上述结构鉴别器D1使得发送侧能够以较少的限制产生多电平信号。

公开(公告)号：US08824892B2

公开(公告)日：2014-09-02

申请号：US13537567

申请日：2012-06-29

申请人： Hideaki Tamai ,  Satoshi Furusawa ,  Akiya Suzuki

发明人： Hideaki Tamai ,  Satoshi Furusawa ,  Akiya Suzuki

IPC分类号： H04B10/00 ,  H04L12/28 ,  H04L12/12 ,  H04B10/272

CPC分类号： H04B10/272 ,  H04L12/12 ,  H04L12/2861 ,  H04L12/287 ,  Y02D50/40

摘要： In an optical line terminal connectable to optical network units in an optical communication network, an receiver converts an upstream optical signal, received from an optical network unit, into a corresponding upstream electric signal and then derives an upstream control signal controlling the optical line terminal from the upstream electric signal. A controller generates a power control signal switching on or off power supply to the receiver on the basis of the upstream control signal, and a power feeder switches on or off the power supply to the receiver in response to the power control signal. Thus, the optical line terminal can reduce the waste of standby electricity.

摘要翻译： 在连接光通信网络中的光网络单元的光线路终端中，接收机将从光网络单元接收到的上行光信号转换成对应的上行电信号，然后将控制光线路终端的上行控制信号 上游电信号。 控制器基于上游控制信号产生接收或接通电源的功率控制信号，并且电源馈送器根据功率控制信号接通或关断接收机的电源。 因此，光线路终端可以减少备用电力的浪费。

公开(公告)号：US07912215B2

公开(公告)日：2011-03-22

申请号：US11655981

申请日：2007-01-22

申请人： Satoshi Furusawa ,  Masaru Fuse ,  Tsuyoshi Ikushima ,  Tomokazu Sada

发明人： Satoshi Furusawa ,  Masaru Fuse ,  Tsuyoshi Ikushima ,  Tomokazu Sada

IPC分类号： H04L9/22 ,  H04K1/00

CPC分类号： H04L25/4917 ,  H04K1/02 ,  H04L1/0041 ,  H04L1/0045

摘要： A data transmitting apparatus generates, by using predetermined first key information and information data, a multi-level signal in which a signal level changes so as to be approximately random numbers, and converts the multi-level signal into a modulated signal, in a predetermined modulation method and transfer the same. A data receiving apparatus demodulates the modulated signal so as to be converted into a multi-level signal, and reproduces information data from the multi-level signal, using second key information which has the same content as first key information used by the data transmitting apparatus.

摘要翻译： 数据发送装置通过使用预定的第一密钥信息和信息数据生成信号电平变化为大致随机数的多电平信号，并将多电平信号转换为调制信号，以预定的 调制方式和转移相同。 数据接收装置对调制信号进行解调，以便将其转换为多电平信号，并使用与数据发送装置使用的第一密钥信息相同内容的第二密钥信息从多级信号再现信息数据 。

公开(公告)号：US07835524B2

公开(公告)日：2010-11-16

申请号：US11702053

申请日：2007-02-05

申请人： Tsuyoshi Ikushima ,  Satoshi Furusawa ,  Tomokazu Sada ,  Masaru Fuse

发明人： Tsuyoshi Ikushima ,  Satoshi Furusawa ,  Tomokazu Sada ,  Masaru Fuse

IPC分类号： H04L9/26 ,  H04L27/04

CPC分类号： H04L9/0662 ,  H04L2209/125

摘要： A highly concealable data communication apparatus based on an astronomical complexity and causing an eavesdropper to take a significantly increased time to analyze a cipher text, is provided. In a multi-level code generation section 111a, a random number sequence generation section 141 generates, based on predetermined key information 11, a plurality of modulation pseudo-random number sequences. The plurality of modulation pseudo-random number sequences is inputted to a multi-level conversion section 142 as a part of an input bit sequence which is converted into a multi-level code sequence 12. A multi-level processing section 111b combines the multi-level code sequence 12 and information data 10, and generates a multi-level signal 13 having a plurality of levels corresponding to a combination of the multi-level code sequence 12 and the information data 10.

摘要翻译： 提供了一种基于天文复杂性并使窃听者大幅度增加分析密文的时间的高度可隐藏的数据通信装置。 在多级代码生成部111a中，随机数序列生成部141基于规定的密钥信息11生成多个调制伪随机数序列。 多个调制伪随机数序列作为输入比特序列的一部分被输入到多电平转换部分142，该输入比特序列被转换成多级码序列12.多级处理部分111b将多级调制伪随机数序列 电平代码序列12和信息数据10，并且生成具有与多级代码序列12和信息数据10的组合对应的多个级别的多级信号13。