公开(公告)号：US5926300A

公开(公告)日：1999-07-20

申请号：US797393

申请日：1997-02-10

申请人： Takayuki Miyakawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Takayuki Miyakawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： G02B27/10 ,  G02B6/34 ,  G02B27/28 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/27 ,  H04B10/29 ,  H04J14/02

CPC分类号： G02B6/2932 ,  G02B6/29383 ,  H04J14/0201 ,  H04J14/0206 ,  H04J14/0213

摘要： The present invention is directed towards an optical ADM apparatus provided with a narrow band-pass filter which is capable of minimizing declination of the transmission characteristics. An optical transmission prohibiting element composed of an optical isolator and a fiber grating is connected in series to the downstream of a fiber grating interposed between two optical circulators. The drop light is reflected by the fiber grating and released from an output optical fiber of the optical circulator. A leak component of the drop light having passed through the fiber grating appears on the side of the isolator and runs across the isolator to the other fiber grating. Most of the leak component is however reflected by the fiber grating while its small portion enters the optical circulator via the fiber grating. The small portion of the leak component is as small as negligible and will hardly interfere with the add light. The optical transmission prohibiting element may be an optical circulator.

摘要翻译： 本发明涉及一种具有窄带通滤波器的光学ADM装置，其能够最小化传输特性的偏差。 由光隔离器和光纤光栅构成的光传输禁止元件串联连接到插入在两个光循环器之间的光纤光栅的下游。 该光束由光纤光栅反射并从光环行器的输出光纤中释放。 穿过光纤光栅的液滴光的泄漏分量出现在隔离器的侧面，并穿过隔离器到另一个光纤光栅。 然而，大多数泄漏分量反射光纤光栅，而其小部分通过光纤光栅进入光环行器。 泄漏部件的一小部分可以忽略不计，几乎不会妨碍加光。 光传输禁止元件可以是光循环器。

公开(公告)号：US5822095A

公开(公告)日：1998-10-13

申请号：US702274

申请日：1996-08-23

申请人： Hidenori Taga ,  Takayuki Miyakawa ,  Shigeyuki Akiba

发明人： Hidenori Taga ,  Takayuki Miyakawa ,  Shigeyuki Akiba

IPC分类号： H04J14/00 ,  G02B6/293 ,  G02B6/34 ,  H04B10/2507 ,  H04B10/27 ,  H04B10/29 ,  H04J14/02 ,  H04L12/40 ,  H04Q11/00

CPC分类号： H04Q11/0003 ,  G02B6/29361 ,  G02B6/29362 ,  G02B6/29383 ,  H04J14/0206 ,  H04J14/0213 ,  H04Q2011/0009 ,  H04Q2011/0015 ,  H04Q2011/0035

摘要： An object of the present invention is to provide an optical add-drop multiplexer capable of giving improved characteristics with a simple, inexpensive arrangement which needs not a corresponding number of optical bandpass filters to the wavelength components of a light signal to be carried. The wavelength components .lambda.1 to .lambda.n of an input n-wave signal is received by an input optical fiber and transmitted through an optical circulator and an optical fiber to an optical bandpass filter which allows a specific wavelength .lambda.1 to pass but rejects the other wavelengths .lambda.2 to .lambda.n. While the rejected wavelengths .lambda.2 to .lambda.n are returned back to the optical fiber, the specific wavelength .lambda.1 runs through another optical fiber and another optical circulator and then is dropped from an output optical fiber. Meanwhile, another signal component of the wavelength .lambda.1 is added and introduced from another input optical fiber through the another optical circulator and the another optical fiber to the optical bandpass filter. Upon the added wavelength .lambda.1 having passed the optical bandpass filter and entering the optical fiber, it is mixed with the rejected wavelengths .lambda.2 to .lambda.n. A resultant sum signal of the full wavelengths .lambda.1 to .lambda.n is passed through the optical circulator and transmitted from an output optical fiber.

摘要翻译： 本发明的一个目的是提供一种光分插复用器，其能够以简单且便宜的布置提供改进的特性，其不需要相对数量的光带通滤波器到待承载的光信号的波长分量。 输入n波信号的波长分量λ1至λn由输入光纤接收，并通过光环行器和光纤传输到允许特定波长λ1通过但拒绝其他的光学带通滤波器 波长λ2到λn。 当被拒绝的波长λ2到λn返回到光纤时，特定波长λ1穿过另一个光纤和另一个光环行器，然后从输出光纤中掉落。 同时，波长λ1的另一个信号分量从另一个输入光纤通过另一光环行器和另一光纤引入光带通滤波器。 当经过光带通滤波器并进入光纤的附加波长λ1时，将其与被拒绝的波长λ2与λn混合。 全波长λ1至λn的合成和信号通过光环行器并从输出光纤传输。

公开(公告)号：US5920413A

公开(公告)日：1999-07-06

申请号：US833097

申请日：1997-04-04

申请人： Takayuki Miyakawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Takayuki Miyakawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： G02B27/28 ,  G02B6/293 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/27 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04J14/0201 ,  H04J14/0206

摘要： An optical add/drop multiplexing scheme capable of reducing the degradation of the transmission characteristic due to the beat noises caused by the interference of the fiber grating leakage components. An optical add/drop multiplexing device is formed by a high speed polarization scrambler for entering signal lights with a data modulation at a high speed bit rate applied thereto, and scrambling polarization states of entered signal lights at high speed, and an optical add/drop element for receiving the signal lights with the polarization states scrambled by the high speed polarization scrambler, and carrying out an add/drop multiplexing operation for signal lights in a specific wavelength among received signal lights. The high speed polarization scrambler scrambles the polarization states of the entered signal lights so as to lower a probability for having worst polarization states of signal lights and interference lights, by scrambling the polarization states of the entered signal lights into every possible polarization states at nearly equal probabilities.

摘要翻译： 一种能够降低由于光纤光栅泄漏部件的干扰引起的节拍噪声导致的传输特性劣化的光分插复用方案。 通过高速偏振加扰器形成光分插多路复用装置，用于以高速比特率对数据调制进入信号光，并以高速加扰输入的信号光的偏振状态，以及光分插 用于接收具有由高速偏振加扰器加扰的偏振状态的信号光的元件，并对接收到的信号光中的特定波长的信号光进行分插复用操作。 高速极化扰频器对输入的信号光的极化状态加扰，从而通过将输入的信号光的偏振状态加扰到几乎相等的每个可能的极化状态，降低具有信号光和干涉光的最差极化状态的概率 概率

公开(公告)号：US5912750A

公开(公告)日：1999-06-15

申请号：US779780

申请日：1997-01-07

申请人： Noriyuki Takeda ,  Takayuki Miyakawa ,  Hidenori Taga ,  Shigeyuki Akiba ,  Shu Yamamoto

发明人： Noriyuki Takeda ,  Takayuki Miyakawa ,  Hidenori Taga ,  Shigeyuki Akiba ,  Shu Yamamoto

IPC分类号： G02B6/02 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04J14/0221

摘要： Wavelength multiplexed optical signals which are input into a first optical amplifier from an optical transmission terminal device over an optical fiber are differently amplified in respective wavelengths due to unevenness of gain of the optical amplifiers and then output. By providing M-transmission optical filters having an M-type transmission characteristic to cancel gain deviation of the optical amplifiers in respective wavelengths, a flat gain characteristic can be achieved even after the optical signals are transmitted via a plurality of optical amplifiers and a plurality of M-transmission optical filters. Also, by removing ASE in a wavelength range of 1.53 .mu.m which prevents signal amplification in a wavelength range of 1.55 .mu.m, the wavelength multiplexed optical signals which are sufficiently amplified can be transmitted to an optical reception terminal device over the optical fiber.

摘要翻译： 通过光纤从光传输终端装置输入到第一光放大器中的波分复用光信号由于光放大器的增益不均匀而在各波长中不同地被放大，然后被输出。 通过提供具有M型传输特性的M传输光学滤波器来消除各个波长的光放大器的增益偏差，即使在通过多个光放大器传输光信号和多个光放大器之后，也可以获得平坦的增益特性 M型传输滤光片。 此外，通过在1.53μm的波长范围内去除ASE，防止在1.55μm的波长范围内的信号放大，可以充分放大的波长复用光信号可以通过光纤传输到光接收终端装置。

公开(公告)号：US06181449B2

公开(公告)日：2001-01-30

申请号：US09032537

申请日：1998-02-27

申请人： Hidenori Taga ,  Kaoru Imai ,  Masatoshi Suzuki ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Hidenori Taga ,  Kaoru Imai ,  Masatoshi Suzuki ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： H04J1402

CPC分类号： H04B10/2935 ,  H04B10/25073 ,  H04B10/25133 ,  H04J14/0221

摘要： A wavelength division multiplexed optical processing device and an optical communication transmission path which are capable of significantly improving the transmission characteristic of wavelength division multiplexed optical signals. A wavelength division multiplexed optical processing device is formed by a first arrayed optical waveguide for demultiplexing entered wavelength division multiplexed optical signals, and outputting demultiplexed optical signals; a plurality of correction units for correcting respective optical signals demultiplexed by the first arrayed optical waveguide; and a second arrayed optical waveguide for multiplexing optical signals corrected by the correction unit, and outputting multiplexed optical signals. An optical communication transmission path is formed by an optical transmission path; and at least one wavelength division multiplexed optical processing device using an arrayed optical waveguide having a transmission wavelength characteristic with a flat top shape, which is inserted into the optical transmission path at a prescribed interval.

摘要翻译： 能够显着提高波分复用光信号的传输特性的波分复用光处理装置和光通信传输路径。 波分复用光处理装置由第一阵列光波导形成，用于对输入的波分复用光信号进行解复用，并输出解复用的光信号; 多个校正单元，用于校正由第一阵列光波导解复用的各个光信号; 以及第二阵列光波导，用于复用由所述校正单元校正的光信号，并且输出复用的光信号。 光通信传输路径由光传输路径形成; 以及使用具有平坦顶部形状的透射波长特性的排列光波导的至少一个波分复用光学处理装置，其以规定的间隔插入到光传输路径中。

公开(公告)号：US5892608A

公开(公告)日：1999-04-06

申请号：US770455

申请日：1996-12-20

申请人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： G02F1/35 ,  H04B10/2507 ,  H04B10/2513 ,  H04B10/40 ,  H04B10/50 ,  H04B10/508 ,  H04B10/556 ,  H04B10/58 ,  H04B10/60 ,  H04J14/08 ,  H04B10/06

CPC分类号： H04B10/25077 ,  H04J14/08

摘要： An optical transmitter which reverses the ON-OFF state of the optical intensity of a bright soliton lightwave and generates a dark soliton lightwave having an optical phase shift, an optical receiver for the dark soliton lightwave, and a superfast, high-capacity optical transmission system which is capable of increasing the soliton pulse array density while suppressing timing jitter. The optical transmission system is provided with the optical transmitter which transmits a dark soliton lightwave having digital information, the optical receiver which receives the dark soliton lightwave as a return-to-zero pulse and a transmission optical fiber interconnecting the transmitter and the receiver. The system has a construction in which the transmission optical fiber has, at the wavelength of the transmission lightwave, a normal dispersion value which makes negative the average wavelength dispersion value over the entire length of the optical fiber, and the average value of the wavelength dispersion value and the optical output intensity of the transmission optical fiber have values so that a non-linear optical effect and a wavelength dispersion effect, which are exerted on the transmission lightwave, are balanced with each other.

摘要翻译： 一种光发射器，其反转明亮的孤子光波的光强度的ON-OFF状态并产生具有光学相移的暗孤子光波，用于暗孤子光波的光接收器，以及超快大容量光传输系统 其能够在抑制定时抖动的同时增加孤子脉冲阵列密度。 光传输系统设置有发射具有数字信息的暗孤子光波的光发射机，接收暗孤子光波作为归零脉冲的光接收机和互连发射机和接收机的传输光纤。 该系统具有这样的结构，其中传输光纤在传输光波长的波长处具有在光纤的整个长度上使平均波长色散值为负的正常色散值，并且波长色散的平均值 值和发射光纤的光输出强度具有使得施加在透射光波上的非线性光学效应和波长色散效应彼此平衡的值。

公开(公告)号：US5629795A

公开(公告)日：1997-05-13

申请号：US521973

申请日：1995-08-31

申请人： Masatoshi Suzuki ,  Itsuro Morita ,  Shu Yamamoto ,  Noboru Edagawa ,  Hidenori Taga ,  Shigeyuki Akiba

发明人： Masatoshi Suzuki ,  Itsuro Morita ,  Shu Yamamoto ,  Noboru Edagawa ,  Hidenori Taga ,  Shigeyuki Akiba

IPC分类号： H04B10/2507 ,  H04B10/2525 ,  H04B10/29 ,  H04B10/291 ,  H01S3/00 ,  H04B10/02

CPC分类号： H04B10/25253

摘要： An optical amplifying-repeating transmission system is disclosed which is composed of an optical fiber for transmitting a lightwave signal with digital information added to return-to-zero lightwave pulses and a plurality of optical amplifying repeaters inserted in the optical fiber for transmission use. The mean value of wavelengths at which the wavelength dispersion of the optical fiber is zero is smaller than the wavelength of the lightwave signal which is transmitted over the system. The accumulated wavelength dispersion value of the optical fiber tends to increase with the distance of transmission, from a macroscopic viewpoint. The optical fiber for transmission is divided into a plurality of sections. In accordance with the accumulated wavelength dispersion value of the optical fiber in each section except at least the last one, a wavelength dispersion medium, which locally changes the wavelength dispersion in a manner to cancel the accumulated wavelength dispersion in the section at the wavelength of the lightwave signal, is inserted in the section to eliminate the accumulation of the timing jitter.

摘要翻译： 公开了一种光放大重复传输系统，其由用于传输光波信号的光纤与添加到归零光波脉冲的数字信息以及插入光纤中的多个光放大中继器组成，用于传输使用。 光纤的波长色散为零的波长的平均值小于在系统上传输的光波信号的波长。 从宏观的观点来看，光纤的累积波长色散值随着透射距离而增加。 用于传输的光纤被分成多个部分。 根据除了至少最后一个部分之外的每个部分中的光纤的累积波长色散值，波长色散介质以局部改变波长色散的方式来消除在波长的波长处的部分中的累积波长色散 光波信号，插入该部分以消除定时抖动的累积。

公开(公告)号：US5585954A

公开(公告)日：1996-12-17

申请号：US346092

申请日：1994-11-29

申请人： Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： H04L1/20 ,  H04L25/02 ,  H04B10/08 ,  H04B10/00

CPC分类号： H04L1/20 ,  H04B10/07953

摘要： An apparatus for measuring optical transmission characteristic, which has an input unit of data signal and of clock pulses, a signal decision unit, a display unit and a control unit. The signal decision unit comprises a plurality of signal decision circuits. A Q value employed as a parameter for the evaluation of the transmission characteristic of an optical communication system can be obtained in real time since bit error rates necessary for the calculation of the Q value can be simultaneously obtained by the plurality of signal decision circuits.

摘要翻译： 一种用于测量光传输特性的装置，其具有数据信号和时钟脉冲的输入单元，信号判定单元，显示单元和控制单元。 信号判定单元包括多个信号判定电路。 可以实时获得用作评估光通信系统的传输特性的参数的Q值，因为可以通过多个信号判定电路同时获得用于计算Q值所需的误码率。

公开(公告)号：US5872647A

公开(公告)日：1999-02-16

申请号：US760411

申请日：1996-12-04

申请人： Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Shigeyuki Akiba

发明人： Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Shigeyuki Akiba

IPC分类号： G02F1/01 ,  H04B10/2569 ,  H04B10/40 ,  H04B10/50 ,  H04B10/516 ,  H04B10/524 ,  H04B10/556 ,  H04B10/60 ,  H04B10/61 ,  H04B10/04

CPC分类号： H04B10/532

摘要： The object of the present invention is to provide an optical transmitter which enables the reduction of the strong dependency of the transmission characteristic on the high-speed polarization scrambler driving signal phase. The light outputted from a light source is converted to a RZ pulse by an electro-absorption modulator. The RZ pulse is modulated by a data modulator, and the polarization thereof is scrambled in a high-speed electro-optic polarization scrambler and outputted from the output terminal thereof. Since, in the present invention, the light is once changed to a RZ pulse, the strong dependency of the optical signal transmission characteristic on the high-speed polarization scrambler driving signal phase can be reduced. Further, if the phase of the RZ pulse in the NRZ modulation signal is made to synchronize with the rising edge or the falling edge of the NRZ signal, the dependency on the high-speed polarization scrambler driving signal phase can be further reduced.

摘要翻译： 本发明的目的是提供一种能够降低传输特性对高速偏振加扰器驱动信号相位的强依赖性的光发射机。 从光源输出的光通过电吸收式调制器转换为RZ脉冲。 RZ脉冲由数据调制器调制，其极化在高速电光偏振扰乱器中被加扰并从其输出端输出。 由于在本发明中，光一度变为RZ脉冲，所以可以降低光信号传输特性对高速偏振加扰器驱动信号相位的强烈依赖性。 此外，如果使NRZ调制信号中的RZ脉冲的相位与NRZ信号的上升沿或下降沿同步，则可以进一步降低对高速偏振加扰器驱动信号相位的依赖性。

公开(公告)号：US5808789A

公开(公告)日：1998-09-15

申请号：US873568

申请日：1997-06-12

申请人： Noboru Edagawa ,  Hidenori Taga ,  Masatoshi Suzuki ,  Itsuro Morita ,  Shu Yamamoto ,  Shigeyuki Akiba

发明人： Noboru Edagawa ,  Hidenori Taga ,  Masatoshi Suzuki ,  Itsuro Morita ,  Shu Yamamoto ,  Shigeyuki Akiba

IPC分类号： H01S3/10 ,  H01S3/06 ,  H04B3/04 ,  H04B10/2513 ,  H04B10/29 ,  H04B10/294 ,  H04J14/00 ,  H04J14/02 ,  G02B6/26 ,  H04B3/14

CPC分类号： H04B10/2935 ,  H04B10/2912

摘要： An optically amplifying transmission system available for wider signal bands includes an optical transmission line 42 divided into two sections 42a and 42b, optically amplifying repeaters 48a having 7 m-long erbium-doped optical fibers to repeat transmission optical fibers 46a in the section 42a, and optically amplifying repeaters 48b having 10.8 m-long erbium-doped optical fibers to repeat transmission optical fibers 46b in the section 42b. The transmission optical fibers 46a an 46b are optical fibers absolutely identical in construction and length.

摘要翻译： 可用于更宽信号频带的光放大传输系统包括分为两部分42a和42b的光传输线42，光放大具有7m长掺铒光纤的中继器48a，以重复部分42a中的传输光纤46a，以及 将具有10.8m长的掺铒光纤的光放大中继器48b重复部分42b中的传输光纤46b。 透射光纤46a，46b是结构和长度完全相同的光纤。