公开(公告)号：US06229833B1

公开(公告)日：2001-05-08

申请号：US09274248

申请日：1999-03-23

申请人： Mitsuharu Noda ,  Motoyoshi Sekiya ,  Setsuo Misaizu ,  Tetsuya Kiyonaga ,  Nobuaki Sato ,  Yasunori Nagakubo

发明人： Mitsuharu Noda ,  Motoyoshi Sekiya ,  Setsuo Misaizu ,  Tetsuya Kiyonaga ,  Nobuaki Sato ,  Yasunori Nagakubo

IPC分类号： H01S300

CPC分类号： H01S5/06825 ,  H01S5/042 ,  H01S5/06804

摘要： Disclosed is a laser diode protecting circuit adapted to prevent a laser diode from producing an excessive emission when the laser diode is driven at low temperature, thereby assuring that the laser diode will not be damaged or degraded in terms of its characteristic. When the laser diode is started at low temperature, a laser diode protecting circuit has a power monitor circuit for monitoring backward power of the laser diode and a laser diode current limiting circuit for limiting the laser diode current when the backward power becomes equal to the set power. When the laser diode temperature subsequently rises and the backward power falls below the set power, an automatic current control circuit performs automatic current control in such a manner that the laser diode current attains a set current value. Alternatively, a temperature monitor circuit monitors the temperature of the laser diode and the laser diode current limiting circuit limits the laser diode current when the monitored temperature of the laser diode is less than the set temperature. When the laser diode temperature exceeds the set temperature, the automatic current control circuit performs automatic current control in such a manner that the laser diode attains the set current value.

摘要翻译： 公开了一种激光二极管保护电路，其适于在激光二极管在低温下被驱动时防止激光二极管产生过多的发射，从而确保激光二极管在其特性方面不会被损坏或劣化。 当激光二极管在低温下启动时，激光二极管保护电路具有用于监视激光二极管反向功率的功率监控电路和激光二极管限流电路，用于在反向功率等于设定值时限制激光二极管电流 功率。 当激光二极管温度随后上升并且反向功率下降到设定功率以下时，自动电流控制电路以激光二极管电流达到设定电流值的方式进行自动电流控制。 或者，温度监视电路监测激光二极管的温度，激光二极管限流电路在激光二极管的监视温度小于设定温度时限制激光二极管电流。 当激光二极管温度超过设定温度时，自动电流控制电路以激光二极管达到设定电流值的方式进行自动电流控制。

公开(公告)号：US5900959A

公开(公告)日：1999-05-04

申请号：US763110

申请日：1996-12-10

申请人： Mitsuharu Noda ,  Setsuo Misaizu ,  Motoyoshi Sekiya ,  Yasunori Nagakubo

发明人： Mitsuharu Noda ,  Setsuo Misaizu ,  Motoyoshi Sekiya ,  Yasunori Nagakubo

IPC分类号： H04B10/00 ,  H04B10/071 ,  H04B10/2537 ,  H04B10/54 ,  H04B10/588 ,  H04B10/04

CPC分类号： H04B10/2537

摘要： An optical transmitter comprises a first unit for generating an optical signal having a bandwidth given by a main signal, a second unit modulating the optical signal according to a control signal to extend the bandwidth of the optical signal, a third unit extracting backward light including SBS(stimulated Brillouin scattering) light generated in an optical fiber transmission line, and a fourth unit performing feedback control so that the power of the SBS light becomes substantially constant. Through the structure of the optical transmitter good transmission characteristics of a main signal are obtained and the suppression of the SBS is allowed.

摘要翻译： 光发射机包括：第一单元，用于产生具有由主信号给出的带宽的光信号;第二单元，根据控制信号调制光信号以扩展光信号的带宽;第三单元，提取包括SBS的向后光 （受激布里渊散射）光，以及执行反馈控制的第四单元，使得SBS光的功率变得基本恒定。 通过光发射机的结构获得了主信号的良好传输特性，并允许SBS的抑制。

公开(公告)号：US6097746A

公开(公告)日：2000-08-01

申请号：US41752

申请日：1998-03-13

申请人： Mitsuharu Noda ,  Motoyoshi Sekiya ,  Setsuo Misaizu ,  Tetsuya Kiyonaga

发明人： Mitsuharu Noda ,  Motoyoshi Sekiya ,  Setsuo Misaizu ,  Tetsuya Kiyonaga

IPC分类号： H01S5/042 ,  H01S5/068 ,  H01S5/0683 ,  H01S3/00

CPC分类号： H01S5/06825 ,  H01S5/06804 ,  H01S5/0683

摘要： Disclosed is a laser diode protecting circuit adapted to prevent a laser diode from producing an excessive emission when the laser diode is driven at low temperature, thereby assuring that the laser diode will not be damaged or degraded in terms of its characteristic. When the laser diode is started at low temperature, a laser diode protecting circuit has a power monitor circuit for monitoring backward power of the laser diode and a laser diode current limiting circuit for limiting the laser diode current when the backward power becomes equal to the set power. When the laser diode temperature subsequently rises and the backward power falls below the set power, an automatic current control circuit performs automatic current control in such a manner that the laser diode current attains a set current value. Alternatively, a temperature monitor circuit monitors the temperature of the laser diode and the laser diode current limiting circuit limits the laser diode current when the monitored temperature of the laser diode is less than the set temperature. When the laser diode temperature exceeds the set temperature, the automatic current control circuit performs automatic current control in such a manner that the laser diode attains the set current value.

摘要翻译： 公开了一种激光二极管保护电路，其适于在激光二极管在低温下被驱动时防止激光二极管产生过多的发射，从而确保激光二极管在其特性方面不会被损坏或劣化。 当激光二极管在低温下启动时，激光二极管保护电路具有用于监视激光二极管反向功率的功率监控电路和激光二极管限流电路，用于在反向功率等于设定值时限制激光二极管电流 功率。 当激光二极管温度随后上升并且反向功率下降到设定功率以下时，自动电流控制电路以激光二极管电流达到设定电流值的方式进行自动电流控制。 或者，温度监视电路监测激光二极管的温度，激光二极管限流电路在激光二极管的监视温度小于设定温度时限制激光二极管电流。 当激光二极管温度超过设定温度时，自动电流控制电路以激光二极管达到设定电流值的方式进行自动电流控制。

公开(公告)号：US06501774B2

公开(公告)日：2002-12-31

申请号：US09983184

申请日：2001-10-23

申请人： Hiroshi Kuwahara ,  Norio Nagase ,  Setsuo Misaizu ,  Tetsuya Kiyonaga ,  Tomoyuki Otsuka ,  Motoyoshi Sekiya

发明人： Hiroshi Kuwahara ,  Norio Nagase ,  Setsuo Misaizu ,  Tetsuya Kiyonaga ,  Tomoyuki Otsuka ,  Motoyoshi Sekiya

IPC分类号： H01S313

CPC分类号： H01S5/0687 ,  H01S3/1317 ,  H01S5/06804 ,  H04B10/506 ,  H04B10/572 ,  H04J14/02

摘要： The optical transmission apparatus for multiple wavelengths according to the present invention comprises; a light source, a temperature control section for controlling the temperature of the light source, a temperature control (ATC) loop for controlling the operation of the temperature control section, and a wavelength control (AFC) loop. The ATC loop detects the temperature of the light source and feedback controls the operation of the temperature control section, so that the optical output wavelengths of the light source fall within a wavelength capture range corresponding to a target wavelength of the AFC loop. The AFC loop has a wavelength detection filter having a periodic transmission wavelength characteristic. After the operation of the ATC loop has stabilized, a wavelength capture operation is commenced, and the operation of the temperature control section is controlled so that the optical output wavelength of the light source is captured at a stable point corresponding to a target wavelength, among a plurality of stable points.

摘要翻译： 根据本发明的用于多个波长的光传输装置包括： 光源，用于控制光源的温度的温度控制部，用于控制温度控制部的动作的温度控制（ATC）回路和波长控制（AFC）回路。 ATC环路检测光源的温度，并且反馈控制温度控制部分的操作，使得光源的光输出波长落在对应于AFC回路的目标波长的波长捕获范围内。 AFC回路具有具有周期性透射波长特性的波长检测滤波器。 在ATC环路的操作稳定后，开始波长捕获操作，并且控制温度控制部分的操作，使得在与目标波长相对应的稳定点捕获光源的光输出波长，其中 多个稳定点。

公开(公告)号：US06590686B1

公开(公告)日：2003-07-08

申请号：US09353313

申请日：1999-07-14

申请人： Motoyoshi Sekiya ,  Tetsuya Kiyonaga ,  Yoshitaka Shimura

发明人： Motoyoshi Sekiya ,  Tetsuya Kiyonaga ,  Yoshitaka Shimura

IPC分类号： H04B1004

CPC分类号： H04B10/572 ,  H04B10/503 ,  H04B10/564

摘要： Disclosed herein is an optical transmitter suitable for stabilization of the output power and wavelength of an optical signal. The optical transmitter includes a light source for outputting a light beam, an external modulator for modulating the light beam according to a main signal to thereby output an optical signal, a power monitor for detecting the power of the optical signal output from the external modulator, and a control unit for controlling the light source so that the power detected by the power monitor becomes stable. The light source is controlled according to the power detected on the downstream side of the external modulator, so that the output power of the optical signal to be obtained can be maintained constant with high accuracy irrespective of variations in loss by the external modulator.

摘要翻译： 本文公开了一种适于稳定光信号的输出功率和波长的光发射机。 光发射机包括用于输出光束的光源，根据主信号调制光束的外部调制器，从而输出光信号;功率监视器，用于检测从外部调制器输出的光信号的功率， 以及控制单元，用于控制光源，使得由功率监视器检测的功率变得稳定。 根据在外部调制器的下游侧检测到的功率来控制光源，使得要获得的光信号的输出功率可以以高精度保持恒定，而与外部调制器的损耗变化无关。

公开(公告)号：US06483625B2

公开(公告)日：2002-11-19

申请号：US09998694

申请日：2001-12-03

申请人： Yoshitaka Shimura ,  Motoyoshi Sekiya ,  Tetsuya Kiyonaga

发明人： Yoshitaka Shimura ,  Motoyoshi Sekiya ,  Tetsuya Kiyonaga

IPC分类号： H04B1004

CPC分类号： H04B10/506 ,  H01S5/042 ,  H01S5/0617 ,  H01S5/06825 ,  H01S5/06837 ,  H01S5/0687 ,  H01S5/1032 ,  H04B10/564 ,  H04B10/572

摘要： A WDM optical transmission apparatus of the present invention comprises: a light source (1) for generating light whose wavelength is changed according to the temperature and a drive current; a temperature control section (4) for controlling the temperature of the light source so that a wavelength at the starting of emission of the light source is stabilized in an allowable range of optical output wavelength set in advance; a drive current control section (5) for controlling the drive current applied to the light source according to the allowable range of the optical output wavelength; a wavelength control section (3) for detecting a wavelength of light output from the light source and controlling the temperature of the light source based on the detection result, to lead the optical output wavelength into the vicinity of a predetermined target wavelength; and an operation control section (6) for controlling the start and stop of the control operation of each section at predetermined timing respectively corresponding to the time of optical output generation and the time of optical output stop.

摘要翻译： 本发明的WDM光传输装置包括：用于产生根据温度和驱动电流而波长变化的光的光源（1）; 温度控制部分（4），用于控制光源的温度，使得光源发射的波长在预先设定的光输出波长的允许范围内稳定; 驱动电流控制部分（5），用于根据光输出波长的允许范围来控制施加到光源的驱动电流; 用于检测从光源输出的光的波长并根据检测结果控制光源的温度的波长控制部分（3），以将光输出波长引导到预定目标波长附近; 以及操作控制部分（6），用于分别对应于光输出产生时间和光输出停止时间的预定定时控制每个部分的控制操作的开始和停止。

公开(公告)号：US09083485B2

公开(公告)日：2015-07-14

申请号：US13445756

申请日：2012-04-12

申请人： Xi Wang ,  Inwoong Kim ,  Paparao Palacharla ,  Motoyoshi Sekiya

发明人： Xi Wang ,  Inwoong Kim ,  Paparao Palacharla ,  Motoyoshi Sekiya

IPC分类号： H04J14/02 ,  H04J14/00

CPC分类号： H04J14/0256 ,  H04J14/0212 ,  H04J14/0257 ,  H04J14/026 ,  H04J14/0298

摘要： According to an aspect of an embodiment, a method of spectrum defragmentation in an optical network may include assigning an optical signal within an optical network to a first frequency slot that spans a first portion of an optical spectrum of the optical network. The method may also include constructing a frequency slot dependency map based on the assignation of the optical signal to the frequency slot. The method may also include reassigning, as a result of an optical signal departure event, the optical signal to a second frequency slot based on the frequency slot dependency map. The second frequency slot may span a second portion of the optical spectrum of the optical network.

摘要翻译： 根据实施例的一个方面，光网络中的频谱碎片整理的方法可以包括将光网络内的光信号分配到跨越光网络的光谱的第一部分的第一频率时隙。 该方法还可以包括基于将光信号分配给频率隙来构建频率间隙依赖关系图。 该方法还可以包括根据光信号离开事件将光信号重新分配到基于频率槽依赖性映射的第二时隙。 第二频隙可以跨越光网络的光谱的第二部分。

公开(公告)号：US08989581B2

公开(公告)日：2015-03-24

申请号：US13427754

申请日：2012-03-22

申请人： Inwoong Kim ,  Paparao Palacharla ,  Xi Wang ,  Motoyoshi Sekiya

发明人： Inwoong Kim ,  Paparao Palacharla ,  Xi Wang ,  Motoyoshi Sekiya

IPC分类号： H04J14/02 ,  H04B10/572

CPC分类号： H04B10/572

摘要： An optical network for reassigning a carrier wavelength of an optical signal may include first and second optical nodes. The first optical node may be configured to transmit an optical signal along an optical path. The first optical node may also be configured to tune a carrier wavelength of the optical signal from a first wavelength to a second wavelength, according to a continuous function, to reassign the carrier wavelength of the optical signal. The second optical node may be configured to receive the optical signal and may include a feedback loop configured to adjust a wavelength of a reference optical signal to approximate the carrier wavelength of the optical signal.

摘要翻译： 用于重新分配光信号的载波波长的光网络可以包括第一和第二光节点。 第一光节点可以被配置为沿着光路传输光信号。 第一光节点还可以被配置为根据连续功能将光信号的载波波长从第一波长调谐到第二波长，以重新分配光信号的载波波长。 第二光节点可以被配置为接收光信号，并且可以包括被配置为调整参考光信号的波长以近似光信号的载波波长的反馈回路。

公开(公告)号：US08346965B2

公开(公告)日：2013-01-01

申请号：US12942586

申请日：2010-11-09

申请人： Qiong Zhang ,  Paparao Palacharla ,  Qingya She ,  Xi Wang ,  Motoyoshi Sekiya

发明人： Qiong Zhang ,  Paparao Palacharla ,  Qingya She ,  Xi Wang ,  Motoyoshi Sekiya

IPC分类号： G06F15/16

CPC分类号： H04J14/0257 ,  H04J14/0212

摘要： A method may include constructing an auxiliary graph for a network comprising a plurality of network elements, the network elements having an Internet Protocol layer, a lower layer, and a wavelength layer, the auxiliary graph including a plurality of directed edges, the plurality of directed edges indicative of connectivity of components of the plurality of network elements. The method may further include: (i) deleting directed edges from the auxiliary graph whose available bandwidth is lower than the required bandwidth of a selected demand; (ii) finding a path for the demand on the auxiliary graph via remaining directed edges; (iii) deleting at least one directed edge of the auxiliary graph on the wavelength layer along the path; (iv) adding lower layer lightpath edges to the auxiliary graph for a lower layer lightpath for the path; and (v) converting lower layer lightpaths to Internet Protocol lightpaths if a conversion condition is satisfied.

摘要翻译： 方法可以包括为包括多个网络元件的网络构建辅助图形，所述网络元件具有互联网协议层，下层和波长层，所述辅助图形包括多个有向边缘，所述多个定向 指示多个网络元件的组件的连接性的边缘。 该方法还可以包括：（i）从可用带宽低于所选择的需求的所需带宽的辅助图中删除有向边; （ii）通过剩余的有向边找到对辅助图的需求的路径; （iii）沿所述路径删除所述波长层上的辅助图形的至少一个有向边缘; （iv）将下层光路边缘添加到辅助图形，用于路径的下层光路; 和（v）如果满足转换条件，则将下层光路转换为因特网协议光路。

公开(公告)号：US20090220241A1

公开(公告)日：2009-09-03

申请号：US12395709

申请日：2009-03-01

申请人： Toru KATAGIRI ,  Tomohiro Hashiguchi ,  Yutaka Takita ,  Kazuyuki Tajima ,  Motoyoshi Sekiya ,  Takashi Toyomaki

发明人： Toru KATAGIRI ,  Tomohiro Hashiguchi ,  Yutaka Takita ,  Kazuyuki Tajima ,  Motoyoshi Sekiya ,  Takashi Toyomaki

IPC分类号： H04J14/02

CPC分类号： H04B10/25133 ,  H04J14/0221

摘要： A residual chromatic dispersion target value at a terminal node is set for each wavelength path, and also, candidates of a dispersion compensation amount settable in each chromatic dispersion compensation module on an optical network are set, and further, computation processing is executed for selecting the dispersion compensation amount in each chromatic dispersion compensation module from the candidates so that the sum of errors between the residual chromatic dispersion amounts and the set residual chromatic dispersion target values at the terminal nodes for all of wavelength paths becomes minimum. As a result, for each wavelength path on the optical network, the dispersion compensation amount in each chromatic dispersion compensation module can be designed in optimum so as to satisfy the desired optical signal quality at the terminal node, while considering the residual chromatic dispersion during the transmission.

摘要翻译： 针对每个波长路径设置终端节点的残留色散目标值，并且设置在光网络上的每个色散补偿模块中可设置的色散补偿量的候选，并且还执行计算处理以选择 每个色散补偿模块中的色散补偿量，使得残留色散量与所有波长路径的终端节点处的残留色散目标值之间的误差之和变得最小。 结果，对于光网络上的每个波长路径，可以将每个色散补偿模块中的色散补偿量最优地设计成在终端节点处满足期望的光信号质量，同时考虑到在 传输。