公开(公告)号：US06178037B1

公开(公告)日：2001-01-23

申请号：US09028825

申请日：1998-02-24

申请人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka ,  Terumi Chikama

发明人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka ,  Terumi Chikama

IPC分类号： H01S300

CPC分类号： H01S3/1301 ,  H01S5/0617 ,  H01S5/06808 ,  H01S5/0683 ,  H01S5/50

摘要： A computer-controlled optical amplifying apparatus, which includes an optical amplifying unit including an optical amplifying medium and an optical amplifying control unit controlling the optical amplifying unit under the control of a computer. This optical amplifying control unit is constituted by a status monitoring unit for monitoring the status, an optical output control unit for controlling the optical amplifying unit in accordance with the result of monitoring of status; and a status restoring unit for initializing the control status of the optical output control unit by initializing the computer when detecting an occurrence of the abnormal status by the result of monitoring of status and restoring the optical output control unit to the control status before occurrence of the related abnormal status within a relaxation time inherent in the optical amplifying medium occurring accompanied with this initialization.

摘要翻译： 一种计算机控制的光学放大装置，其包括具有光放大介质的光放大单元和在计算机的控制下控制光放大单元的光放大控制单元。 该光放大控制单元由用于监视状态的状态监视单元，根据状态监视结果控制光放大单元的光输出控制单元构成; 以及状态恢复单元，用于通过初始化计算机的初始化来初始化光输出控制单元的控制状态，该状态恢复单元通过状态监视的结果检测到异常状态的发生，并且在发生之前将光输出控制单元恢复到控制状态 在与该初始化相关的光放大介质中固有的弛豫时间内的相关异常状态。

公开(公告)号：US5737118A

公开(公告)日：1998-04-07

申请号：US601244

申请日：1996-02-14

申请人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka ,  Terumi Chikama

发明人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka ,  Terumi Chikama

IPC分类号： H01S3/094 ,  H01S3/06 ,  H01S3/067 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/13 ,  H01S5/042 ,  H01S5/06 ,  H01S5/068 ,  H01S5/0683 ,  H01S5/50 ,  H04B10/03 ,  H04B10/07 ,  H04B10/079 ,  H04B10/293 ,  H04B10/90 ,  H01S3/00

CPC分类号： H01S3/1301 ,  H01S5/0683 ,  H01S5/0617 ,  H01S5/06808 ,  H01S5/50

摘要： A computer-controlled optical amplifying apparatus, which includes an optical amplifying unit including an optical amplifying medium and an optical amplifying control unit controlling the optical amplifying unit under the control of a computer. This optical amplifying control unit is constituted by a status monitoring unit for monitoring the status, an optical output control unit for controlling the optical amplifying unit in accordance with the result of monitoring of status; and a status restoring unit for initializing the control status of the optical output control unit by initializing the computer when detecting an occurrence of the abnormal status by the result of monitoring of status and restoring the optical output control unit to the control status before occurrence of the related abnormal status within a relaxation time inherent in the optical amplifying medium occurring accompanied with this initialization.

摘要翻译： 一种计算机控制的光学放大装置，其包括具有光放大介质的光放大单元和在计算机的控制下控制光放大单元的光放大控制单元。 该光放大控制单元由用于监视状态的状态监视单元，根据状态监视的结果控制光放大单元的光输出控制单元构成; 以及状态恢复单元，用于通过初始化计算机的初始化来初始化光输出控制单元的控制状态，该状态恢复单元通过状态监视的结果检测到异常状态的发生，并且在发生之前将光输出控制单元恢复到控制状态 在与该初始化相关的光放大介质中固有的弛豫时间内的相关异常状态。

公开(公告)号：US06411431B1

公开(公告)日：2002-06-25

申请号：US09911418

申请日：2001-07-25

申请人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka

发明人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka

IPC分类号： H01S0300

摘要： An optical amplifier for amplifying light in a longer wavelength band. The optical amplifier includes first and second optical fibers doped with a rare earth element and optically connected so that a signal light travels through the first optical fiber and then through the second optical fiber. Excitation light causes the signal light to be amplified in both the first and second optical fibers. Spontaneous emission lights are generated in the first optical fiber. An oscillation generator causes the spontaneous emission lights to oscillate in the first optical fiber, to thereby generate laser oscillation. Light generated by the laser oscillation is supplied to the second optical fiber as excitation light in the second optical fiber. The oscillation generator can be formed by fiber gratings along the first optical fiber and which reflect spontaneous emission light at a predetermined wavelength, thereby causing spontaneous emission lights to oscillate between the fiber gratings in the first optical fiber. Alternatively, the oscillation generator can be a traveling-wave type optical oscillator. In an additional embodiment, an optical amplifier includes first and second optical amplifiers amplifying first and second signal lights, respectively, the first and second signal lights being in different wavelength bands. An excitation light providing device branches a portion of the signal light amplified by the first optical amplifier, and provides the branched portion to the second optical amplifier as excitation light in the second optical amplifier.

公开(公告)号：US06288834B1

公开(公告)日：2001-09-11

申请号：US09334622

申请日：1999-06-17

申请人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka

发明人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka

IPC分类号： H01S300

CPC分类号： H04B10/291 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/094003 ,  H01S3/094023 ,  H04B10/2972

摘要： An optical amplifier for amplifying light in a longer wavelength band. The optical amplifier includes first and second optical fibers doped with a rare earth element and optically connected so that a signal light travels through the first optical fiber and then through the second optical fiber. Excitation light causes the signal light to be amplified in both the first and second optical fibers. Spontaneous emission lights are generated in the first optical fiber. An oscillation generator causes the spontaneous emission lights to oscillate in the first optical fiber, to thereby generate laser oscillation. Light generated by the laser oscillation is supplied to the second optical fiber as excitation light in the second optical fiber. The oscillation generator can be formed by fiber gratings along the first optical fiber and which reflect spontaneous emission light at a predetermined wavelength, thereby causing spontaneous emission lights to oscillate between the fiber gratings in the first optical fiber. Alternatively, the oscillation generator can be a traveling-wave type optical oscillator. In an additional embodiment, an optical amplifier includes first and second optical amplifiers amplifying first and second signal lights, respectively, the first and second signal lights being in different wavelength bands. An excitation light providing device branches a portion of the signal light amplified by the first optical amplifier, and provides the branched portion to the second optical amplifier as excitation light in the second optical amplifier.

摘要翻译： 一种用于放大较长波段的光的光放大器。 光放大器包括掺杂有稀土元素的第一和第二光纤并且光学连接，使得信号光通过第一光纤然后通过第二光纤。 激励光使信号光在第一和第二光纤中都被放大。 在第一光纤中产生自发发光。 振荡发生器使自发发射光在第一光纤中振荡，从而产生激光振荡。 由激光振荡产生的光作为第二光纤中的激发光提供给第二光纤。 振荡发生器可以由沿着第一光纤的光纤光栅形成，并且反射出预定波长的自发发射光，从而使自发发射光在第一光纤中的光纤光栅之间振荡。 或者，振荡发生器可以是行波型光学振荡器。 在另外的实施例中，光放大器包括分别放大第一和第二信号光的第一和第二光放大器，第一和第二信号光分别处于不同的波段。 激发光提供装置分支由第一光放大器放大的信号光的一部分，并将分支部分提供给第二光放大器作为第二光放大器中的激发光。

公开(公告)号：US5050176A

公开(公告)日：1991-09-17

申请号：US540284

申请日：1990-06-19

申请人： Takao Naito ,  Terumi Chikama ,  Shigeki Watanabe ,  Tetsuya Kiyonaga ,  Hiroshi Onaka ,  Yoshihito Onoda

发明人： Takao Naito ,  Terumi Chikama ,  Shigeki Watanabe ,  Tetsuya Kiyonaga ,  Hiroshi Onaka ,  Yoshihito Onoda

IPC分类号： H01S3/10 ,  H04B10/516 ,  H04B10/556 ,  H04B10/61 ,  H04L27/20 ,  H04L27/22 ,  H04L27/227 ,  H04L27/233

CPC分类号： H04L27/2331 ,  H04B10/50 ,  H04B10/504 ,  H04B10/5561 ,  H04B10/60 ,  H04B10/64 ,  H04L27/2096 ,  H04L27/223 ,  H04L27/2276

摘要： A direct modulation PSK system and method, in a coherent optical fiber transmission system, in which an injection current supplied to a laser diode is adapted to be directly varied is disclosed. In this system or method, a modulating current pulse is superposed on a bias current for the laser diode so that a specified phase condition may be satisfied. Thereby, a differential coding circuit and an external modulator being indispensable for a DPSK system become unnecessary and, in addition, the system becomes less susceptible to the influence of wavelength dispersion than the DPSK system and able to reproduce the carrier.

公开(公告)号：US06545784B2

公开(公告)日：2003-04-08

申请号：US09905066

申请日：2001-07-16

申请人： Kazue Okazaki ,  Hiroshi Onaka ,  Hideyuki Miyata ,  Yutaka Kai ,  Terumi Chikama

发明人： Kazue Okazaki ,  Hiroshi Onaka ,  Hideyuki Miyata ,  Yutaka Kai ,  Terumi Chikama

IPC分类号： H04J1402

CPC分类号： H04Q11/0005 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04J14/0221 ,  H04M1/274558 ,  H04M1/274583 ,  H04M2250/60 ,  H04Q2011/0016 ,  H04Q2011/0018 ,  H04Q2011/0024 ,  H04Q2011/0045 ,  H04Q2011/0049

摘要： M wavelength separating sections receive multiplexed optical signals each having N kinds of wavelengths different. Each of the multiplexed optical signals are separated into N optical signals. M relays conduct optical reproduction and relay to convert each of the N optical signals into electric signals and then produce optical signals modulated with desired optical wavelengths. A refill section mutually refills M sets of the reproduced and relayed optical signals. A focusing section focuses the M sets of optical signals refilled in the refill section. A light source supplies input lights having desired wavelengths, which lights are modulated in the relays. The light source includes N light sources outputting N kinds of optical wavelengths. A multiplexer/brancher multiplexes the lights from the N light sources to produce a multiplexed light and branches the multiplexed light into M×N distributed lights. M wavelength filters distribuitively receive N distributed lights of the M×N distributed lights.

摘要翻译： M个波长分离部分接收各自具有不同N种波长的复用光信号。 复用光信号中的每一个被分离为N个光信号。 M继电器进行光学再现和继电以将N个光信号中的每一个转换为电信号，然后产生用期望的光波长调制的光信号。 重新填充部分相互重新填充M组再现和中继的光信号。 聚焦部分将重新填充的M组光信号聚焦在再填充部分中。 光源提供具有期望波长的输入光，哪些光在继电器中被调制。 光源包括输出N种光波长的N个光源。 多路复用器/分路器复用来自N个光源的光，以产生多路复用的光，并将多路复用的光分支到MxN分布式光。 M波长滤波器分布式接收MxN分布式灯的N个分布式灯。

公开(公告)号：US06366376B1

公开(公告)日：2002-04-02

申请号：US09223563

申请日：1998-12-31

申请人： Hideyuki Miyata ,  Hiroshi Onaka ,  Terumi Chikama

发明人： Hideyuki Miyata ,  Hiroshi Onaka ,  Terumi Chikama

IPC分类号： H04J1402

CPC分类号： H04B10/2563 ,  H04J14/0224

摘要： An optical transmitting device which combines a plurality of signal lights, each having a different, corresponding, frequency, into a wavelength division multiplexed signal light. The frequencies are spaced apart from each other in a manner with eliminates the effects of four-wave mixing (FWM). More specifically, the difference in frequencies of any pair-combination of the signal lights is different from the difference in frequencies between any other pair-combination of the signal lights. Moreover, the plurality of signal lights include n signal lights having respectively corresponding frequencies f1 through fn arranged in order from f1 to fn along a frequency spectrum, where frequencies f1 through fn−1 have respectively corresponding integer spacing coefficients m1 through mn−1, and frequencies fi and fi+1 are separated by mi·&Dgr;fS−F, where i=1 to (n−1) and &Dgr;fS−F is a unit of spacing between frequencies. m1 through mn−1 are all different from each other. In addition, m1 through mn−1 and the sum of any consecutive (n−2) spacing coefficients m1 through mn−1 should all be different from each other. The sum of m1 through mn−1 can be minimized to minimize required bandwidth.

摘要翻译： 一种光发射装置，其将具有不同相应频率的多个信号光组合成波分复用信号光。 频率彼此间隔开，消除了四波混频（FWM）的影响。 更具体地，信号光的任何组合的频率差异与信号光的任何其它对组合之间的频率差异不同。 此外，多个信号光包括n个信号光，其中频率f1至fn-1分别具有对应的整数间隔系数m1至mn-1，分别具有分别对应的频率f1至fn，其频率f1至fn按频率顺序排列，并且 频率fi和fi + 1由mi.DELTAfS-F分开，其中i = 1到（n-1），DELTAfS-F是频率之间的间隔单位。 m1到mn-1都是不同的。 此外，m1至mn-1以及任何连续（n-2）个间隔系数m1至mn-1的总和应该彼此不同。 可以将m1至mn-1的总和最小化以最小化所需的带宽。

公开(公告)号：US06285479B1

公开(公告)日：2001-09-04

申请号：US09050105

申请日：1998-03-30

申请人： Kazue Okazaki ,  Hiroshi Onaka ,  Hideyuki Miyata ,  Yutaka Kai ,  Terumi Chikama

发明人： Kazue Okazaki ,  Hiroshi Onaka ,  Hideyuki Miyata ,  Yutaka Kai ,  Terumi Chikama

IPC分类号： H04J1402

CPC分类号： H04Q11/0005 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04J14/0221 ,  H04M1/274558 ,  H04M1/274583 ,  H04M2250/60 ,  H04Q2011/0016 ,  H04Q2011/0018 ,  H04Q2011/0024 ,  H04Q2011/0045 ,  H04Q2011/0049

摘要： The present invention relates to an optical cross connect unit comprising M wavelength separating sections for receiving multiplexed optical signals each having N kinds of wavelengths different from each other through M optical fibers, respectively, and for wavelength-separating each of the multiplexed optical signals into N optical signals, M optical reproduction relay sections each for conducting an optical reproduction and relay in a manner of making a conversion of each of the N optical signals, wavelength-separated in each of the wavelength separating sections, into an electric signal and then modulating it with a desired optical wavelength, a refill section for mutually refilling M sets of optical signals optically reproduced and relayed in the optical reproduction relay sections, a focusing section for focusing the M sets of optical signals refilled in the refill section, and a light source unit for supplying input lights having desired wavelengths to be modulated in the M optical reproduction relay sections. The light source unit includes N light sources for outputting lights having the N kinds of optical wavelengths, a multiplexing and branching section for multiplexing the lights from the N light sources to produce a multiplexed light having N kinds of optical wavelength components and further for branching the multiplexed light into M×N lights to output them as multiplexed and distributed lights, M wavelength filter sections for distributively receiving N multiplexed and distributed lights of the M×N multiplexed and distributed lights branched in the multiplexing and branching section to output N lights due to the passage of only arbitrary wavelengths of the N kinds of optical wavelengths, and a wavelength setting control section for setting optical wavelengths, which pass through the wavelength filter sections, so that they differ from each other. The N lights from each of the M wavelength filter sections are supplied as the input lights. In the case that many light sources are necessary for the modulation processing by modulators or the like, this optical cross connect unit is also suitable because of using given wavelengths from a small number of light sources for a lot of modulation processing.

公开(公告)号：US07142785B2

公开(公告)日：2006-11-28

申请号：US10354077

申请日：2003-01-30

申请人： Kazue Otsuka ,  Hiroshi Onaka ,  Terumi Chikama

发明人： Kazue Otsuka ,  Hiroshi Onaka ,  Terumi Chikama

IPC分类号： H04B10/00

CPC分类号： H04J14/021 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0221

摘要： A light branching/inserting apparatus which can easily control light signal wavelengths, and which can branch, insert or transmit light signals having an optional wavelength and optional multiplexed number, by using a wavelength selection filter utilizing acousto-optic effects. The apparatus comprises; an ADM node section 10 which has an AOTF 11 with four ports as a wavelength selection filter and is connected to a transmission path, an RF signal generator 20 which generates an RF signal of an optional frequency and applies the signal to the AOTF 11, a selected wavelength-variable light branching section 30 which receives and processes the light signal output from the branching port of the AOTF 11 for each wavelength, a light inserting section 40 which generates an optional number of insertion light signals with optional wavelengths and sends the insertion light signals to an insertion port of the AOTF 11, and a monitoring section 50 which monitors the spectrum of the light signal input/output to/from the ADM node section 10.

摘要翻译： 一种光分支/插入装置，其可以容易地控制光信号波长，并且可以通过使用利用声光效应的波长选择滤波器来分支，插入或发送具有可选波长和可选复用数的光信号。 该装置包括： 具有AOTF 11的ADM节点部分10，其具有四个端口作为波长选择滤波器并连接到传输路径; RF信号发生器20，其生成任选频率的RF信号并将该信号施加到AOTF 11; 选择的波长可变光分支部分30，其接收和处理从每个波长的AOTF 11的分支端口输出的光信号;光插入部分40，其产生任选数量的具有任选波长的插入光信号，并发送插入光 信号到AOTF11的插入端口，以及监视部分50，其监视从/从ADM节点部分10输入/输出的光信号的频谱。

公开(公告)号：US5568305A

公开(公告)日：1996-10-22

申请号：US462565

申请日：1995-06-05

申请人： Takao Naito ,  Terumi Chikama ,  Hiroshi Onaka

发明人： Takao Naito ,  Terumi Chikama ,  Hiroshi Onaka

IPC分类号： H03D3/06 ,  H03D3/22 ,  H03D9/04 ,  H04B10/06

CPC分类号： H04B10/60 ,  H03D3/22 ,  H04B10/64 ,  H03D9/04

摘要： A heterodyne receiver including a frequency discriminator adapted such that a signal to be subjected to frequency discrimination is divided into two signals and mixed together after one of the divided signals has been given a delay time, and additionally provided with a filter, of which a cutoff frequency is determined according to the delay time, disposed in the front stage. This results in both improvement of accuracy in frequency identification and expansion of the capture range.

摘要翻译： 一种外差接收机，包括频率鉴别器，其适于使得要被频率鉴别的信号被划分为两个信号，并且在一个分频信号被给予延迟时间之后混合在一起，并且另外设置有滤波器，其中截止 频率根据延迟时间确定，处于前置阶段。 这样可以提高频率识别的准确性和捕获范围的扩大。