公开(公告)号：US08165477B2

公开(公告)日：2012-04-24

申请号：US11951856

申请日：2007-12-06

申请人： Satomi Shioiri ,  Kiyoshi Fukuchi ,  Toshiharu Ito ,  Hitoshi Takeshita

发明人： Satomi Shioiri ,  Kiyoshi Fukuchi ,  Toshiharu Ito ,  Hitoshi Takeshita

IPC分类号： H04B10/06 ,  H04B10/00 ,  H04B10/12 ,  H04J14/00

CPC分类号： H04B10/677

摘要： The present invention provides a light receiving apparatus using the DQPSK demodulation method. The light receiving apparatus comprises: one Mach-Zehnder interferometer for branching a received light signal into light signals at two arms to allow the branched two light signals to interfere with each other; one balanced photoelectric converter for converting the two interfered light signals, by using the Mach-Zehnder interferometer, into an electric signal corresponding to a difference between light intensities of the two light signals; and a phase adjuster for dynamically shifting the phase of a light signal passed through one of the two arms at the Mach-Zehnder interferometer.

摘要翻译： 本发明提供一种使用DQPSK解调方法的光接收装置。 光接收装置包括：一个马赫 - 曾德干涉仪，用于将接收到的光信号分成两个臂的光信号，以允许分支的两个光信号相互干扰; 一个平衡光电转换器，用于通过使用马赫 - 策德尔干涉仪将两个干涉光信号转换成对应于两个光信号的光强度差的电信号; 以及相位调整器，用于在Mach-Zehnder干涉仪上动态地移动通过两个臂中的一个的光信号的相位。

公开(公告)号：US20080152359A1

公开(公告)日：2008-06-26

申请号：US11951856

申请日：2007-12-06

申请人： Satomi SHIOIRI ,  Kiyoshi Fukuchi ,  Toshiharu Ito ,  Hitoshi Takeshita

发明人： Satomi SHIOIRI ,  Kiyoshi Fukuchi ,  Toshiharu Ito ,  Hitoshi Takeshita

IPC分类号： H04B10/06

CPC分类号： H04B10/677

摘要： The present invention provides a light receiving apparatus using the DQPSK demodulation method. The light receiving apparatus comprises: one Mach-Zehnder interferometer for branching a received light signal into light signals at two arms to allow the branched two light signals to interfere with each other; one balanced photoelectric converter for converting the two interfered light signals, by using the Mach-Zehnder interferometer, into an electric signal corresponding to a difference between light intensities of the two light signals; and a phase adjuster for dynamically shifting the phase of a light signal passed through one of the two arms at the Mach-Zehnder interferometer.

摘要翻译： 本发明提供一种使用DQPSK解调方法的光接收装置。 光接收装置包括：一个马赫 - 曾德干涉仪，用于将接收到的光信号分成两个臂的光信号，以允许分支的两个光信号相互干扰; 一个平衡光电转换器，用于通过使用马赫 - 策德尔干涉仪将两个干涉光信号转换成对应于两个光信号的光强度差的电信号; 以及相位调整器，用于在Mach-Zehnder干涉仪上动态地移动通过两个臂中的一个的光信号的相位。

公开(公告)号：US20080232815A1

公开(公告)日：2008-09-25

申请号：US11916612

申请日：2006-06-28

申请人： Satomi Shioiri ,  Toshiharu Itou ,  Kiyoshi Fukuchi ,  Hitoshi Takeshita

发明人： Satomi Shioiri ,  Toshiharu Itou ,  Kiyoshi Fukuchi ,  Hitoshi Takeshita

IPC分类号： H04B10/04 ,  H04B10/00

CPC分类号： H04J14/08 ,  H04B10/5561 ,  H04B10/66 ,  H04J14/02

摘要： In the optical communication device and the optical communication system using DPSK modulation whose cost is low, whose size is small and whose power consumption is low, the N:1 multiplexer 125 generates a serial signal by multiplexing a parallel signal coded by the DPSK modulation coding units 115˜117 bit by bit on a time division basis. The electric-phase modulation optical converter 127 converts a serial signal into a phase modulation light. The N-bit delay interferometer 132 executes DPSK decoding with respect to a phase modulation light by comparison with an N-bit preceding optical signal. The optical-electric signal converter 134 converts a decoded intensity modulation light into an electric signal. The N:1 demultiplexer 136 divides an electric signal converted by the optical-electric signal converter 134 into a number N of signals bit by bit on a time division basis.

摘要翻译： 在光通信设备和使用成本低，尺寸小并且功耗低的DPSK调制的光通信系统中，N：1多路复用器125通过多路复用由DPSK调制编码编码的并行信号来生成串行信号 单位115〜117，按时间划分。 电相调制光转换器127将串行信号转换为相位调制光。 N位延迟干涉仪132通过与N位在前的光信号进行比较来执行相对于相位调制光的DPSK解码。 光电信号转换器134将解码的强度调制光转换成电信号。 N：1解复用器136将由光电信号转换器134转换的电信号分时分割为数字N个信号。

公开(公告)号：US08639114B2

公开(公告)日：2014-01-28

申请号：US11916612

申请日：2006-06-28

申请人： Satomi Shioiri ,  Toshiharu Itou ,  Kiyoshi Fukuchi ,  Hitoshi Takeshita

发明人： Satomi Shioiri ,  Toshiharu Itou ,  Kiyoshi Fukuchi ,  Hitoshi Takeshita

IPC分类号： H04J14/02 ,  H04J14/08

CPC分类号： H04J14/08 ,  H04B10/5561 ,  H04B10/66 ,  H04J14/02

摘要： In the optical communication device and the optical communication system using DPSK modulation whose cost is low, whose size is small and whose power consumption is low, the N:1 multiplexer 125 generates a serial signal by multiplexing a parallel signal coded by the DPSK modulation coding units 115˜117 bit by bit on a time division basis. The electric-phase modulation optical converter 127 converts a serial signal into a phase modulation light. The N-bit delay interferometer 132 executes DPSK decoding with respect to a phase modulation light by comparison with an N-bit preceding optical signal. The optical-electric signal converter 134 converts a decoded intensity modulation light into an electric signal. The N:1 demultiplexer 136 divides an electric signal converted by the optical-electric signal converter 134 into a number N of signals bit by bit on a time division basis.

摘要翻译： 在光通信设备和使用成本低，尺寸小并且功耗低的DPSK调制的光通信系统中，N：1多路复用器125通过多路复用由DPSK调制编码编码的并行信号来生成串行信号 单位115〜117，按时间划分。 电相调制光转换器127将串行信号转换为相位调制光。 N位延迟干涉仪132通过与N位在前的光信号进行比较来执行相对于相位调制光的DPSK解码。 光电信号转换器134将解码的强度调制光转换成电信号。 N：1解复用器136将由光电信号转换器134转换的电信号分时分割为数字N个信号。

公开(公告)号：US08175455B2

公开(公告)日：2012-05-08

申请号：US12442559

申请日：2007-10-04

申请人： Hitoshi Takeshita ,  Toshiharu Ito

发明人： Hitoshi Takeshita ,  Toshiharu Ito

IPC分类号： H04B10/08

CPC分类号： H04B10/2569

摘要： The present invention is intended to provide an optical transmission system which is applicable not only to a known signal but also to an unknown signal, and has a high reliability at a low cost. A branching device branches an optical transmission output of a transmitter, and transmits the branched signals through different optical transmission channels. A polarization mode dispersion monitor monitors the degree of polarization mode dispersion from the optical transmission channels at the receiving end. A switch control circuit and a switch select a signal which is less affected by a deterioration in quality due to polarization mode dispersion, and outputs the selected signal to receiver 8. In this way, the probability of a deterioration in the quality of a signal due to polarization mode dispersion can be reduced for a transmission signal.

摘要翻译： 本发明旨在提供一种光传输系统，其不仅可应用于已知信号，而且可应用于未知信号，并且以低成本具有高可靠性。 分支装置分支发射机的光传输输出，并通过不同的光传输信道发送分支的信号。 偏振模色散监视器监视来自接收端的光传输通道的偏振模色散程度。 开关控制电路和开关选择由于偏振模式色散而受质量劣化影响较小的信号，并将选择的信号输出到接收器8.以这种方式，信号质量劣化的概率 可以减少发射信号的偏振模色散。

公开(公告)号：US20100021169A1

公开(公告)日：2010-01-28

申请号：US12442559

申请日：2007-10-04

申请人： Hitoshi Takeshita ,  Toshiharu Ito

发明人： Hitoshi Takeshita ,  Toshiharu Ito

IPC分类号： H04J14/02

CPC分类号： H04B10/2569

摘要： The present invention is intended to provide an optical transmission system which is applicable not only to a known signal but also to an unknown signal, and has a high reliability at a low cost. A branching device branches an optical transmission output of a transmitter, and transmits the branched signals through different optical transmission channels. A polarization mode dispersion monitor monitors the degree of polarization mode dispersion from the optical transmission channels at the receiving end. A switch control circuit and a switch select a signal which is less affected by a deterioration in quality due to polarization mode dispersion, and outputs the selected signal to receiver 8. In this way, the probability of a deterioration in the quality of a signal due to polarization mode dispersion can be reduced for a transmission signal.

摘要翻译： 本发明旨在提供一种光传输系统，其不仅可应用于已知信号，而且可应用于未知信号，并且以低成本具有高可靠性。 分支装置分支发射机的光传输输出，并通过不同的光传输信道发送分支的信号。 偏振模色散监视器监视来自接收端的光传输通道的偏振模色散程度。 开关控制电路和开关选择由于偏振模式色散而受质量劣化影响较小的信号，并将选择的信号输出到接收器8.以这种方式，信号质量劣化的概率 可以减少发射信号的偏振模色散。

公开(公告)号：US06538779B1

公开(公告)日：2003-03-25

申请号：US09332930

申请日：1999-06-14

申请人： Hitoshi Takeshita ,  Hirofumi Shimomura ,  Tatsuya Shiragaki ,  Naoya Henmi

发明人： Hitoshi Takeshita ,  Hirofumi Shimomura ,  Tatsuya Shiragaki ,  Naoya Henmi

IPC分类号： H04B1008

CPC分类号： H04L1/20 ,  H04B10/07953 ,  H04L25/063 ,  H04Q11/0005 ,  H04Q2011/0039 ,  H04Q2011/0045 ,  H04Q2011/0083

摘要： A signal quality monitoring method with reliability is disclosed. After extracting a clock signal from the light signal, a decision region is set for each bit of the light signal. The decision region is defined by a plurality of threshold amplitudes corresponding respectively to threshold phases which are produced with respect to the clock signal. The quality of the light signal is monitored depending on whether an amplitude of the light signal falls into the decision region at timings of the N threshold phases.

摘要翻译： 公开了一种具有可靠性的信号质量监测方法。 在从光信号提取时钟信号之后，为光信号的每一位设置判定区域。 决定区域由分别对应于相对于时钟信号产生的阈值相位的多个阈值幅度来定义。 根据在N个阈值相位的定时，光信号的幅度是否落入判定区域来监视光信号的质量。

公开(公告)号：US06895183B2

公开(公告)日：2005-05-17

申请号：US10134479

申请日：2002-04-30

申请人： Hirofumi Shimomura ,  Naoya Henmi ,  Hitoshi Takeshita

发明人： Hirofumi Shimomura ,  Naoya Henmi ,  Hitoshi Takeshita

IPC分类号： H04B10/02 ,  H04B10/08 ,  H04J14/02

CPC分类号： H04B10/03 ,  H04B10/0771 ,  H04B2210/071 ,  H04B2210/072 ,  H04J14/0212 ,  H04J14/0216 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0245 ,  H04J14/0249 ,  H04J14/0278 ,  H04J14/0283 ,  H04J14/0287 ,  H04J14/0293

摘要： An optical wavelength division coupler 11 wavelength-divides a wavelength multiplexed light to respective wavelength lights each of which is dropped to an optical gate switch 15-i (i=1˜n) and a light receiver 13-i by an optical coupler 12-i and supplied to an optical light fault monitor 14 through the light receiver 13-i. When the optical signal deterioration monitor 14 detects an optical loss of wavelength (OLOW), an optical loss of signal (OLOS) or an optical signal degrade (OSD) in wavelength lights processed by the optical coupler 12-i as a fault detection signal in an optical layer, a controller 19 controls the optical gate switch 15-i to cut off wavelength light passing therethrough and sends an optical alarm indication signal (AIS-O) to a downstream side. Therefore, when a loss of signal is detected by the light receiver 13-i, the optical signal deterioration monitor 14 can know the alarm indication signal (AIS) from the upstream side, removing the necessity of special hardware therefor.

摘要翻译： 光波长分离耦合器11将波长复用的光分别波长到分别通过光耦合器12的光栅开关15-i（i = 1〜n）和光接收器13 -i的各波长光， 并通过光接收器13 -i提供给光学灯故障监视器14。 当光信号劣化监视器14检测到光学损耗波长（OLOW）时，由光耦合器12 -i处理的波长光中的光信号损失（OLOS）或光信号降级（OSD）作为故障检测信号 光学层，控制器19控制光栅开关15 -i以截去通过其中的波长的光，并向下游侧发送光学报警指示信号（AIS-O）。 因此，当由光接收器13 -i检测到信号丢失时，光信号劣化监视器14可以从上游侧知道报警指示信号（AIS），从而消除了特殊硬件的必要性。

公开(公告)号：US06404525B1

公开(公告)日：2002-06-11

申请号：US09123529

申请日：1998-07-28

申请人： Hirofumi Shimomura ,  Naoya Henmi ,  Hitoshi Takeshita

发明人： Hirofumi Shimomura ,  Naoya Henmi ,  Hitoshi Takeshita

IPC分类号： H04J1402

CPC分类号： H04B10/03 ,  H04B10/0771 ,  H04B2210/071 ,  H04B2210/072 ,  H04J14/0212 ,  H04J14/0216 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0245 ,  H04J14/0249 ,  H04J14/0278 ,  H04J14/0283 ,  H04J14/0287 ,  H04J14/0293

摘要： An optical wavelength division coupler 11 wavelength-divides a wavelength multiplexed light to respective wavelength lights each of which is dropped to an optical gate switch 15-i (i=1˜n) and a light receiver 13-i by an optical coupler 12-i and supplied to an optical light fault monitor 14 through the light receiver 13-i. When the optical signal deterioration monitor 14 detects an optical loss of wavelength (OLOW), an optical loss of signal (OLOS) or an optical signal degrade (OSD) in wavelength lights processed by the optical coupler 12-i as a fault detection signal in an optical layer, a controller 19 controls the optical gate switch 15-i to cut off wavelength light passing therethrough and sends an optical alarm indication signal (AIS-O) to a downstream side. Therefore, when a loss of signal is detected by the light receiver 13-i, the optical signal deterioration monitor 14 can know the alarm indication signal (AIS) from the upstream side, removing the necessity of special hardware therefor.

摘要翻译： 光波长分离耦合器11将波长复用的光分别通过光耦合器12-D将各个波长的光分别投射到光栅开关15-i（i = 1〜n）和光接收器13-i上， 并通过光接收器13-i提供给光学灯故障监视器14。 当光信号劣化监视器14检测到波长的光学损失（OLOW）时，由光耦合器12-i处理的波长光中的信号（OLOS）的光损失或光信号降级（OSD）作为故障检测信号 光学层，控制器19控制光栅开关15-i截止通过的波长的光，向下游侧发送光学警报指示信号（AIS-O）。 因此，当由光接收器13-i检测到信号丢失时，光信号劣化监视器14可以从上游侧知道报警指示信号（AIS），从而消除了特殊硬件的必要性。

公开(公告)号：US08405511B2

公开(公告)日：2013-03-26

申请号：US12385140

申请日：2009-03-31

申请人： Hitoshi Takeshita

发明人： Hitoshi Takeshita

IPC分类号： G08B17/12

CPC分类号： H04B10/07953

摘要： An optical signal quality monitoring apparatus includes a trajectory length acquirer measuring a Stokes vector of an optical transmission signal over an optical signal modulation frequency band and acquiring the length of a trajectory in the optical signal modulation frequency band traced out on a Poincare sphere by the measured Stokes vector as the measurement value; a DGD acquirer acquiring a DGD value of the optical transmission signal the Stokes vector of which is measured by the trajectory length acquirer; and a quality value estimator estimating a quality value by using the length of the trajectory acquired by the trajectory length acquirer and the DGD value acquired by the DGD acquirer.