公开(公告)号：US09515733B2

公开(公告)日：2016-12-06

申请号：US14639349

申请日：2015-03-05

申请人： Fujitsu Limited

发明人： Youichi Akasaka ,  Jeng-Yuan Yang ,  Motoyoshi Sekiya ,  Hiroki Ooi ,  Satoru Okano ,  Takuji Maeda

IPC分类号： H04B10/079 ,  H04B10/2507

CPC分类号： H04B10/25073 ,  H04B10/07955 ,  H04J14/0201 ,  H04J14/0221

摘要： Methods and systems for mitigating spectral offset may use a scanning optical filter to scan different frequencies (or wavelengths) in a signal bandwidth of an optical channel. The maximum optical power value for the optical channel may be accurate determined as well as an effective wavelength corresponding to the maximum optical power value.

摘要翻译： 用于减轻频谱偏移的方法和系统可以使用扫描光学滤波器来扫描光信道的信号带宽中的不同频率（或波长）。 可以准确地确定光信道的最大光功率值以及对应于最大光功率值的有效波长。

公开(公告)号：US09923634B2

公开(公告)日：2018-03-20

申请号：US14863170

申请日：2015-09-23

申请人： Fujitsu Limited

发明人： Inwoong Kim ,  Youichi Akasaka ,  Jeng-Yuan Yang ,  Motoyoshi Sekiya

IPC分类号： H04B10/08 ,  H04B17/00 ,  H04B10/00 ,  H04B10/291 ,  H04B10/079 ,  H04B10/2519 ,  H01S5/50 ,  H01S5/10

CPC分类号： H04B10/2912 ,  G02F1/377 ,  G02F1/39 ,  H01S3/00 ,  H01S5/1032 ,  H01S5/50 ,  H04B10/0797 ,  H04B10/2519

摘要： Methods and systems enable amplifying optical signals using a Bragg reflection waveguide (BRW) having second order optical nonlinearity to generate an optical pump by injection locking. The BRW may also be used for parametric amplification of optical signals using the optical pump. Feedback phase-power control may be performed to maximize output power.

公开(公告)号：US09252881B2

公开(公告)日：2016-02-02

申请号：US13907236

申请日：2013-05-31

申请人： Fujitsu Limited

发明人： Youichi Akasaka ,  Jeng-Yuan Yang

IPC分类号： G02F1/39 ,  H04B10/291 ,  H04B10/293 ,  H04B10/299

CPC分类号： H04B10/299 ,  G02F1/395 ,  G02F2001/392 ,  H04B10/2912 ,  H04B10/293

摘要： A method for regenerating optical signals includes determining an input including a source amplitude-modulated optical signal, regenerating the source amplitude-modulated optical signal by using successive saturation modes of amplification, and producing an output optical signal from the regeneration. The source amplitude-modulated optical signal includes input power modulation levels that each indicate information carried on the source amplitude-modulated optical signal. The output optical signal includes output power modulation levels that include information equivalent to information of the input power modulation levels.

摘要翻译： 一种用于再生光信号的方法包括：确定包括源幅度调制光信号的输入，通过使用连续饱和放大模式再生源调幅光信号，并产生来自再生的输出光信号。 源幅度调制光信号包括输入功率调制电平，其各自表示在源幅度调制光信号上承载的信息。 输出光信号包括包括与输入功率调制电平的信息相当的信息的输出功率调制电平。

公开(公告)号：US09246624B1

公开(公告)日：2016-01-26

申请号：US14478717

申请日：2014-09-05

申请人： Fujitsu Limited

发明人： Jeng-Yuan Yang ,  Yoichi Akasaka ,  Motoyoshi Sekiya

IPC分类号： H04B10/02 ,  H04J14/02 ,  H04B10/564 ,  H04B10/532 ,  H04Q11/00

CPC分类号： H04J14/0221 ,  G02F1/3536 ,  G02F1/39 ,  G02F2203/07 ,  H04B10/293 ,  H04B10/50 ,  H04B10/532 ,  H04B10/564 ,  H04Q11/0005 ,  H04Q2011/0016

摘要： A method and system for amplifying optical signals includes generating idler signals for input signals using a pump signal at a first non-linear element (NLE). Phase and amplitude regulation is performed using the output from the first NLE. Optical power monitoring of the input signals may be used for power equalization. The phase regulation may use input from a feed forward phase-power monitoring of the output phase-sensitive amplified signal. After phase regulation the phase-sensitive amplified signal is generated at a second NLE using the pump signal. Optical power monitoring of the input signals may be used for power equalization and other control functions to achieve low-noise operation.

摘要翻译： 用于放大光信号的方法和系统包括使用第一非线性元件（NLE）处的泵浦信号产生用于输入信号的惰轮信号。 使用第一NLE的输出执行相位和幅度调节。 输入信号的光功率监控可用于功率均衡。 相位调节可以使用来自输出相位敏感放大信号的前馈相位功率监视的输入。 在相位调节之后，使用泵浦信号在第二NLE处产生相敏放大信号。 输入信号的光功率监控可用于功率均衡和其他控制功能，以实现低噪声运行。

公开(公告)号：US09197323B2

公开(公告)日：2015-11-24

申请号：US13920785

申请日：2013-06-18

申请人： Fujitsu Limited

发明人： Olga Vassilieva ,  Inwoong Kim ,  Jeng-Yuan Yang ,  Motoyoshi Sekiya

IPC分类号： H04B10/08 ,  H04B10/2507

CPC分类号： H04B10/2572

摘要： Methods and systems for asymmetrically compensating degradation of an optical signal-to-noise ratio (OSNR) induced by polarization dependent loss (PDL) in dual-polarization optical system include using an OSNR compensator. The OSNR compensator may separate the dual-polarization components and determine which component has degraded OSNR. The degraded component may be OSNR compensated using a phase-sensitive amplifier and/or a regenerator with a phase-sensitive amplifier.

摘要翻译： 用于非对称补偿双偏振光学系统中由偏振相关损耗（PDL）引起的光信噪比（OSNR）劣化的方法和系统包括使用OSNR补偿器。 OSNR补偿器可以分离双极化分量，并确定哪个组件已经降低了OSNR。 劣化分量可以使用相敏放大器和/或具有相敏放大器的再生器进行OSNR补偿。

公开(公告)号：US09112605B2

公开(公告)日：2015-08-18

申请号：US13920308

申请日：2013-06-18

申请人： Fujitsu Limited

发明人： Jeng-Yuan Yang ,  Youichi Akasaka ,  Motoyoshi Sekiya ,  Takuji Maeda ,  Hiroki Ooi ,  Satoru Okano

IPC分类号： H04B10/08 ,  H04B10/079 ,  H04B10/2507

CPC分类号： H04B10/07953 ,  H04B10/2572

摘要： The present disclosure includes a method of determining optical signal-to-noise ratio (OSNR) of a signal, comprising separating one polarization component from a plurality of polarization components in an optical signal, selecting one wavelength from a plurality of wavelengths in the optical signal, delaying a first portion of the one polarization component of the one wavelength of the optical signal, shifting a phase of the first portion by a first amount and the first amount plus pi radians, causing the first portion to interfere with a second portion, measuring a power of the interference of the first and second portions, receiving the power of the interference, and comparing the power of the interference when the phase is shifted by the first amount with the interference when the phase is shifted by the first amount plus pi radians to determine OSNR. The present disclosure also includes associated devices.

摘要翻译： 本公开包括确定信号的光信噪比（OSNR）的方法，包括从光信号中的多个偏振分量中分离一个偏振分量，从光信号中的多个波长中选择一个波长 延迟光信号的一个波长的一个偏振分量的第一部分，将第一部分的相位移位第一数量和第一数量加上pi弧度，使第一部分干扰第二部分，测量 第一部分和第二部分的干扰的功率，接收干扰的功率，以及当相位偏移第一量与当相位偏移了第一量值加上pi弧度的干扰时，将干扰的功率进行比较 以确定OSNR。 本公开还包括相关联的设备。

公开(公告)号：US20140198375A1

公开(公告)日：2014-07-17

申请号：US13741177

申请日：2013-01-14

申请人： FUJITSU LIMITED

发明人： Jeng-Yuan Yang ,  Motoyoshi Sekiya ,  Yoichi Akasaka

IPC分类号： G02F1/39 ,  G02F1/35

CPC分类号： H04J14/0221 ,  G02F1/3536 ,  G02F1/39 ,  G02F2203/07 ,  H04B10/293 ,  H04B10/50 ,  H04B10/532 ,  H04B10/564 ,  H04Q11/0005 ,  H04Q2011/0016

摘要： A method for amplifying optical signals includes determining a source optical signal, generating a first resultant signal including a pump signal and the source optical signal, sending the first resultant signal through a non-linear element to generate a second resultant signal including the first resultant signal and an idler signal, and sending the second resultant signal through a non-linear element to perform phase-sensitive amplification. The phase-sensitive amplification results in a third resultant signal including an amplified source optical signal, the pump signal, and the idler signal. The method also includes filtering the third resultant signal to remove the pump signal and the idler signal and outputting the amplified source optical signal.

摘要翻译： 一种用于放大光信号的方法包括确定源光信号，产生包括泵浦信号和源光信号的第一合成信号，通过非线性元件发送第一合成信号，以产生包括第一合成信号的第二合成信号 和惰轮信号，并且通过非线性元件发送第二结果信号以执行相位敏感放大。 相位敏感放大导致包括放大的源光信号，泵浦信号和惰轮信号的第三结果信号。 该方法还包括对第三结果信号进行滤波以去除泵浦信号和空载信号并输出​​放大的源光信号。

公开(公告)号：US09515727B2

公开(公告)日：2016-12-06

申请号：US14639757

申请日：2015-03-05

申请人： Fujitsu Limited

发明人： Jeng-Yuan Yang ,  Youichi Akasaka ,  Motoyoshi Sekiya ,  Takuji Maeda ,  Hiroki Ooi ,  Satoru Okano

IPC分类号： H04B10/079

CPC分类号： H04B10/07953 ,  H04B10/07955

摘要： Methods and systems for in-band OSNR monitoring include a tunable optical filter to scan a passband of a desired optical channel. The optical power over the passband is measured and digitized to power waveform data. The power waveform data is processed with a digital signal processor to calculate OSNR. Additionally, various implementations accommodate dual polarization modulation formats using a parallel architecture and an alternating sequential architecture.

摘要翻译： 用于带内OSNR监测的方法和系统包括用于扫描期望光通道的通带的可调谐滤光器。 通过通带的光功率被测量并数字化以对波形数据供电。 用数字信号处理器处理功率波形数据，以计算OSNR。 此外，各种实施方式适用于使用并行架构和交替顺序架构的双偏振调制格式。

公开(公告)号：US09413455B2

公开(公告)日：2016-08-09

申请号：US14555922

申请日：2014-11-28

申请人： FUJITSU LIMITED

发明人： Shoichiro Oda ,  Yasuhiko Aoki ,  Jeng-Yuan Yang

IPC分类号： H04B10/079

CPC分类号： H04B10/07953

摘要： An apparatus includes: a photodetector configured to create a first electric-signal from an optical signal; a power-measuring unit configured to measure power of the optical signal according to the first electric-signal; a noise calculating unit configured to calculate noise corresponding to a specified target optical signal-to-noise ratio (OSNR) according to the power of the optical signal, the power having been measured by the power-measuring unit, the specified target optical signal-to-noise ratio, and information representing characteristics of the photodetector; a noise generating unit configured to add the noise calculated by the noise calculating unit to the first electric-signal to generate a second electric-signal; an OSNR measuring unit configured to measure an optical signal-to-noise ratio according to the second electric-signal; and a calibration coefficient calculating unit configured to calculate a calibration coefficient used to obtain the target optical signal-to-noise ratio from the optical signal-to-noise ratio measured by the OSNR measuring unit.

摘要翻译： 一种装置包括：光电检测器，被配置为从光信号产生第一电信号; 功率测量单元，被配置为根据第一电信号测量光信号的功率; 噪声计算单元，被配置为根据光信号的功率来计算对应于指定的目标光信噪比（OSNR）的噪声，功率由功率测量单元测量，指定的目标光信号 - 信噪比和表示光检测器特性的信息; 噪声发生单元，被配置为将由噪声计算单元计算出的噪声加到第一电信号上以产生第二电信号; OSNR测量单元，被配置为根据第二电信号测量光信噪比; 以及校准系数计算单元，被配置为根据由OSNR测量单元测量的光信噪比来计算用于获得目标光信噪比的校准系数。

公开(公告)号：US20150200724A1

公开(公告)日：2015-07-16

申请号：US14153692

申请日：2014-01-13

申请人： Fujitsu Limited

发明人： Jeng-Yuan Yang ,  Youichi Akasaka ,  Motoyoshi Sekiya ,  Takuji Maeda ,  Hiroki Ooi ,  Kentaro Nakamura ,  Satoru Okano

IPC分类号： H04B10/079 ,  H04B17/00

CPC分类号： H04B10/07953 ,  H04B17/0085

摘要： The present disclosure includes a computer-implemented method of correcting a measured optical signal-to-noise ratio (OSNR) comprising receiving an optical signal and measuring OSNR of the optical signal using an interferometric OSNR monitor device. The method also includes applying a correction table to the measured OSNR to generate a corrected OSNR using a controller, the correction table comprising a correction function to counteract an artifact in the measured OSNR. The method also includes storing the corrected OSNR in a non-transitory computer-readable medium. The present disclosure also includes associated devices applying the correction table and methods of generating the correction table.

摘要翻译： 本公开包括校正测量的光信噪比（OSNR）的计算机实现的方法，包括使用干涉式OSNR监视器装置接收光信号和测量光信号的OSNR。 该方法还包括将校正表应用于所测量的OSNR以使用控制器产生校正的OSNR，所述校正表包括校正功能以抵消测量的OSNR中的伪像。 该方法还包括将经修正的OSNR存储在非暂时的计算机可读介质中。 本公开还包括应用校正表的相关联的设备和生成校正表的方法。