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1. 发明专利

JP2013102506A Coherent light receiver, coherent light reception method, and inter-channel skew detection device and detection method for use in coherent light receiver 有权
标题翻译：相干光接收器，相干光接收方法和通道间检测装置及相干光接收器中使用的检测方法
公开(公告)号：JP2013102506A
公开(公告)日：2013-05-23
申请号：JP2013005366
申请日：2013-01-16
申请人： Nec Corp , 日本電気株式会社
发明人： YASUDA WAKAKO , ABE JUNICHI , FUKUCHI KIYOSHI
IPC分类号： H04B10/61 , G02F2/00
CPC分类号： H04B10/616 , H04B10/6151 , H04J14/02 , H04J14/06
摘要： PROBLEM TO BE SOLVED: To solve such a problem that in a coherent light receiver, when a skew occurs between channels, sufficient demodulation becomes impossible and reception performance deteriorates.SOLUTION: A coherent light receiver according to the present invention comprises: a localized light source; a 90° hybrid circuit; a photoelectric converter; an analog-digital converter; and a digital signal processing part. The 90° hybrid circuit outputs a plurality of light signals separated into a plurality of signal components by causing a multiplexed signal light to interfere with a localized light from the localized light source. The photoelectric converter detects the light signal and outputs a detection electrical signal. The analog-digital converter quantizes the detection electrical signal and outputs the quantized signal. The digital signal processing part includes: an FFT operation part for performing high-speed Fourier transformation processing on the quantized signal; a skew compensation part for compensating for a differential delay in propagation between the plurality of signal components calculated from a result of the high-speed Fourier transformation processing; and a demodulation part for demodulating the quantized signal.
摘要翻译：要解决的问题为了解决在相干光接收机中的问题，当在信道之间发生偏斜时，不可能进行足够的解调，并且接收性能劣化。解决方案：根据本发明的相干光接收器包括：局部光源; 90°混合电路; 光电转换器; 模数转换器; 和数字信号处理部分。 90°混合电路通过使复用的信号光干扰来自局部光源的局部光而输出分离成多个信号分量的多个光信号。光电转换器检测光信号并输出检测电信号。模拟数字转换器对检测电信号进行量化并输出量化信号。数字信号处理部包括：FFT运算部，用于对量化信号进行高速傅里叶变换处理; 偏斜补偿部分，用于补偿从高速傅里叶变换处理的结果计算出的多个信号分量之间的传播差分延迟; 以及用于解调量化信号的解调部分。版权所有（C）2013，JPO＆INPIT

2. 发明专利

JP2010206598A Single-core bidirectional optical transmission system, single-core bidirectional optical amplifier, and single-core bidirectional optical transmission method 审中-公开
标题翻译：单芯双向光传输系统，单核双向光放大器和单核双向光传输方法
公开(公告)号：JP2010206598A
公开(公告)日：2010-09-16
申请号：JP2009050569
申请日：2009-03-04
申请人： Nec Corp , 日本電気株式会社
发明人： TAJIMA AKIO , YASUDA WAKAKO , TAKAHASHI SEIGO
IPC分类号： H04B10/00 , H01S3/10 , H04B10/07 , H04B10/2507 , H04B10/272 , H04B10/294 , H04B10/297
摘要： PROBLEM TO BE SOLVED: To provide a single-core bidirectional optical transmission system inexpensively extending a single-core bidirectional optical transmission path. SOLUTION: A plurality of optical signals different in wavelength are multiplexed. Bidirectional transmission is performed between a first optical transmission/reception terminal 10A and a second optical transmission/reception terminal 10B via a single-core bidirectional transmission path 500. First signal light from an optical transmitter (Tx) 200 in the first optical transmission/reception terminal 10A and second signal light to be input to an optical receiver (Rx) 300 in the first optical transmission/reception terminal 10A via the single-core bidirectional transmission path 500 are multiplexed in the same direction using a Red/Blue filter 120 that is an example of an optical multiplexing element, and collectively amplified in an optical amplification part 110 of a single optical amplifier 100 by using the first signal light of a larger signal level as clamp light. The amplified second and first signal light are demultiplexed to the optical receiver (Rx) 300 and the single-core bidirectional transmission path 500, respectively, by a Red/Blue filter 130 that is an example of an optical demultiplexing element. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种廉价地扩展单芯双向光传输路径的单核双向光传输系统。解决方案：波长不同的多个光信号被多路复用。在第一光发送/接收终端10A和第二光发送/接收终端10B之间经由单核双向传输路径500进行双向传输。来自第一光发送/接收中的光发送器（Tx）200的第一信号光端子10A和经由单芯双向传输路径500输入到第一光发送/接收终端10A中的光接收器（Rx）300的第二信号光使用红/蓝滤波器120在相同方向上被多路复用光复用元件的示例，并且通过使用较大信号电平的第一信号光作为钳位光，在单个光学放大器100的光放大部分110中集中放大。放大的第二和第一信号光分别通过作为光解复用元件的示例的红/蓝滤波器130解复用到光接收器（Rx）300和单核双向传输路径500。版权所有（C）2010，JPO＆INPIT

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