公开(公告)号：WO2023015461A1

公开(公告)日：2023-02-16

申请号：PCT/CN2021/111907

申请日：2021-08-10

申请人： 华为技术有限公司

发明人： 李建平 ,  郭少南 ,  胡克彬 ,  黄丹 ,  于香起

IPC分类号： H04B10/2507 ,  H04B10/58

摘要： 本申请公开一种基站、中心站及非线性信号处理方法，基站包括多个射频链路、光模块、特征计算模块；光模块用于对多个射频链路的信号进行电光转换，将得到的光信号发送到中心站，对光信号进行光电转换得到电信号；多个射频链路中存在第一射频链路和至少一个第二射频链路，光模块包含非线性元器件，至少一个第二射频链路的信号经过非线性元器件后生成与第一射频链路对应频段有交叠的非线性失真信号，光信号中包含非线性失真信号；特征计算模块用于从电信号中提取第一射频链路对应频段的目标信号，根据目标信号和至少一个第二射频链路的信号计算非线性失真预测信号；第一射频链路用于根据非线性失真预测信号对对应频段的信号进行预失真处理。

公开(公告)号：WO2022161952A1

公开(公告)日：2022-08-04

申请号：PCT/EP2022/051642

申请日：2022-01-25

申请人： CAMBRIDGE ENTERPRISE LIMITED

发明人： BAMIEDAKIS, Nikolaos ,  CUNNINGHAM, David George ,  PENTY, Richard Vincent

IPC分类号： H04B10/50 ,  H04B10/58

摘要： Techniques for driving a directly modulated laser whilst correcting non-linearities an optical output waveform, based on generating a modulating current waveform that approximates an ideal modulating current that produces a linear optical output waveform. The techniques enable useful, practical approximations to the ideal modulating current to be determined.

公开(公告)号：WO2019015779A1

公开(公告)日：2019-01-24

申请号：PCT/EP2017/068473

申请日：2017-07-21

申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

发明人： CAVALIERE, Fabio ,  ROMAGNOLI, Marco ,  SORIANELLO, Vito

IPC分类号： H04B10/2507 ,  G02B6/293 ,  H04B10/58

摘要： A transmitter (1) is configured to transmit an optical signal, the transmitter comprising an optical dispersion compensator (10) configured to compensate for chromatic dispersion of the optical signal. The optical dispersion compensator comprises a plurality of delay elements (20; 40). The plurality of delay elements (20; 40) have a combined response providing a delay to the transmitted optical signal which varies with frequency.

公开(公告)号：WO2017019748A1

公开(公告)日：2017-02-02

申请号：PCT/US2016/044218

申请日：2016-07-27

申请人： ADTRAN, INC.

发明人： CRESS, Jared

IPC分类号： H04B10/58

CPC分类号： H01S5/042 ,  H01S5/0261 ,  H01S2301/04 ,  H04B10/58

摘要： Systems, and apparatus for adding reflection based pre-emphasis to a laser driver. In one aspect, a device includes a load (e.g. a laser) having a load impedance, a first end of a transmission line connected to the load, and a reflective impedance element connected to a second end of the transmission line. The reflective impedance element has a given impedance value that differs from the transmission line's characteristic impedance, and the characteristic impedance differs from the load impedance. This mismatch causes reflections between the reflective impedance element and the load. The reflections between the reflective impedance element and the load combine with an incident signal at the load to create a target signal having a target spectral shape.

摘要翻译： 用于将激光驱动器的基于反射的预加重的系统和装置。 在一个方面，一种装置包括具有负载阻抗的负载（例如，激光器），连接到负载的传输线的第一端和连接到传输线的第二端的反射阻抗元件。 反射阻抗元件具有与传输线特性阻抗不同的给定阻抗值，特性阻抗与负载阻抗不同。 这种不匹配导致反射阻抗元件和负载之间的反射。 反射阻抗元件和负载之间的反射与负载处的入射信号组合以产生具有目标光谱形状的目标信号。

公开(公告)号：WO2017010605A1

公开(公告)日：2017-01-19

申请号：PCT/KR2015/008760

申请日：2015-08-21

申请人： 한국과학기술원

发明人： 김승우 ,  김영진 ,  천병재 ,  강현재

IPC分类号： H04B10/58 ,  H04B10/50 ,  H04B10/071 ,  H04B10/11

CPC分类号： H04B10/071 ,  H04B10/11 ,  H04B10/50 ,  H04B10/58

摘要： 본 발명은 펨토초 레이저의 광빗을 이용한 대기 중의 위상 노이즈의 자동 보상을 통한 자유공간 가간섭 광통신 장치 및 방법에 관한 것으로, 상세하게는 펨토초 레이저 광빗으로부터 생성된 송신광의 반사광으로부터 대기외란에 의한 위상 천이값을 획득하고 송신광을 위상 천이값에 따라 전치왜곡(pre-distortion)함으로써, 대기외란에 의한 위상 노이즈를 송신단에서 미리 보상하는 펨토초 레이저의 광빗을 이용한 대기 중의 위상 노이즈의 자동 보상을 통한 자유공간 가간섭 광통신 장치 및 방법에 관한 것이다. 본 발명의 일 실시예에 따른 펨토초 레이저의 광빗을 이용한 대기 중의 위상 노이즈의 자동 보상을 통한 자유공간 가간섭 광통신 장치는 제1광원부, 제2광원부, 변조부, 보상부, 광송신부 및 광수신부를 포함할 수 있다. 제1광원부는 자유공간의 대기외란을 측정하는 제1 레이저광을 출력하고, 제2광원부는 데이터를 전송하는 제2 레이저광을 출력한다. 그리고, 변조부는 기 설정된 변조방식으로 제2 레이저광을 변조하여, 변조광을 생성하며, 보상부는 변조광과 제1 레이저광이 입력되고, 변조광과 제1 레이저광을 중첩한 중첩광을 전치왜곡(pre-distortion)하여 송신광을 생성한다. 마지막으로 광송신부는 송신광을 자유공간을 경유하여 수신기에 송신하고, 광수신부는 송신광이 수신기에 반사되어 입사되는 반사광을 수신한다. 여기서, 보상부는 제1 레이저광과 반사광이 더 입력되고, 반사광과 기준광을 비교하여 상기 자유공간의 대기외란을 측정하고, 측정된 상기 대기외란에 근거하여 중첩광을 전치왜곡한다.

摘要翻译： 本发明涉及一种通过使用飞秒激光的光梳对大气中的相位噪声进行自动补偿的自由空间相干光通信的装置和方法，更具体地，涉及一种用于自由空间相干的装置和方法 通过使用飞秒激光的光梳自动补偿大气中的相位噪声，其中由飞秒激光光梳产生的透射光的反射光获得由于大气扰动引起的相移值，并且 基于相移值预测传输光，从而在传输端对由于大气干扰引起的相位噪声进行预补偿。通过自相关光通信的装置，通过对 根据本发明的实施例，使用飞秒激光的光梳的气氛，c a包括第一光源单元，第二光源单元，调制单元，补偿单元，光传输单元和光接收单元。 第一光源单元用于输出用于测量自由空间的大气干扰的第一激光，并且第二光源单元用于输出用于发送数据的第二激光。 并且调制单元用于通过预设调制方案调制第二激光并用于产生调制光。 补偿单元具有调制光和第一激光的输入，并且用于通过预调制重叠的光来产生透射光，其中调制光和第一激光重叠。 最后，光传输单元用于经由自由空间将传输光发射到接收器，并且光接收单元用于接收具有从接收器反射的传输光的反射光并且在其上入射。 补偿单元还具有第一激光和反射光的输入，并且用于通过比较反射光和参考光来测量自由空间的大气干扰，并且用于基于测量的反射光来预重叠重叠的光 大气扰动

公开(公告)号：WO2014162649A1

公开(公告)日：2014-10-09

申请号：PCT/JP2014/000760

申请日：2014-02-14

申请人： 日本電気株式会社

发明人： 安部　淳一

IPC分类号： H04B10/58 ,  G02F1/01

CPC分类号： H04B10/508 ,  G02F1/0123 ,  G02F2001/212 ,  H04B10/516 ,  H04B10/588 ,  H04L25/03343

摘要： 　本発明のデジタル光送信機は、光変調器で生じる波形歪みを補償するための変換関数を生成する予等化係数演算手段、生成された変換関数を用いて第１のデータ及び第２のデータを予等化処理して第３のデータ及び第４のデータを出力する予等化信号生成手段、および、光変調器を備える。ここで、変換関数により、第１のデータが光変調器の特性に応じて第４のデータへ付与されると共に第２のデータが光変調器の特性に応じて第３のデータへ付与される。

摘要翻译： 该数字光发射机设置有预均衡系数计算装置，用于产生用于补偿在光调制器中产生的波形失真的转换功能，预均衡信号产生装置，用于使用所产生的第一数据预均衡第一数据和第二数据 输出第三数据和第四数据的转换功能，以及光调制器。 这里，通过转换功能，根据光调制器的特性将第一数据赋予第四数据，并且根据光调制器的特性将第二数据赋予第三数据。

公开(公告)号：WO2010044635A3

公开(公告)日：2010-07-29

申请号：PCT/KR2009005964

申请日：2009-10-16

申请人： SAMSUNG ELECTRONICS CO LTD ,  YOKOI ATSUYA

发明人： YOKOI ATSUYA

IPC分类号： H04B10/11 ,  H01L31/0232 ,  H01L33/00 ,  H04B10/116 ,  H04B10/524 ,  H04B10/58 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04B10/116 ,  H04B10/1149

摘要： The present invention provides a visible-light communications system allowing high quality, high-speed communications. More specifically, the visible-light communications system comprises a transmission device which: has a plurality of light-emitting units for emitting light of different colours; makes transmission data correspond to chromaticity points on chromaticity coordinates; calculates the amount of light emitted from each of the light-emitting units in such a way that coloured light of chromaticity points corresponding to the transmission data is sent out; generates a preamble signal used in a channel matrix estimation; and makes each of the light-emitting units emit light on the basis of the preamble signal and the calculated amount of emitted light. Additionally, the visible-light communications system also comprises a receiving device which: has a plurality of light-receiving units for receiving light signals of different colours; estimates the channel matrix on the basis of the light signals corresponding to the preamble signal, when such light signals are received by the various light-receiving units; uses radio waves to carry out compensation on the light signal corresponding to the chromaticity point on the basis of the estimated channel matrix; and demodulates the transmission data by detecting the chromaticity points on the chromaticity coordinates on the basis of the signal after the radio-wave compensation.

摘要翻译： 本发明提供一种允许高质量，高速通信的可见光通信系统。 更具体地，可见光通信系统包括：发射装置，其具有用于发射不同颜色的光的多个发光单元; 使发送数据对应于色度坐标上的色度点; 以与发送数据对应的色度点的色光发出的方式计算从每个发光单元发射的光量; 生成在信道矩阵估计中使用的前同步信号; 并且使得每个发光单元基于前导信号和计算出的发光量发光。 此外，可见光通信系统还包括：接收装置，其具有多个用于接收不同颜色的光信号的光接收单元; 当各种光接收单元接收到这样的光信号时，基于与前导信号对应的光信号，估计信道矩阵; 使用无线电波根据估计的信道矩阵对与色度点对应的光信号进行补偿; 并且通过基于无线电波补偿之后的信号检测色度坐标上的色度点来解调发送数据。

公开(公告)号：WO02045303A1

公开(公告)日：2002-06-06

申请号：PCT/KR2001/002070

申请日：2001-11-30

IPC分类号： H04B10/50 ,  H04B10/58 ,  H04B10/18

CPC分类号： H04B10/58 ,  H04B10/503 ,  H04B10/504

摘要： An apparatus and method for removing nonlinear distortion of an optical transmitter are provided. Some of the power input to a laser diode (LD) are coupled. The coupled result is coupled with a signal containing nonlinear distortion components by a coupling photo diode (PD) within the LD. A signal obtained by shifting the phase of the coupled signal containing the nonlinear distortion components by 180E and maintaining the magnitude of the coupled signal is combined with the coupled signal, thereby removing input signal components and leaving only a distortion signal whose phase is opposite to an input signal. The magnitude and the phase of the distortion signal are adjusted to generate a signal having the same magnitude as and an opposite phase to the distortion signal, thereby removing nonlinear distortion in an optical transmitter. Here, the magnitude and the phase are the function of temperature, so magnitude and phase variation data according to a change in temperature is stored in a memory using a small microprocessor. By fine adjusting the magnitude and the phase according to a change in temperature, reliability against changes in temperature or circumstances can be secured. Accordingly, the apparatus and method are applied to optical transmitters needing high-efficiency and high-power laser diodes so that wide dynamic rage and satisfactory inter-modulation characteristics can be achieved.

摘要翻译： 提供一种用于去除光发射机的非线性失真的装置和方法。 连接到激光二极管（LD）的一部分功率被耦合。 耦合结果与LD内的耦合光电二极管（PD）的包含非线性失真分量的信号耦合。 通过将包含非线性失真分量的耦合信号的相位移动180E并保持耦合信号的幅度而获得的信号与耦合信号组合，从而去除输入信号分量，并且仅留下相位相反的失真信号 输入信号。 调整失真信号的大小和相位以产生与失真信号具有相同幅度和相反相位的信号，从而消除光发射机中的非线性失真。 这里，幅度和相位是温度的函数，因此根据温度变化的幅度和相位变化数据使用小型微处理器存储在存储器中。 通过根据温度的变化精细调整幅度和相位，可以确保抵抗温度变化或环境的可靠性。 因此，该装置和方法被应用于需要高效率和大功率激光二极管的光发射机，从而可以实现宽动态范围和令人满意的互调特性。

公开(公告)号：WO02025843A1

公开(公告)日：2002-03-28

申请号：PCT/EP2000/009264

申请日：2000-09-21

IPC分类号： H03G3/30 ,  H04B10/50 ,  H04B10/564 ,  H04B10/58 ,  H04B10/155

CPC分类号： H04B10/504 ,  H04B10/503 ,  H04B10/564 ,  H04B10/58

摘要： The invention relates to a system and method for transmitting a signal via a non-linear transmission unit, wherein the system aims to reduce distortion in the signal after transmission caused by intermodulation products. For achieving a decrease of intermodulation products in the output signal the system comprises a power splitter (110) for dividing the signal into a main signal and an auxiliary signal. The system further includes a power variation detector (120) for detecting power variations in said auxiliary signal and for generating a control signal representing said power variations. The system further includes a variable attenuator 130 for attenuating the power of said main signal in response to said control signal such that the said power of the main signal being input to said non-linear transmission line (200a) is kept constant if the power of the input signal exceeds a predetermined reference power value Pref. After transmission the signal is recovered by amplifying the main signal by a first variable gain amplifier (310) in response to said control signal.

摘要翻译： 本发明涉及一种通过非线性传输单元传输信号的系统和方法，其中系统旨在减少由互调产物引起的传输后的信号失真。 为了实现输出信号中的互调产物的减少，该系统包括用于将信号分成主信号和辅助信号的功率分配器（110）。 该系统还包括用于检测所述辅助信号中的功率变化并用于产生表示所述功率变化的控制信号的功率变化检测器（120）。 该系统还包括可变衰减器130，用于响应于所述控制信号衰减所述主信号的功率，使得输入到所述非线性传输线（200a）的主信号的所述功率保持恒定，如果 输入信号超过预定参考功率值Pref。 在传输之后，响应于所述控制信号，通过由第一可变增益放大器（310）放大主信号来恢复信号。

公开(公告)号：WO2023018584A1

公开(公告)日：2023-02-16

申请号：PCT/US2022/039180

申请日：2022-08-02

申请人： MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.

发明人： DRAPER, Daniel ,  BROWNLEE, Merrick

IPC分类号： H04B10/079 ,  H04B10/50 ,  H04B10/54 ,  H04B10/58

摘要： A multi-level optical signal is sampled to generate an eye diagram. The signal can be adjusted when eyes in the eye diagram have different heights. More specifically, a first value is determined, and the height of a first eye is adjusted using the first value. The first value is multiplied by a stored factor to produce a second value, and the height of a second eye is adjusted using the second value, and so on for other eyes. As a result, eye heights are the same. Similarly, optical power levels of the signal can be adjusted when the levels are not equally spaced. As a result, the optical power levels are equally spaced.