会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 11. 发明申请
    • Optical transmission system
    • 光传输系统
    • US20080205903A1
    • 2008-08-28
    • US12081733
    • 2008-04-21
    • Kazushige YonenagaYutaka MiyamotoAkihiko Matsuura
    • Kazushige YonenagaYutaka MiyamotoAkihiko Matsuura
    • H04B10/04
    • H04B10/5167H04B10/505H04B10/5055
    • An optical transmission system which provides bandwidth restricted optical signal comprises an input terminal (10) for accepting an electrical binary signal, an amplifier (12) for amplifying said electrical binary signal to the level requested for operating an electrical-optical converter (16) such as a Mach Zehnder light modulator, a bandwidth restriction means (14) which is for instance a low pass filter for restricting bandwidth of said electrical binary signal, and an electrical-optical conversion means (16) such as a Mach Zehnder light modulator for converting electrical signal to optical signal. Because of the location of the low pass filter (14) between an output of the amplifier (12) and the Mach Zehnder light modulator (16), the amplifier (12) may operate in saturation region to provide high level output signal enough for operating the Mach Zehnder light modulator, and a signal shaped by the low pass filter (14) is applied to the Mach Zehnder light modulator (16) with excellent waveform. The invention is useful for long distance, large capacity and low cost optical transmission system.
    • 提供带宽限制光信号的光传输系统包括用于接受电二进制信号的输入端(10),用于将所述电二进制信号放大到用于操作电 - 光转换器(16)所请求的电平的放大器(12) 作为马赫曾德尔光调制器,带宽限制装置(14),例如用于限制所述电二进制信号的带宽的低通滤波器,以及诸如马赫曾德尔光调制器的电 - 光转换装置(16),用于转换 电信号到光信号。 由于放大器(12)的输出端与马赫曾德尔光调制器(16)之间的低通滤波器(14)的位置,放大器(12)可以在饱和区域中工作,以提供足够的高电平输出信号 马赫曾德尔光调制器和由低通滤波器(14)成形的信号以优异的波形施加到马赫曾德尔光调制器(16)。 本发明对于长距离,大容量和低成本的光传输系统是有用的。
    • 13. 发明授权
    • Optical transmission system
    • 光传输系统
    • US5543952A
    • 1996-08-06
    • US526277
    • 1995-09-11
    • Kazushige YonenagaShigeru KuwanoNori ShibataSeiji Norimatsu
    • Kazushige YonenagaShigeru KuwanoNori ShibataSeiji Norimatsu
    • H04B10/50H04B10/508H04B10/516H04B10/54H04B10/04
    • H04B10/505H04B10/5051H04B10/508H04B10/5167H04B10/541
    • In a transmitter side in an optical transmission system, an input binary signal is converted into a duobinary signal, and the duobinary signal is applied to an optical modulation device which provides an optical intensity modulation signal, wherein the optical intensity for a center value of the duobinary signal is a minimum, the optical intensity for the other two values of the duobinary signal is a maximum, and an optical phase for those two values is opposite to each other. In a receiver side, simple direct detection is carried out for receiving optical signal through an optical transmission line to provide a demodulated binary signal. Thus, an original binary signal is recovered without a duobinary decoder and receiver sensitivity degradation. In the optical transmission system, an optical carrier frequency component in a signal spectrum is suppressed, a signal bandwidth of the modulated light is reduced in half to that of a prior art, so an optical transmission system for long distance, high bit rate and large traffic capacity is obtained.
    • 在光传输系统的发射机侧,输入二进制信号被转换为双二进制信号,并且双二进制信号被施加到提供光强度调制信号的光调制装置,其中,用于中心值的光强度 双二进制信号是最小的,双二进制信号的其他两个值的光强度是最大的,并且这两个值的光学相位彼此相反。 在接收机侧,进行简单的直接检测,以通过光传输线接收光信号以提供解调的二进制信号。 因此,原始二进制信号被恢复而没有双二进制解码器和接收机灵敏度降级。 在光传输系统中,信号频谱中的光载波频率分量被抑制,调制光的信号带宽减小到现有技术的一半,因此用于长距离,高比特率和大的光传输系统 获得交通容量。
    • 18. 发明申请
    • Optical transmission system, optical transmitter for optical transmission system, and optical for optical transmission system
    • 光传输系统,光传输系统光发射机,光传输系统光传输系统
    • US20070058988A1
    • 2007-03-15
    • US10555710
    • 2005-03-17
    • Kazushige Yonenaga
    • Kazushige Yonenaga
    • H04B10/04H04B10/12
    • H04B10/58H04B10/5051H04B10/5055H04B10/50575H04B10/54H04B10/66
    • An optical transmission system is provided in which the optimum operating point of a Mach-Zehnder interferometer, matched to the optical frequency of the light source on the transmitting side, can be set. The optical receiver (2) has an infinitesimal-modulated signal component detection circuit (222), which uses the signal train output from a balanced detection circuit (221) to detect the infinitesimal-modulated signal component applied to the phase adjustment terminal (201) of an MZI (200) by an infinitesimal-modulated signal oscillation circuit (224); a synchronous detection circuit (223), which synchronously detects the infinitesimal-modulated signals output from the infinitesimal-modulated signal component detection circuit (222) and infinitesimal-modulated signal oscillation circuit (224) and detects the error signal component arising from the shift between the optical signal carrier frequency and the optical frequency characteristic of the MZI (200); and a controller (207), which outputs a control signal to adjust the phase difference between two split optical signals output from the MZI (200) so as to correct the shift amount.
    • 提供了一种光传输系统,其中可以设置与发射侧的光源的光频率相匹配的马赫 - 曾德干涉仪的最佳工作点。 光接收器(2)具有无穷小调制信号分量检测电路(222),其使用从平衡检测电路(221)输出的信号串来检测施加到相位调整端子(201)的无穷小调制信号分量, 通过无穷小调制信号振荡电路(224)的MZI(200); 同步检测电路(223),其同步地检测从无穷小调制信号分量检测电路(222)和无穷小调制信号振荡电路(224)输出的无穷小调制信号,并检测由第二调制信号分量检测电路 MZI(200)的光信号载波频率和光频特性; 以及控制器(207),其输出控制信号以调整从MZI(200)输出的两个分离光信号之间的相位差,以校正偏移量。