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    • 2. 发明专利
    • Optical module
    • 光学模块
    • JP2013004945A
    • 2013-01-07
    • JP2011138052
    • 2011-06-22
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社Ntt Electornics CorpNttエレクトロニクス株式会社
    • ASAKA KOTAKAMITSUNA HIDEKIKANDA ATSUSHIKUROSAKI TAKESHIYONEYAMA MIKIOKITAHARA KOJI
    • H01S5/022
    • PROBLEM TO BE SOLVED: To improve a high frequency property even in an optical module which employs a can type package.SOLUTION: A LD element 5 is mounted on a stem mount 1c of a stem 1 connected to a ground, and a high frequency electric signal is supplied to the LD element 5 via lead terminals 2a, 2b. Lower surfaces of chip capacitors 10a, 10b are connected to the stem mount 1c. The lead terminal 2a is connected to a cathode of the LD element 5 via the chip capacitor 10a, and the lead terminal 2b is connected to an anode of the LD element 5 via the chip capacitor 10b. The characteristic impedance of transmission lines 13a, 13b decreases by connecting chip capacitors 10a, 10b, thereby reflections at interfaces of transmission lines 12a, 12b to 13a, 13b are prevented to improve the high frequency characteristic.
    • 要解决的问题:即使在采用罐式封装的光学模块中也能提高高频特性。 解决方案:LD元件5安装在连接到地的杆1的杆安装件1c上,高频电信号通过引线端子2a,2b提供给LD元件5。 片状电容器10a,10b的下表面连接到杆安装件1c。 引线端子2a经由片状电容器10a与LD元件5的阴极连接,引线端子2b经由片状电容器10b与LD元件5的阳极连接。 传输线13a,13b的特性阻抗通过连接片式电容器10a,10b而减小,从而防止在传输线12a,12b至13a,13b的界面处的反射改善了高频特性。 版权所有(C)2013,JPO&INPIT
    • 4. 发明专利
    • Optical module
    • 光学模块
    • JP2013004784A
    • 2013-01-07
    • JP2011135148
    • 2011-06-17
    • Nippon Telegr & Teleph Corp 日本電信電話株式会社Ntt Electornics CorpNttエレクトロニクス株式会社
    • ASAKA KOTAKAMITSUNA HIDEKIKANDA ATSUSHIKUROSAKI TAKESHIYONEYAMA MIKIOKITAHARA KOJI
    • H01S5/022
    • PROBLEM TO BE SOLVED: To improve a high frequency property even in an optical module which employs a can type package.SOLUTION: A stem mount 1c of a stem 1 connected to a ground is electrically connected to a heat sink 6a as a dielectric substrate via a metallization. A LD element 5 is mounted on the heat sink 6a, the high frequency electric signal is supplied to its cathode via a wiring pattern 6b where a lead terminal 2a, a wire 4a, and an open stub 10a are integrally formed thereon, and the high frequency electric signal is supplied to its anode via a wiring pattern 6c where a lead terminal 2b, a wire 4b and an open stub 10b are integrally formed thereon, and a wire 4c. The characteristic impedance of transmission lines 103a, 103b decreases by adding capacitors due to introduction of open stubs 10a, 10b, thereby reflections at interfaces of transmission lines 102a, 102b to 103a, 103b are prevented to improve the high frequency characteristic.
    • 要解决的问题:即使在采用罐式封装的光学模块中也能提高高频特性。 解决方案:连接到地面的杆1的杆安装件1c通过金属化电连接到作为电介质基板的散热器6a。 LD元件5安装在散热器6a上,高频电信号经由布线图案6b向其阴极供电,引线端子2a,导线4a和开口短管10a一体形成在其上,高 经由引线端子2b,导线4b和开口短截线10b一体地形成在其上的布线图案6c和线4c向其阳极供给高频电信号。 传输线103a,103b的特性阻抗由于引入开放短截线10a,10b而增加电容而减小,从而防止了传输线102a,102b至103a,103b的接口处的反射,从而提高了高频特性。 版权所有(C)2013,JPO&INPIT
    • 5. 发明专利
    • Burst mode optical receiver
    • BURST模式光接收器
    • JP2010246041A
    • 2010-10-28
    • JP2009095185
    • 2009-04-09
    • Nippon Telegr & Teleph Corp Ntt Electornics CorpNttエレクトロニクス株式会社日本電信電話株式会社
    • KITAHARA KOJINAKAMURA MAKOTOKUROSAKI TAKESHINISHIHARA SUSUMUITO TAKESHIOKADA AKIRA
    • H04B10/40H04B10/07H04B10/2507H04B10/50H04B10/60H04B10/67H04B10/69
    • PROBLEM TO BE SOLVED: To provide a burst mode optical receiver which has improved responsiveness of conversion gain adjustment of a conversion circuit and can receive a high-speed burst optical signal as a result.
      SOLUTION: The burst mode optical receiver includes: a photodetector 11 which receives a burst optical signal L and outputs a current signal I1; the conversion circuit 13 for converting the current signal I1 of the photodetector 11 into a voltage signal V6; a current mirror circuit 12 for outputting a monitor signal I2 obtained by copying the current signal I1 of the photodetector 11; a differentiation circuit 21 for outputting a differentiation signal V3 obtained by differentiating the current signal I1 of the photodetector 11; and a control circuit 14 for adjusting conversion gain of the conversion circuit 13 on the basis of the monitor signal I2 output by the current mirror circuit 12 and the differentiation signal V3 output by the differentiation circuit 21.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 解决的问题:提供一种突发模式光接收机,其具有改进的转换电路的转换增益调整的响应性并因此可以接收高速脉冲串光信号。 解决方案:突发模式光接收机包括:光电检测器11,其接收突发光信号L并输出电流信号I1; 用于将光电检测器11的电流信号I1转换成电压信号V6的转换电路13; 用于输出通过复制光电检测器11的电流信号I1而获得的监视信号I2的电流镜电路12; 微分电路21,用于输出通过对光电检测器11的电流信号I1进行微分而获得的微分信号V3; 以及用于根据由电流镜电路12输出的监视信号I2和由微分电路21输出的微分信号V3来调整转换电路13的转换增益的控制电路14.版权所有(C)2011 ,JPO&INPIT
    • 10. 发明专利
    • Bit-rate determining device, bit-rate determination method, signal discriminator, and optical-signal reception discriminator
    • 位速率确定装置,位速率确定方法,信号识别器和光信号接收分辨器
    • JP2010011011A
    • 2010-01-14
    • JP2008167215
    • 2008-06-26
    • Nippon Telegr & Teleph Corp Ntt Electornics CorpNttエレクトロニクス株式会社日本電信電話株式会社
    • HARA KAZUTAKAKIMURA SHUNJINAKAMURA HIROTAKAKITAHARA KOJIURABE YOSHIKAZUENDO MASAHIRO
    • H04L25/03
    • PROBLEM TO BE SOLVED: To provide a bit-rate determining device and a bit-rate determination method that allow determination of a signal bit rate, regardless of the signal voltage value, and to provide a signal discriminator and an optical-signal reception discriminator, respectively provided with the bit-rate determination device. SOLUTION: The bit-rate determining device has a first input port 1 for acquiring an input signal from the front of a gate circuit of a first path; a second input port 2 for acquiring an input signal from the front of a gate circuit of a second path; a low-speed bit-rate determining circuit 113, connected to the first input port 1 so as to determine whether the input signal is a low-speed bit rate; a high-speed bit-rate determination circuit 114 connected to the second input port 2 so as to determine whether the input signal is a high-speed bit rate; and a signal output circuit 211, that outputs a control signal from a first control port 3 and a second control port 4, on the basis of the determination results, from the low-speed bit-rate determining circuit 113 and the high-speed bit-rate determining circuit 114. COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:提供一种比特率确定装置和比特率确定方法,其允许确定信号比特率,而不管信号电压值,并且提供信号鉴别器和光信号 接收鉴别器,分别设置有比特率确定装置。 解决方案:比特率确定装置具有用于从第一路径的门电路的前面获取输入信号的第一输入端口1; 用于从第二路径的门电路的前面获取输入信号的第二输入端口2; 低速比特率确定电路113,连接到第一输入端口1,以便确定输入信号是否是低速比特率; 连接到第二输入端口2的高速比特率确定电路114,以便确定输入信号是否是高速比特率; 以及信号输出电路211,其基于判定结果,从低速比特率判定电路113和高速比特位置输出来自第一控制端口3和第二控制端口4的控制信号 速度确定电路114.版权所有(C)2010,JPO&INPIT