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81 条记录 (耗时 0.032 秒)

    Optical modulating apparatus
    1.
    发明授权
    Optical modulating apparatus 失效
    光调制装置

    公开(公告)号：US6028695A

    公开(公告)日：2000-02-22

    申请号：US124993

    申请日：1998-07-30

    申请人： Aritomo Uemura ,  Takashi Mizuochi ,  Katsuhiro Shimizu ,  Kiwami Matsushita ,  Tadayoshi Kitayama ,  Masatoshi Suzuki ,  Hidenori Taga ,  Shu Yamamoto

    发明人： Aritomo Uemura ,  Takashi Mizuochi ,  Katsuhiro Shimizu ,  Kiwami Matsushita ,  Tadayoshi Kitayama ,  Masatoshi Suzuki ,  Hidenori Taga ,  Shu Yamamoto

    IPC分类号： G02F1/03 ,  H04B10/07 ,  H04B10/516 ,  H04B10/54 ,  H04B10/548 ,  H04B10/58 ,  H04B10/61 ,  G02F1/035 ,  G02F1/055

    CPC分类号： G02F1/0327 ,  G02F2203/25

    摘要： When an intensity modulating operation and a phase modulating operation are carried out by employing a 2-electrode MachZehnder type optical modulator preferably a LN-MZ type optical modulator, a drive signal of this 2-electrode LN-MZ type optical modulator is produced from an intensity modulation signal and a phase modulation signal with a low loss and a simple arrangement. A optical modulating apparatus includes a splitter/combiner structured to split an intensity modulation signal inputted into a first input terminal into a first electric signal having an in-phase relationship with that of the intensity modulation signal and second electric signal having an inverse phase relationship therewith, split a phase modulation signal inputted into a second input terminal into a third electric signal having an in-phase relationship with that of the phase modulation signal an also a fourth electric signal having an in-phase relationship therewith, combine the first electric signal with the fourth electric signal to thereby output a first combined signal, and combine the second electric signal with the third electric signal to thereby output a second combined signal; and an optical modulating means structured to split a light carrier wave entered from a light source into two light carrier waves, and to optically modulate the two sets of the split light carrier waves by using the first combined signal and the second combined signal derived from the splitter/combiner, and combine the two phase-modulated above said light carrier waves to output an optical modulation signal.

    摘要翻译： 当通过使用优选为LN-MZ型光调制器的2电极MachZehnder型光学调制器进行强度调制操作和相位调制操作时，该2电极LN-MZ型光调制器的驱动信号由 强度调制信号和具有低损耗和简单布置的相位调制信号。 光调制装置包括：分离器/组合器，被构造成将输入到第一输入端的强度调制信号分成与强度调制信号的同相关系的第一电信号和与其相反的相位关系的第二电信号 将输入到第二输入端子的相位调制信号分别成为与相位调制信号同相的同步关系的第三电信号，以及与其同相关系的第四电信号，将第一电信号与 第四电信号，从而输出第一组合信号，并将第二电信号与第三电信号组合，从而输出第二组合信号; 以及光调制装置，被构造成将从光源进入的光载波分成两个光载波，并且通过使用从第二组合信号导出的第一组合信号和第二组合信号对两组分裂光载波进行光学调制 分离器/组合器，并且组合在所述轻载波上的两个相位调制以输出光调制信号。

    Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods
    3.
    发明授权
    Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods 失效
    光脉冲位置检测电路及光脉冲发生装置及其方法

    公开(公告)号：US06236488B1

    公开(公告)日：2001-05-22

    申请号：US09052072

    申请日：1998-03-31

    申请人： Katsuhiro Shimizu ,  Takashi Mizuochi ,  Takeshi Komiya ,  Kiwami Matsushita ,  Tadayoshi Kitayama ,  Masatoshi Suzuki ,  Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Itsuro Morita

    发明人： Katsuhiro Shimizu ,  Takashi Mizuochi ,  Takeshi Komiya ,  Kiwami Matsushita ,  Tadayoshi Kitayama ,  Masatoshi Suzuki ,  Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Itsuro Morita

    IPC分类号： H04B1004

    CPC分类号： G02F1/0327 ,  G01J11/00 ,  G02F2203/26 ,  H04J14/08

    摘要： Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator is shifted and supplied to an optical modulator. The optical modulator modulates the optical pulse string based on the electric clock signal and outputs a modulated optical signal. A photo detector converts the modulated optical signal output from the optical modulator to an electric signal. The phase shift amount of the electric clock signal is controlled to maximize an output from the photo detector. Additionally, a dither signal may be used in the control of the phase shift, more than the optical modulator may be employed, and/or more than color light source may be employed. The use of at least one of feed forward and feedback control provided by maximizing an output of the photo detector allows an optical pulse having a short width to be realized.

    摘要翻译： 光脉冲位置的检测使用具有确定的重复比率的光脉冲串和具有与光脉冲串的重复比相同频率的电时钟信号。 电时钟信号振荡器的相位移位并提供给光调制器。 光调制器基于电时钟信号调制光脉冲串，并输出调制光信号。 光检测器将从光调制器输出的调制光信号转换为电信号。 控制电时钟信号的相移量使光检测器的输出最大化。 另外，抖动信号可以用于相移的控制，可以采用多于光调制器，和/或多于彩色光源。 使用通过使光检测器的输出最大化而提供的前馈和反馈控制中的至少一个允许实现具有短宽度的光脉冲。

    Gain-controllable optical amplifier and optical gain-control method
    8.
    发明授权
    Gain-controllable optical amplifier and optical gain-control method 失效
    增益可控光放大器和光增益控制方法

    公开(公告)号：US5710660A

    公开(公告)日：1998-01-20

    申请号：US606653

    申请日：1996-02-26

    申请人： Shu Yamamoto ,  Hidenori Taga ,  Noboru Edagawa ,  Shigeyuki Akiba ,  Kuniaki Motoshima ,  Katsumi Takano ,  Tadayoshi Kitayama

    发明人： Shu Yamamoto ,  Hidenori Taga ,  Noboru Edagawa ,  Shigeyuki Akiba ,  Kuniaki Motoshima ,  Katsumi Takano ,  Tadayoshi Kitayama

    IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/13 ,  H01S3/131 ,  H01S3/00 ,  C02B6/00

    CPC分类号： H04B10/2931 ,  H01S3/06758 ,  H01S3/1301

    摘要： This invention provides an optical amplifier which has low noise characteristics for a wide range of input signal electric power. The optical amplifier has a plurality of cascaded optical amplifying units, a signal level detector, and a pump-source controller. The pump-source controller changes controlling objects from a pump-source corresponding to a first one of the optical amplifying units to a pump-source corresponding to a second one of the optical amplifying units according to a detection level of the signal level detector from a low level to a high level. When the detection level is outside of a control object range, the optical amplifier controls an output from the pump-source to stabilize. When the detection level is within the control object range, the optical amplifier controls an output from a pump-source of each of optical amplifying units according to the detection level.

    摘要翻译： 本发明提供一种对于宽范围的输入信号电力具有低噪声特性的光放大器。 光放大器具有多个级联的光放大单元，信号电平检测器和泵源控制器。 泵源控制器根据来自信号电平检测器的检测电平，将对应于第一光放大单元的泵浦源的控制对象改变为对应于第二光放大单元的泵浦源 低水平到高水平。 当检测电平超出控制对象范围时，光放大器控制泵源的输出稳定。 当检测水平处于控制对象范围内时，光放大器根据检测水平控制每个光放大单元的泵浦源的输出。

    Wavelength division multiplexed optical processing device and optical communication transmission path
    9.
    发明授权
    Wavelength division multiplexed optical processing device and optical communication transmission path 失效
    波分复用光处理装置和光通信传输路径

    公开(公告)号：US06181449B2

    公开(公告)日：2001-01-30

    申请号：US09032537

    申请日：1998-02-27

    申请人： Hidenori Taga ,  Kaoru Imai ,  Masatoshi Suzuki ,  Shu Yamamoto ,  Shigeyuki Akiba

    发明人： Hidenori Taga ,  Kaoru Imai ,  Masatoshi Suzuki ,  Shu Yamamoto ,  Shigeyuki Akiba

    IPC分类号： H04J1402

    CPC分类号： H04B10/2935 ,  H04B10/25073 ,  H04B10/25133 ,  H04J14/0221

    摘要： A wavelength division multiplexed optical processing device and an optical communication transmission path which are capable of significantly improving the transmission characteristic of wavelength division multiplexed optical signals. A wavelength division multiplexed optical processing device is formed by a first arrayed optical waveguide for demultiplexing entered wavelength division multiplexed optical signals, and outputting demultiplexed optical signals; a plurality of correction units for correcting respective optical signals demultiplexed by the first arrayed optical waveguide; and a second arrayed optical waveguide for multiplexing optical signals corrected by the correction unit, and outputting multiplexed optical signals. An optical communication transmission path is formed by an optical transmission path; and at least one wavelength division multiplexed optical processing device using an arrayed optical waveguide having a transmission wavelength characteristic with a flat top shape, which is inserted into the optical transmission path at a prescribed interval.

    摘要翻译： 能够显着提高波分复用光信号的传输特性的波分复用光处理装置和光通信传输路径。 波分复用光处理装置由第一阵列光波导形成，用于对输入的波分复用光信号进行解复用，并输出解复用的光信号; 多个校正单元，用于校正由第一阵列光波导解复用的各个光信号; 以及第二阵列光波导，用于复用由所述校正单元校正的光信号，并且输出复用的光信号。 光通信传输路径由光传输路径形成; 以及使用具有平坦顶部形状的透射波长特性的排列光波导的至少一个波分复用光学处理装置，其以规定的间隔插入到光传输路径中。

    Optical receiver device for dark soliton lightwave
    10.
    发明授权
    Optical receiver device for dark soliton lightwave 失效
    用于暗孤子光波的光接收器

    公开(公告)号：US5892608A

    公开(公告)日：1999-04-06

    申请号：US770455

    申请日：1996-12-20

    申请人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

    发明人： Masatoshi Suzuki ,  Noboru Edagawa ,  Hidenori Taga ,  Shu Yamamoto ,  Shigeyuki Akiba

    IPC分类号： G02F1/35 ,  H04B10/2507 ,  H04B10/2513 ,  H04B10/40 ,  H04B10/50 ,  H04B10/508 ,  H04B10/556 ,  H04B10/58 ,  H04B10/60 ,  H04J14/08 ,  H04B10/06

    CPC分类号： H04B10/25077 ,  H04J14/08

    摘要： An optical transmitter which reverses the ON-OFF state of the optical intensity of a bright soliton lightwave and generates a dark soliton lightwave having an optical phase shift, an optical receiver for the dark soliton lightwave, and a superfast, high-capacity optical transmission system which is capable of increasing the soliton pulse array density while suppressing timing jitter. The optical transmission system is provided with the optical transmitter which transmits a dark soliton lightwave having digital information, the optical receiver which receives the dark soliton lightwave as a return-to-zero pulse and a transmission optical fiber interconnecting the transmitter and the receiver. The system has a construction in which the transmission optical fiber has, at the wavelength of the transmission lightwave, a normal dispersion value which makes negative the average wavelength dispersion value over the entire length of the optical fiber, and the average value of the wavelength dispersion value and the optical output intensity of the transmission optical fiber have values so that a non-linear optical effect and a wavelength dispersion effect, which are exerted on the transmission lightwave, are balanced with each other.

    摘要翻译： 一种光发射器，其反转明亮的孤子光波的光强度的ON-OFF状态并产生具有光学相移的暗孤子光波，用于暗孤子光波的光接收器，以及超快大容量光传输系统 其能够在抑制定时抖动的同时增加孤子脉冲阵列密度。 光传输系统设置有发射具有数字信息的暗孤子光波的光发射机，接收暗孤子光波作为归零脉冲的光接收机和互连发射机和接收机的传输光纤。 该系统具有这样的结构，其中传输光纤在传输光波长的波长处具有在光纤的整个长度上使平均波长色散值为负的正常色散值，并且波长色散的平均值 值和发射光纤的光输出强度具有使得施加在透射光波上的非线性光学效应和波长色散效应彼此平衡的值。