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    • 31. 发明申请
    • Optical transmitter outputting a plurality of signal light with a preset wavelength span
    • 光发射机以预设的波长跨度输出多个信号光
    • US20100183307A1
    • 2010-07-22
    • US12320295
    • 2009-01-22
    • Kengo Matsumoto
    • Kengo Matsumoto
    • H04J14/02
    • H04J14/0221H04B10/506
    • An optical transmitter that multiplexes a plurality of signal light each having less chirp characteristic by the CML technique is disclosed. The optical transmitter comprises a plurality of optical modules, a plurality of TEC controllers each driving the TEC in the optical module, a de-multiplexer that de-multiplexes the output of respective modules, an etalon filter, and a monitoring unit that monitors the component of the signal light output from respective modules. The TEC controller controls the temperature of the LD in the module such that two emission wavelengths of the LD each corresponding to the ON level and the OFF level is set in both side of one of the critical wavelengths of the etalon filter where the transmittance thereof becomes a maximum.
    • 公开了一种通过CML技术复用具有较少啁啾特性的多个信号光的光发射机。 光发射机包括多个光模块,多个TEC控制器,每个TEC控制器驱动光模块中的TEC,解复用器,对多个模块的输出进行解复用,标准器滤波器以及监控组件 从各个模块输出的信号光。 TEC控制器控制模块中LD的温度,使得每个对应于ON电平和OFF电平的LD的两个发射波长被设置在标准具滤波器的一个临界波长的两侧,其中透射率变为 最大。
    • 32. 发明申请
    • Optical transmitter with EA-modulator
    • 具有EA调制器的光发射机
    • US20070183790A1
    • 2007-08-09
    • US11654025
    • 2007-01-17
    • Kengo Matsumoto
    • Kengo Matsumoto
    • H04B10/04
    • H04B10/505H04B10/564
    • The present invention is to provide an optical transmitter that includes an EA-modulator and has a function to monitor the optical output power from the EA-modulator with a simplified and small-sized circuit. The transmitter provides a semiconductor optical device integrating a laser diode with the EA-modulator, a driver, and a termination resistor. One terminal of the resistor is connected to the anode of the EA-modulator, while, the other terminal of the resistor is grounded in the AC mode. The driver is coupled in the AC mode with the terminal of the resistor and the anode of the EA-modulator via a capacitor to provide a modulation signal to the modulator. The EA-modulator is reversely biased through the resistor.
    • 本发明提供一种包括EA调制器的光发射机,并且具有利用简化和小型电路监测来自EA调制器的光输出功率的功能。 发射机提供了将激光二极管与EA调制器,驱动器和终端电阻集成的半导体光学器件。 电阻器的一个端子连接到EA调制器的阳极,而电阻器的另一端在AC模式下接地。 驱动器通过电容器与AC模式与电阻器的端子和EA调制器的阳极耦合,以向调制器提供调制信号。 EA调制器通过电阻反向偏置。
    • 38. 发明授权
    • Static magnetic erasing head
    • 静磁擦头
    • US3947891A
    • 1976-03-30
    • US509947
    • 1974-09-27
    • Makoto SaitoKengo MatsumotoKiyonori Hayakawa
    • Makoto SaitoKengo MatsumotoKiyonori Hayakawa
    • G11B5/03G11B23/00G11B5/12G11B5/27
    • G11B23/0007G11B5/03
    • The present invention relates to an erasing head for a magnetic recording apparatus using a static magnetic field. The erasing head consists of a plurality of magnetic poles having surfaces which confront the recording tape. The first and second poles have polarities opposite to each other. The first pole is arranged to engage a recording track along its full width and magnetizes it to a given polarity. The second pole is arranged to engage the upper half of the track and magnetize it to the opposite polarity. Each half track is magnetized to opposite polarities so that the distortion of output signals is reduced, when the signal is reproduced by a reproducing head engaging both half tracks.
    • 本发明涉及一种使用静磁场的磁记录装置的擦除头。 擦除头由具有面对记录带的表面的多个磁极组成。 第一和第二极具有彼此相反的极性。 第一极被布置成沿着其全宽接合记录轨道并将其磁化为给定的极性。 第二极被布置成接合轨道的上半部并将其磁化成相反的极性。 每个半轨道被磁化成相反的极性,从而当信号由再现头再现时,输出信号的失真减少,两个半轨迹都被复制。
    • 39. 发明授权
    • Optical transmitter outputting a plurality of signal light with a preset wavelength span
    • 光发射机以预设的波长跨度输出多个信号光
    • US08036534B2
    • 2011-10-11
    • US12320295
    • 2009-01-22
    • Kengo Matsumoto
    • Kengo Matsumoto
    • H04J14/02
    • H04J14/0221H04B10/506
    • An optical transmitter that multiplexes a plurality of signal light each having less chirp characteristic by the CML technique is disclosed. The optical transmitter comprises a plurality of optical modules, a plurality of TEC controllers each driving the TEC in the optical module, a de-multiplexer that de-multiplexes the output of respective modules, an etalon filter, and a monitoring unit that monitors the component of the signal light output from respective modules. The TEC controller controls the temperature of the LD in the module such that two emission wavelengths of the LD each corresponding to the ON level and the OFF level is set in both side of one of the critical wavelengths of the etalon filter where the transmittance thereof becomes a maximum.
    • 公开了一种通过CML技术复用具有较少啁啾特性的多个信号光的光发射机。 光发射机包括多个光模块,多个TEC控制器,每个TEC控制器驱动光模块中的TEC,解复用器,对多个模块的输出进行解复用,标准器滤波器以及监控组件 从各个模块输出的信号光。 TEC控制器控制模块中LD的温度,使得每个对应于ON电平和OFF电平的LD的两个发射波长被设置在标准具滤波器的一个临界波长的两侧,其中透射率变为 最大。