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    • 7. 发明申请
    • Optical transmission module and wavelength control method of optical transmission module
    • 光传输模块和光传输模块的波长控制方法
    • US20110158643A1
    • 2011-06-30
    • US12926866
    • 2010-12-14
    • Toru Yamazaki
    • Toru Yamazaki
    • H04B10/08
    • H04B10/572
    • An optical transmission module includes a variable wavelength light source; an alternating current adding unit that adds an alternating current to a drive current to the variable wavelength light source; a first detector to detect optical power of an output light; a filter to input the output light from the variable wavelength light source in which transmission wavelength periodically increases and decreases; a second detector to detect optical power of transmitted light transmitted through the filter; an extraction unit to extract a wavelength fluctuation component of the output light based on the optical power of the output light and the optical power of the transmitted light; a phase comparison unit to compare a phase of the wavelength fluctuation component with a phase of the alternating current; and a wavelength controller to control a wavelength of the output light by controlling a temperature of the variable wavelength light source.
    • 光传输模块包括可变波长光源; 交流电加法单元,其向所述可变波长光源添加与驱动电流的交流电流; 检测输出光的光功率的第一检测器; 输入来自可变波长光源的输出光的滤波器,其中透射波长周期性地增加和减少; 第二检测器,用于检测透射过滤器的透射光的光功率; 提取单元,用于基于输出光的光功率和透射光的光功率来提取输出光的波长变动分量; 相位比较单元,用于将波长波动分量的相位与交流电的相位进行比较; 以及波长控制器,通过控制可变波长光源的温度来控制输出光的波长。
    • 9. 发明授权
    • Optical transmitting device
    • 光传输设备
    • US07245837B2
    • 2007-07-17
    • US10368346
    • 2003-02-20
    • Hisaya SakamotoToru YamazakiRumiko Tashiro
    • Hisaya SakamotoToru YamazakiRumiko Tashiro
    • H04B10/12
    • H04B10/25137H04B10/505
    • A demultiplex unit demultiplexes the optical output of a Mach-Zehnder optical modulator and inputs the demultiplexed optical output to a wavelength detection unit. The wavelength detection unit detects the wavelength deviations in the ascending or descending part of the optical signal and inputs the wavelength deviations to a detection unit. The detection unit detects the sign and magnitude of chirping in the magnitude of wavelength deviation and inputs the sign and magnitude of chirping to a driving voltage control unit. The driving voltage control unit compares the detected sign and amount of chirping with the target sign and magnitude of chirping, and a driving voltage generation circuit provides the Mach-Zehnder optical modulator with a suitable driving voltage.
    • 解复用单元解复用马赫 - 曾德尔光调制器的光输出,并将解复用的光输出输入到波长检测单元。 波长检测单元检测光信号的上升或下降部分的波长偏差,并将波长偏差输入到检测单元。 检测单元在波长偏差的大小中检测啁啾的符号和大小,并将啁啾的符号和幅度输入到驱动电压控制单元。 驱动电压控制单元将检测到的啁啾符号和目标符号与啁啾幅度进行比较,驱动电压产生电路为马赫 - 曾德尔光调制器提供合适的驱动电压。