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    • 2. 发明授权
    • Optical wavelength stabilization circuit, optical transmitter and optical transmission system
    • 光波长稳定电路,光发射机和光传输系统
    • US06693932B2
    • 2004-02-17
    • US09887737
    • 2001-06-22
    • Mitsuo AkashiYoichi HonzawaSunil SharmaShigeru Tokita
    • Mitsuo AkashiYoichi HonzawaSunil SharmaShigeru Tokita
    • H01S313
    • H01S5/0687H01S5/02415H01S5/042H01S5/06837
    • In the initial state, any wavelength variation of the output signal light with a change of the current injected into the laser is monitored with a wavelength meter, the quantity of wavelength variation is fed back to the wavelength compensation circuit, a compensation voltage for maintaining the wavelength in the initial stage is figured out, and that voltage is recorded into a memory element or the like. A configuration to add this compensation voltage to a comparator makes it possible to compensate for fluctuations of the characteristics of the optical splitter, wavelength filter and light receiving elements and thereby to obtain a stable optical wavelength. By constantly monitoring the injected current applied to the laser when the optical transmitter is in operation and giving a compensation voltage matching the current variation to the comparator, stabilization of the optical wavelength can be realized. By simulating in the initial state the operation of the laser after deterioration and providing in advance a compensation voltage for suppressing wavelength fluctuations, wavelength fluctuations after deterioration can be restrained.
    • 在初始状态下,用波长计监测注入到激光器中的电流变化的输出信号光的任何波长变化,波长变化量被反馈到波长补偿电路,用于维持 计算初始阶段的波长,将该电压记录到存储元件等中。 将补偿电压加到比较器的结构使得可以补偿光分路器,波长滤波器和光接收元件的特性波动,从而获得稳定的光波长。 通过在光发射机运行时不断监测施加到激光器的注入电流,并给出与比较器匹配的电流变化的补偿电压,可实现光波长的稳定。 通过在初始状态下模拟劣化后的激光器的动作,提前提供用于抑制波长波动的补偿电压,可以抑制劣化后的波长波动。
    • 3. 发明授权
    • Optical transmission module with light element temperature control
    • 光传输模块具有灯光温度控制
    • US06868235B2
    • 2005-03-15
    • US09946966
    • 2001-09-04
    • Shigeru TokitaTadashi HatanoFumihide MaedaYoichi HonzawaKatsumi Saito
    • Shigeru TokitaTadashi HatanoFumihide MaedaYoichi HonzawaKatsumi Saito
    • H01S5/024H04B10/04H04B10/06H04B10/08
    • H01S5/02415H01S5/06804
    • An optical transmitter receiver module and an apparatus incorporating the same module are provided, which realizes the reduction of power consumption and the enlargement of the operating temperature range. As an example, an optical transmitter module is provided which comprises a light emitting element to generate a light signal, a signal processing circuit to transmit an electrical signal to the light emitting element and a voltage regulating circuit to lower a power voltage so as to supply the signal processing circuit with a constant voltage, wherein the module is further provided with a current regulating circuit to shunt a part of a current to be supplied into the voltage regulating circuit from a power source so as to generate a control current and a temperature controller to receive the control current so as to control a temperature of the light emitting element, wherein the module is further provided with a temperature detector to detect the temperature of the light emitting element and a temperature controlling circuit to control the control current according to an electrical signal output by the temperature detector.
    • 提供了一种光发射机接收机模块和结合相同模块的装置,实现了功耗的降低和工作温度范围的扩大。 作为示例,提供了一种光发射器模块,其包括用于产生光信号的发光元件,将信号发送到发光元件的信号处理电路和用于降低电源电压的电压调节电路,以便供应 所述信号处理电路具有恒定电压,其中所述模块还设置有电流调节电路,以从电源分流要供给到所述电压调节电路的电流的一部分,以便产生控制电流和温度控制器 以接收控制电流以控制发光元件的温度,其中模块还设置有温度检测器以检测发光元件的温度和温度控制电路,以根据电气来控制控制电流 信号由温度检测器输出。