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    • 4. 发明授权
    • Laser diode driver system
    • 激光二极管驱动系统
    • US5675600A
    • 1997-10-07
    • US661829
    • 1996-06-11
    • Satoshi YamamotoTetsuya FukayaShuhei KawauchiMasahiko Yamashita
    • Satoshi YamamotoTetsuya FukayaShuhei KawauchiMasahiko Yamashita
    • H01S5/042H01S5/06H01S5/068H01S5/0683H01S3/00
    • H01S5/0683
    • A laser diode driver solves problems of APC (Auto Power Control) group, a LD monitor group, and an optical output waveform, which occur when reducing adjusting resistors constituted in a conventional laser diode drive. The laser diode driver includes a laser diode for emitting a light output corresponding to an input signal, a light-receipt element for receiving a part of the light output emitted from the laser diode and outputting a light-receipt signal current corresponding to the received part of the light output, a driver circuit operatively coupled to the laser diode for supplying a driving current, which drives the laser diode to emit the light output, a duty variable controller for varying duty of a waveform of the driving current, an optical output stabilization loop for detecting a peak value corresponding to the light-receipt current outputted from the light-receipt element, comparing the detected peak value with a first reference value, and controlling the driver circuit to output a size of the driving current according to the difference between the detected peak value and the first reference value, and a duty stabilization loop for detecting an average value corresponding to the light-receipt signal current outputted from the light-receipt element, comparing the detected average with a second reference value, and controlling the duty variable controller to output the duty of the waveform of the driving current according to the difference between the detected average value and the second reference value.
    • 激光二极管驱动器可以解决APC(自动功率控制)组,LD监视器组以及减少常规激光二极管驱动中构成的调整电阻时出现的光输出波形的问题。 激光二极管驱动器包括用于发射对应于输入信号的光输出的激光二极管,用于接收从激光二极管发射的光输出的一部分的光接收元件,并输出与接收部分相对应的光接收信号电流 的光输出的驱动电路,可操作地耦合到激光二极管的驱动器电路,用于提供驱动激光二极管发射光输出的驱动电流,用于改变驱动电流波形占空比的占空比变量控制器,光输出稳定 用于检测与从光接收元件输出的光接收电流对应的峰值,将检测到的峰值与第一参考值进行比较,并且控制驱动电路根据第一参考值输出驱动电流的大小, 检测到的峰值和第一参考值,以及用于检测对应于light-rec的平均值的占空比稳定循环 从光接收元件输出的eipt信号电流,将检测到的平均值与第二参考值进行比较,并且根据检测到的平均值和第二参考值之间的差来控制占空比变量控制器输出驱动电流的波形的占空比 参考值。