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    Optical transmitters
    1.
    发明公开
    Optical transmitters 失效
    光学发射器

    公开(公告)号：EP0539038A3

    公开(公告)日：1993-09-22

    申请号：EP92308925.4

    申请日：1992-09-30

    申请人： NORTHERN TELECOM LIMITED

    发明人： Visocchi, Pasqualino Michael

    IPC分类号： H04B10/14

    CPC分类号： H04B10/504 ,  H01S5/06832 ,  H04B10/564

    摘要： An optical transmitter including a laser diode (10) and achieving automatic slope variation compensation thereof. A photodetector (12) detects the output optical signal of the laser diode. One control loop (1) maintains the mean optical signal power output constant by adjusting the bias current Ib appropriately. Another control loop (2) adjusts the modulation current Imod to maintain the a.c. optical signal power constant. This is achieved by determining a voltage V2 corresponding to the mean a.c. optical signal power by rectification and comparison with a reference Vref2 to produce an error signal ΔV2. The a.c. optical signal power is thus used to indicate a reduction in slope efficiency.

    Optical transmitters
    3.
    发明公开
    Optical transmitters 失效
    Optische发信人。

    公开(公告)号：EP0539038A2

    公开(公告)日：1993-04-28

    申请号：EP92308925.4

    申请日：1992-09-30

    申请人： NORTHERN TELECOM LIMITED

    发明人： Visocchi, Pasqualino Michael

    IPC分类号： H04B10/14

    CPC分类号： H04B10/504 ,  H01S5/06832 ,  H04B10/564

    摘要： An optical transmitter including a laser diode (10) and achieving automatic slope variation compensation thereof. A photodetector (12) detects the output optical signal of the laser diode. One control loop (1) maintains the mean optical signal power output constant by adjusting the bias current Ib appropriately. Another control loop (2) adjusts the modulation current Imod to maintain the a.c. optical signal power constant. This is achieved by determining a voltage V2 corresponding to the mean a.c. optical signal power by rectification and comparison with a reference Vref2 to produce an error signal ΔV2. The a.c. optical signal power is thus used to indicate a reduction in slope efficiency.

    摘要翻译： 一种包括激光二极管（10）并实现其自动斜率变化补偿的光发射机。 光电检测器（12）检测激光二极管的输出光信号。 一个控制回路（1）通过适当地调整偏置电流Ib来保持平均光信号功率输出恒定。 另一个控制回路（2）调节调制电流Imod以保持交流电流。 光信号功率常数。 这是通过确定对应于平均交流电压的电压V2来实现的。 光信号功率通过整流并与参考Vref2进行比较以产生误差信号WV2。 a.c. 因此，光信号功率用于表示斜率效率的降低。