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Invention Grant
CN1960087B 用于使激光源工作稳定的方法和系统 有权 转让

用于使激光源工作稳定的方法和系统
Abstract:
本发明公开了一种克服由温度和/或老化所引起的漂移而使来自激光源(1)的输出光功率稳定的系统，所述输出光功率具有目标平均值附近的目标光学调制幅度，所述系统包括：功率传感器(2)，用于感知来自激光源(1)的输出光功率，并产生指示所述输出光功率的功率传感信号(3)，以及控制器(5)，所述控制器(5)对功率传感信号敏感，并设置为通过下述方式对激光源(1)的偏置电流(IB)和调制电流(IM)进行选择性调整(6、7)：对来自激光源(1)的实际平均输出光功率与目标平均值之间的误差进行检测，将误差与给定的误差阈值(ΔP)进行比较，以及当误差达到阈值时，对偏置电流(IB)和调制电流(IM)进行调整，以使来自激光源(1)的输出光功率回到所述目标平均值(Ptarget)和所述目标平均值(Ptarget)附近的所述目标光学调制幅度(OMAtarget)。
Abstract(English):

A system for stabilizing an output optical power from a laser source (1) against drifts induced by temperature and/or aging, said output optical power including a target optical modulation amplitude around a target average value includes: a power sensor (2) for sensing the output optical power from the laser source (1) and generating a power sensing signal (3) indicative thereof, and a controller (5) sensitive to the power sensing signal and configured for selectively adjusting the bias (IB) and modulation (IM) currents of the laser source by (6, 7): detecting an error between the actual average output optical power from the laser source (1) and the target average value, comparing the error against a given error threshold (Delta P), and when the error reaches the threshold adjusting the bias (IB) and modulation (IM) currents to bring the output optical power from the laser source (1) back to the target average value (Ptarget) and the target optical modulation amplitude (OMAtarget) around the target average value (Ptarget).

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