提出了一种新颖而又简单的参考光功率校准方法，该方法具有无需鉴频的优点。在每一个频率点处探测电光调制器输出总功率与预定参考光功率的偏差，将其作为反馈信号来控制该频率点对应的微波源输出功率，从而使输出参考光的功率得到校准。从理论上分析了该方法的可行性，并通过模拟和实验进行了验证。实验结果表明，对布里渊光时域反射仪中的参考光功率进行校准后，不同频率点参考光功率与预定功率的最大误差减小为未校准前的1/3。

A novel and simple reference light power calibration method is proposed, which has the advantage of frequency discriminator. The difference between light power of the total output of electro-optic modulator and the intended reference light power is detected at each frequency point, and then used as the feedback signal to control the output power of microwave source to calibrate the reference light power. The feasibility of the method is analyzed theoretically and verified through simulations and experiments. It is demonstrated that, after the calibration, the maximum error between the reference light power and intended power is reduced to one-third of that observed before calibration.