Variable optical attenuator control method and system based on automatic calibration and intelligent learning

Abstract

The invention provides a variable optical attenuator control method and system based on automatic calibration and intelligent learning. The control method comprises an automatic attenuation calibration process, a rapid attenuation control process and an intelligent self-learning process. During the automatic attenuation calibration process, a to-be-calibrated queue is determined, an attenuation value of a variable optical attenuator is set to be a minimum value, a parameter setting value of the variable optical attenuator is increased gradually by a minimum step size, and a corresponding calibration parameter value of the to-be-calibrated attenuation value is obtained. During the rapid attenuation control process, a position of a target attenuation value in a calibrated queue is searched and confirmed, a corresponding target setting parameter value of a target attenuation value is calculated, and setting and fine tuning are carried out based on a result. And during the intelligent self-learning process, a current actual light attenuation value is obtained based on sampling and correction is carried out when determination is needed. According to the invention, an automatic attenuation calibration way without manual intervention is provided; long-term influences caused by factors of an environment and device aging and the like can be eliminated based on intelligent self-learning control; and the control precision is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of adjustable optical attenuator control, in particular to an adjustable optical attenuator control method and system based on automatic calibration and intelligent learning. Background technique [0002] At present, the control methods of the adjustable optical attenuator mainly include two kinds of close-loop control of gradual approximation and open-loop control according to the calibration value. [0003] The basic steps of step-by-step closed-loop control are as follows: [0004] Step 1: Sampling the optical path where the adjustable optical attenuator is located ( figure 1 ) to obtain the actual optical power attenuation value; figure 1 Among them, VOA stands for variable optical attenuator (variable optical attenuator), PD stands for photodetector (photodetector), PD1 marks the photodetector before the VOA device, and PD2 marks the photodetector behind the VOA device; [0005] Step 2: Calculate the...

AI Technical Summary

Problems solved by technology

[0009] 1. The time required for adjustment is not fixed. When the target attenuation value is far from the actual attenuation value, the adjustment time is long and the efficiency is low

[0010] 2. Adjustment step size, stability, adjustment time, precision, etc. are mutually restricted, and need to be weighed repeatedly, sometimes it is difficult to obtain better results at the same time

[0014] 1. The long-term accuracy and stability are poor, and the additional errors caused by temperature and device aging cannot be corrected;

[0015] 2. The higher the accuracy requirement of the adjustment, the larger the scale of the attenuation comparison table, and the greater the labor and memory required

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