基于DAC阵列的光交叉芯片控制驱动系统

Control Drive System of Optical Crossbar Chip Based on DAC Array

为标定光交叉芯片驱动电压,控制光交叉芯片实现光路由功能,提出并搭建了基于多通道DAC(Digital to Analog Converter)阵列的控制驱动电路系统。系统主要由控制系统模块、多路驱动电路模块及上位机控制模块构成。控制电路和驱动电路具有调校简单、可双极性输出、输出路数多、加电精确度较高的特点,解决了当前驱动电路工作繁琐、加电极性单一、加电路数少、精度差的问题。上位机控制模块除了可控制驱动电路施加控制电压外,还可接收来自数据采集装置采集到的光功率信号作为控制驱动系统的反馈信号。通过分析控制电压与光功率之间的关系,可得到最佳的光交叉芯片控制驱动电压。系统测试实验结果表明,该系统能提供高精确度的双极性驱动电压,有效地对光交叉芯片进行驱动。可在较短的时间内标定出光开关的控制电压,完全可以满足有源光交叉芯片控制中对驱动电压的需求。该系统在光交叉芯片控制方面具有一定的应用价值。

The optical crossbar chip is the core device used to realize optical routing in the field of optical communication.A control and driver system is designed based on a multi-channel DAC(Digital to Analog Converter)array to achieve optical routing through the optical crossbar chip.The system consists of a control system module,a multi-channel drive circuit module,and a host computer control module.This system has several advantages,including simple adjustment,bipolar output,more output channels,and higher power accuracy.It solves the problems of the current driving circuit,such as complex operation,single power polarity,fewer output channels,and poor accuracy.The host computer control module can control the driving circuit to apply the control voltage and receive the optical power signal collected from the data acquisition device as the feedback signal of the control driving system.By analyzing the relationship between the control voltage and the received optical power,the best control driving voltage of the optical crossbar chip can be obtained.The system test results show that the system can provide high-precision bipolar driving voltage to effectively drive the optical crossbar chip and can calibrate the control voltage of the optical switch in a short time,fully meeting the requirements of the driving voltage in the active optical crossbar chip control.We believe that this system could be useful for optical crossbar chip control.