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对用于光学向量矩阵乘法器的16路阵列光源和驱动电路进行了系统的研究。提出了采用商用分布式反馈激光器(DFB)和16路光纤阵列耦合的方式构造阵列光源模块,并且在驱动电路中设计了功率反馈自校正调节算法,解决了由于当前激光器制造工艺条件的限制而造成的各路激光器之间的阈值电流和P-I转换效率等参数差异问题。实现了光源系统各个通道间的输入向量数据和输出光强之间的一致性映射。实验结果证明,所研究开发的光源阵列不仅成本低,而且数据源信号的高频响应性能良好,保证了光学向量矩阵乘法器运算性能的稳定性和准确性。
The 16-channel array light source and driving circuit used in the optical vector matrix multiplier are systematically studied. The paper proposes a method of constructing an array light source module by using a commercially available distributed feedback laser (DFB) and a 16-way optical fiber array coupling method, and a power feedback self-tuning regulation algorithm is designed in the driving circuit to solve the problems caused by current laser manufacturing process conditions Of the various lasers between the threshold current and PI conversion efficiency parameters such as differences. The consistent mapping between input vector data and output light intensity is achieved for each channel of the light source system. The experimental results show that the proposed light source array is not only low cost, but also high frequency response of the data source signal, which ensures the stability and accuracy of the computing performance of optical vector matrix multipliers.