A control system design for the optimal bias point of external modulator
A control system design for the optimal bias point of external modulator
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DOI：
10.1109/icemi.2009.5274134
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发表时间：
2009-10
期刊：
影响因子：
--
通讯作者：
Yinan Chen;Xiaoqing Zhang;Dong Li
中科院分区：
文献类型：
--
作者：
Yinan Chen;Xiaoqing Zhang;Dong Li
研究了直流偏置电压对x切y导马赫-曾德尔强度调制器输出光功率的影响，得到了直流偏置电压与调制器输出光功率的余弦函数方程。该调制器工作在最佳偏置点Vπ/2（±10mV）附近的近似线性区域。考虑到近似线性区域的变化范围是无穷小的，设计了高精度数字信号处理（DSP）控制系统，实现了对最优偏置点的精确控制，其控制精度可达到1mV。
This paper deals with the effects of direct current bias voltage to X-cut y conduction Mach-Zehnder intensity modulator's export optical power, and achieves a cosine function equation of direct current bias voltage versus export optical power of modulator. The modulator works on an approximate linear region nearby the optimal bias point Vπ/2(± 10mV). Considering the approximate linear region's range of variation is infinitesimal, a high-accuracy digital signal processing (DSP) control system has been designed which achieves precise control for the optimal bias point, in addition, its control precision can be attained 1mV.