一种基于虚拟仪器的自动偏压控制方案

An electro-optic modulator bias control scheme based on virtual instrument

在光纤通信与光纤传感系统中,电光调制器(EOM)起着十分重要的作用。但由于受温度、波长、光功率变化和偏振等因素的影响,EOM工作点缓慢漂移,使整个系统工作不稳定,必须对其进行偏压控制。文章利用锁相放大器的原理结合虚拟仪器技术提出了一种简便的自动偏压控制方案,并进行了初步的实验,实验结果验证了理论分析的正确性和使用虚拟仪器技术进行偏压控制的可行性。

Electro-optic modulator （EOM） plays a very important role in fiber-optic communication systems and distributed fiber-optic sensor systems. However, EOM＇s job characteristics are slowly changes over time due to charging effects, or variations in temperature, wavelength, optical power, or polarization. Therefore drift compensation is absolutely necessary. In this paper, a bias voltage control system is proposed using lock-in amplifier combined with virtual instrument technology. Experimental results verify the correctness of theoretical analysis and the feasibility of using virtual instrument technology in bias control.