随着激光技术及量子通信技术的不断发展,声光调制器已经成为多个领域的重要器件。衍射效率和任意偏振光偏振保持能力成为声光调制器的重要指标。通过对声光调制器的衍射效率进行理论分析和实验研究,提出了提升声光衍射效率的理论方法,并设计了一种任意偏振光可偏振保持的正反馈声光调制器系统。经实验验证,该声光调制系统能显著提高声光调制器的衍射效率,且在量子通信领域中可保证任意偏振光的保偏传输。研究结果为光纤耦合声光调制器以及基于声光调制器的量子器件的研究提供了参考。

With the development of laser technology and quantum communication technology, an acousto-optic modulator has become an important device in many fields. The diffraction efficiency and polarization maintaining ability are important indexes of an acousto-optic modulator. In this paper, through the theoretical and experimental investigation of the diffraction efficiency of an acousto-optic modulator, we propose a theoretical method to improve the acousto-optic diffraction efficiency and design a positive feedback acousto-optic modulation system, which can make the polarization of any arbitrarily polarized light maintained. The experimental results show that this acousto-optic modulation system can significantly enhance the diffraction efficiency of the acousto-optic modulator and guarantee the polarization maintaining of any arbitrarily polarized light during propagation in the field of quantum communications. The research results provide a reference for the research of optical fiber coupled acousto-optic modulators and quantum devices based on acousto-optic modulators.