Optical memory is an essential optical element for optical communication and computing system. Here the authors propose an optical scheme for developing a quaternary memory unit associated with wavelength encoding technique and based on Mach Zhender Interferometer based semiconductor optical amplifier (MZI-SOA) optical switches in symmetric configuration mode. Here the symmetry is introduced by injecting same biasing current to two SOAs of a MZI-SOA optical switch.

中文翻译：

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使用MZI-SOA的对称配置的全光频率编码四元存储单元

光学存储器是用于光学通信和计算系统的基本光学元件。在此，作者提出了一种光学方案，该方案用于开发与波长编码技术相关联的四元存储单元，并基于对称配置模式下基于马赫·贞德干涉仪的半导体光放大器（MZI-SOA）光开关。在此，通过向MZI-SOA光开关的两个SOA注入相同的偏置电流来引入对称性。