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1.引言可变光衰减器(Variable Optical Attenuator,VOA)是光纤通信中一种重要的光无源器件,通过衰减传输光功率来实现对信号的实时控制,可与光波分复用器
1. Introduction Variable Optical Attenuator (VOA) is an important optical passive device in optical fiber communication. It realizes real-time control of signals by attenuating transmitted optical power. It can be used with optical wavelength division multiplexer