SLC系统中自动增益程控的主放设计

The Design of the Auto gain Program Controlled Main Amplifier in the Sysem of the Submarine Laser Communication

激光对潜通信（ＳＬＣ）系统中，传输信道的衰减特性导致水下接收端的光功率随外界环境变化而大幅波动，且十分微弱。为此利用可调增益运放ＡＤ６０３，设计自动增益程控的放大单元作为光接收电路的主放级，为接收系统提供宽动态范围与高增益，从而满足ＳＬＣ信道要求。

In the SLC system, the nature of attenuation for transmitting channel leads to the fact that optical power, in seawater where the receiving end is, will vary greatly with the external environment change and therefore be very weak. So we adopt the variable gain amplifier AD603 to design an auto gain program controlled amplifying unit as the main amplifier for the optical receiving circuit. This design can bring high voltage gain and broad dynamic range for the receiving system and meet the requirement of the SLC channel.