Research On The Monitoring And Automatic Control Technology In Space Laser Transmission System

As the faster development of the laser technology and optical device and the improvement of communication distance and quality, optical communication had got more and more faster development based on its unique merits. The feasible problem has got solved and control technology of emissive system has been mature in the optical laser communication.The focus of this article is the automation controlling technology study of laser emissive technology in optical communication, mainly about the output optical power of semiconductor laser and temperature of emissive system. In this article, we analysis about all kinds of effective factors of the output optical power in the optical laser communication emissive system, and talk about the relationship between all kinds of factors and output optical power. According to the requirement to the control technology in optical laser emissive system, design the optical power self-controlling circuit and thermostatic controlling circuit reaching the related technology target. Using PD to detective technology, MUC to control the calculation, digital potentiometer to adjust the drive current, making the system can self-adjust the output optical power as the change of the factor in the entire circumstance ,ensure the steady of the output optical power, and even ensure above the communication quality level. The experimental results indicate that the system have achieve the requirement of specified technology target...