Research On Adaptive Control Technique Of Laser Intensity Based On Liquid Crystal

With the world striding into the information time, we are also going through the unprecedented change. Undoubtedly, what promotes this process is the surprising progress of the information communication technology, especially the considerable progress of photo-communication technology. In the course of constant high-speed development of the photo-communication, the system tends to demand on more and more diversity to the performance of the mere device.This paper has introduced the principle of work and control technique of LCD's light beams in detail. It adopt the LCD spatial light modulator to replace the traditional attenuator, utilize the precision LCD drive power which based on AVR and CA-D1 digital camera to realize closed loop controlling .The molecule of LCD's arrangement changes for the function of additional voltage. It adjusts flexibly incidence laser's line polarization orientation, consequently realizes the adaptive control about the energy of laser in the polarization field, making the laser detector receive the stability energy of laser. Consequently it make the Signal Noise Ratio of work which light detector' track system steady. It makes the whole system achieve the higher track precision.