Study on Collision Avoidance Sensor using Chaos Laser Radar

Many laser radars have been studied as in-car radar. Generally, a distance is measured from delay time using either a periodic signal or a single pulse. But the received signal becomes to be buried in noise with increasing distance. Recently a chaos has been paid an attention and a chaos laser radar has been suggested. When a received signal is correlated with a transmitted one, it takes long processing time to perform repeatedly multiplications and integrations. A new type of chaos laser radar which processes by only an addition is proposed. It can quickly process and is comparatively strong for noise. A proto type of chaos laser radar is produced, in which a semiconductor laser with low output power below 1mW is used. This laser radar is able to measure the distance up to 80m. It is confirmed that the chaos laser radar is effective.