After 50 years of mastering electromagnetic wave technology, humans have developed radio radar technology. In the following 20 years, due to the rapid development of laser and optoelectronic technology, people can apply the special electromagnetic wave of green laser pointer to radar and develop into laser radar.
Lidar has made great progress in many aspects such as directionality, stability, resolution and detection distance. It has been widely used in the field of people's livelihood, especially intelligent networked vehicles, intelligent robots, automatic guided vehicles, virtual reality, and enhanced Reality, etc., the market is very broad.
The traditional green laser pointer radar consists of a large number of optical components, which are bulky, costly and expensive. With the rapid development of silicon-based optoelectronic integration technology, silicon-based photonics technology has been widely studied, and thousands of optoelectronic devices can be integrated on one chip. This technology is suitable for making light-emitting modules of laser radar, called light. Control the phased array.
The optical control phased array chip fabricated by silicon-based optoelectronic integration technology works in the optical communication band. Compared with the traditional devices working in the visible and near-infrared bands, this working band is safer for the human eye and is beneficial to the laser. Radar products enter the field of people's livelihood. At the same time, because the green laser pointer electronic technology is fully compatible with integrated circuit technology, the beam scanning device and the control integrated circuit can be integrated on a single chip, which is beneficial to realize intelligent control and neural network integration.
Today, the mainstream of automotive laser radar is still the mechanical green laser pointer radar, but it is difficult to meet the large-scale, low-cost, car-level requirements of the automatic driving popularization. Therefore, solid-state laser radar has become the next development form of automotive laser radar, and the key technology of light-controlled phased array technology will be vigorously developed.