Because semiconductor laser has the advantages of simple structure, small size, long life, easy modulation and low price, it is widely used in military fields such as laser guidance tracking, laser radar, laser fuze, laser ranging, laser communication power supply, laser simulation weapon. Laser sighting alarm, laser communication and laser gyro.
Because semiconductor laser has the advantages of simple structure, small size, long life, easy modulation and low price, it is widely used in military fields such as laser guidance tracking, laser radar, laser fuze, laser ranging, laser communication power supply, laser simulation weapon. Laser sighting alarm, laser communication and laser gyro. At present, the developed countries in the world attach great importance to the development of high-power semiconductor lasers and their application in the military.
A semiconductor laser fuze is an optical fuze that belongs to the technical category of active proximity fuzes. The laser fuze detects the target by laser, processes and calculates the laser echo information, determines the target, calculates the explosion point, and detonates at the optimal position. Once the bomb is not captured or lost and the fuze fails, the self-explosive agency can detonate the projectile. Semiconductor laser fuzes are the most successful applications of laser detection technology in weapon systems.
Laser guidance: It allows the missile to fly in the laser beam until it destroys the target.
Semiconductor laser guidance has been used for ground-to-air missiles, ground-to-ground missiles, and the like. Laser guidance tracking has a very wide range of applications in the military. One of the methods of laser guidance is driving guidance, also known as laser beam guidance. The laser emitting system from the guidance station emits the coded modulated laser beam to the space according to a certain law, and the center line of the beam is aimed at the target; the missile flying in the beam, when its position deviates from the center of the beam, the laser receiving at the tail of the missile The laser signal is detected by the device. After the information processing, the bomb solving device calculates the size and direction of the missile from the center line to form a control signal. Then, the autopilot manipulates the corresponding mechanism of the missile to fly along the beam center. Until the target is destroyed. Another laser guidance method is fiber guidance. The sensor information is transmitted to the missile controller through a released optical fiber, and the displayed image is observed and sent back through the same optical fiber to control the missile.
Laser ranging: mainly used in anti-tank weapons as well as aviation, aerospace and other fields. The range finder uses a semiconductor laser as a light source with concealment and a slight improvement. It can also measure the distance between vehicles and display it digitally, giving an alarm when the required safety factor is below. Semiconductor laser night vision and laser night vision monitors have also received important applications. The light source of the semiconductor laser array active night vision device is concealed and the array power is high, which can increase the monitoring distance to 1 km. If it is equipped with scanning and image display devices, it can become a laser night vision monitor. When using it to monitor the target, the target's activity can be transmitted to the command post via fiber optic cable in due course. Choosing a longer suitable wavelength can be an all-weather monitor.
Lidar: Compared with CO2 laser radar, the laser array of semiconductor laser array is small in size, simple in structure, short in wavelength, high in precision, with various imaging functions and real-time image processing functions, including comprehensive imaging, image tracking and Automatic identification of targets, etc. It can be used to monitor targets, measure atmospheric moisture, clouds, and air pollution. It can also be used as an aircraft collision avoidance radar, airborne shear wind detection coherent light radar, precise location of incoming targets, and terrain for helicopters and cruise missiles. Tracking, etc. Semiconductor laser radars are mainly LDs and arrays with wavelengths from 820 to 850 nm.
Laser simulation: Laser simulation is a new type of military training and exercise technology based on semiconductor lasers. The purpose of simulating any weapon feature is achieved by adjusting the laser beam, period and range. Weapon simulation mainly uses 904 nm semiconductor lasers, using eye-safe lasers as the basis for tactical training systems, originally called Laser Engagement Systems (LES). The development of the system began in 1973 and its feasibility has been confirmed. The microprocessor technology was introduced in 1974, and LES developed into a multi-function laser engagement system (MILES). In the same year, Syracuse Electro-optical Systems accepted a full-scale development contract for the MILES project, providing the Army with more than 80,000 sets of equipment for ground operations simulation. In addition, the company has developed air-to-ground combat systems and MILES air defense prototypes. At present, the United States, Britain, and Sweden (the three countries) sell MILESII/SAWE systems; NATO countries, Israel, Argentina, Russia, and China are developing such systems.
Deep sea optical communication: Semiconductor laser is an ideal light source, which has the advantages of anti-interference and good confidentiality. The laser-to-submarine communication source blue-green light is the communication window of seawater (460-540 nm), and the penetration depth is about 300 ft. The submarine can communicate with satellite or aircraft carrier with blue-green light. A multi-frequency semiconductor high power laser array (wavelength between 920 and 1080 nm) is one such source.
Semiconductor laser aiming and warning: There are two types of aiming: One is based on a GaAs laser that emits infrared lasers. Soldiers need to wear night vision goggles to see the laser spot on the target to solve the problem of night-time soldiers' aiming and shooting. The laser is aimed at a semiconductor laser that emits red laser and visible light. The FA- 4 laser sight introduced by American Laser Equipment in the 1980s weighs only 99 g and is 11.4 cm long. In order to meet the detection requirements of lasers of different wavelengths and tunable lasers, the working band of laser warnings has been continuously expanded, and the angular resolution has been continuously improved.
Semiconductor laser communication: Semiconductor lasers require only a small telescope and a low transmission power in satellite communication technology to achieve free space transmission of light and obtain extremely high data rate transmission. Laser communication technology can be used for mutual communication between orbiting satellites and for satellite and ground stations.
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