The use of lasers is very extensive. Due to the outstanding performance advantages of lasers, they are used in industry, agriculture, precision measurement and detection, communication and information processing, medical treatment, military and other aspects, and the effect is very obvious. Using the concentrated and extremely high energy of the laser, various materials can be processed, and hundreds of holes can be drilled on one needle;
Laser can cause stimulation, mutation, burning, vaporization and other effects on biological organisms, and can be used in medical and agricultural applications;
In the field of communications, an optical cable that uses laser beams to transmit signals can carry the amount of information equivalent to that carried by 20,000 telephone copper wires;
In addition to the military use of lasers for communications, night vision, early warning, ranging, etc., a variety of laser weapons and laser guided weapons have also been put into practical use.
It can be said that the market space for lasers is very large, and their applications will be more extensive in the future. Lasers are electronic products with high technology integration, so they are expensive. KangDing Thermal's radiator expert introduced the technology of laser heat sink.
There are generally three aspects to the composition of the heat source of the laser. Take fiber laser as an example. The heat sources of fiber lasers include:
High-power power supply heating; LD array heating (inclined efficiency of 50%), double-clad fiber material absorption heating and quantum loss heating, etc. The heat dissipation design should also be carried out according to the characteristics of the heat source, and the heat dissipation design of each sub-component should be carried out in a targeted manner, and finally a complete laser heat dissipation system will be formed. The laser heat sink design generally has four aspects: natural cooling technology, air-cooled heat dissipation technology, water-cooled heat dissipation technology, and disguised heat dissipation technology.
Natural cooling radiator technology. That is, a naturally cooled heat sink is installed on the heat source, and the heat of the heat source is taken away by the heat sink, and then the heat is naturally dissipated into the air. The natural cooling heat dissipation method is suitable for lower power lasers, and the natural cooling heat sink can meet the heat dissipation requirements.
Air cooling technology. The air-cooled heat dissipation technology is based on natural cooling with a fan. The fan is used to enhance the flow of air to achieve the purpose of taking away the heat of the radiator. Air-cooled heat sinks are generally designed as a base plate + fins. The base plate is close to the heat source, and the fin is close to the fan.
Water cooling technology. Water cooling has better heat dissipation effect and will not produce vibration side effects. Therefore, it is widely used in the heat dissipation of high-power lasers. The disadvantage is that it will increase the weight and volume of the laser system. Install a specially customized water-cooling plate on the heat source. The water-cooling plate is connected to the entire water-cooling heat dissipation system and connected to the external water-cooling machine to form a circulating system.
Disguised heat dissipation technology. Disguised heat dissipation is an extension of natural heat dissipation, that is, a copper or aluminum heat sink is installed on the heat source, and a heat pipe with a disguised heat conduction function is installed on the heat sink. It is connected to the shell or external radiator to direct and efficiently conduct the heat generated inside to the laser shell to achieve heat dissipation.