The red laser pointer is easier to make, because there is a laser diode that generates this wavelength, so its structure is the simplest, basically just a diode powered by a battery. Wavelength is about 600 nanometers, there are mature technology, there are mature semiconductor process materials.

all solid-state blue laser light source is expected to be widely used in many fields, such as digital to analog converter, laser and brush technology, laser medicine, biochemical technology, material science and optical communication.

Visible light is the part of the electromagnetic spectrum that human eyes can see and feel. In this range, electromagnetic radiation is called visible light, or simply light. The wavelength range that human eyes can feel is generally 390nm - 700nm.

According to the analysis of laser generation principle, laser is under the action of "excitation source", the number of high level electrons of atoms increases, and after staying for a very short time, they jump to low level and emit laser at the same time.It is not hard to see that there must be many, many atoms of matter that can emit laser light under the action of "excitation source".

As metal processing technology continues to advance and user requirements continue to increase, lasers need to innovate in terms of cost and energy efficiency as well as laser system performance.For non-ferrous metals, the absorption of light energy increases with the decrease of light wave length.For example, the light absorption of copper at the wavelength below 500nm will increase by more than 50% than infrared light, so blue semiconductor laser is more suitable for the processing of copper.

532 nanometers (nm) or green wavelengths can control the heat balance of these small and highly conductive components while ensuring that they are not overheated or underheated.

A laser pointer is a tool that uses a laser as an indication.Can indicate the length is far, can replace the pointer and other indicating tools, can also be used in the display of slides, such as PPT, as an indication.Current laser Pointers are mostly red.

There is only one pump module inside the laser, it is called a single-mode laser, and multiple pump modules are combined together to allow multiple pump beams to enter the active fiber through a beam combiner, so that higher power can be obtained.

Lasers have many properties: First, lasers are monochromatic, or single-frequency. Second, laser light is coherent light. The characteristic of coherent light is that all its light waves are synchronized, and the whole beam of light is like a "wave train". Again, the laser is highly concentrated, which means that it has to travel a long distance before it becomes dispersed or converged.

Thick and thin plates of automobile body, automobile parts, lithium batteries, pacemakers, sealed relays and other sealed devices, as well as various devices that do not allow welding pollution and deformation. Currently used lasers are YAG lasers, CO2 lasers and semiconductor pumped lasers.