Lasers are widely used in all walks of life because of their extremely advantageous characteristics, including laser cutting, industrial manufacturing, food and medical care, aerospace, etc. Lasers are mainly used to emit lasers. The common laser classification at present is divided into gas lasers, solid-state lasers, semiconductor lasers, fiber lasers and liquid lasers according to the working medium. In recent years, free electron lasers have also been developed.
Gas laser
Gas lasers use gas as a device for producing laser light. It consists of three main parts: activation gas in the discharge tube, a resonant cavity composed of a pair of mirrors, and an excitation source. The gas laser has a simple structure, low cost, convenient operation, uniform working medium, good beam quality and can work continuously for a long time and relatively stable time. It is the most diverse and widely used laser.
Solid-state laser
A laser using solid laser material as a working substance. The working medium is a small amount of activated ions uniformly incorporated into crystals or glasses as matrix materials. Solid-state lasers are characterized by small size, easy to use and large output power. The output wavelength of solid lasers is short and has a high coupling efficiency with metal, which is conducive to metal surface absorption and has good metal processing performance. Therefore, solid-state lasers are widely used in metal processing fields such as automobiles, metallurgy, and mechanical manufacturing.
Semiconductor laser
Semiconductor lasers, also known as laser diodes, are lasers that use semiconductor materials as working substances. Due to differences in material structure, the specific process of laser generation in different types is relatively special. Semiconductor diode lasers are the most practical and important type of lasers. It is small in size, has a long life, and can be pumped by a simple injection of current. Its operating voltage and current are compatible with the integrated circuit, so it can be integrated with it monolithic. And it can also be directly current modulated with frequencies up to GHz to obtain high-speed modulated laser output. Due to these advantages, semiconductor diode lasers have been widely used in laser communication, medical beauty, stage lighting, optical storage, laser engraving and printing, ranging and radar.
Fiber laser
Fiber laser refers to a laser that uses rare earth element-doped glass fibers as the gain medium. Fiber lasers can be developed based on fiber amplifiers: under the action of pump light, high power density is easily formed in the optical fiber, causing the laser energy level of the laser working substance to "particle number inversion". When a positive feedback loop (forming a resonant cavity) is appropriately added, a laser oscillation output can be formed. Fiber lasers have a wide range of applications, including laser fiber communication, laser space long-distance communication, industrial shipbuilding, automobile manufacturing, laser engraving, laser marking, laser cutting, printing and roller making, military and national defense security, medical equipment, as pumping sources for other lasers, etc.
Liquid laser
Liquid lasers are relatively unique lasers. Liquid lasers are also called dye lasers, because the activation substances of this type of laser are solutions formed by the dissolving of certain organic dyes in liquids such as ethanol, methanol or water.
Distinguish according to the working method
It is divided into continuous laser and pulse laser.
Distinguish according to basic working principles
Various lasers are similar, including three parts: pump source, optical resonant cavity and gain medium.
It is a semiconductor laser manufacturer integrating R&D, production and sales. It can provide you with professional laser application solutions and customize your products according to your needs. If you need it, you can contact us anytime.
