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The MOPA pulsed fiber laser has adjustable pulse width, wide frequency range, and more adjustable parameters during its processing. Therefore, more materials can be processed, the processing effect is better, the application is more extensive, and the market demand is growing every year.
Views: 25 Author: heyu Publish Time: 08-07-2020 Origin: fiber laser cutting machine
All fiber laser has many remarkable characteristics, which makes it show obvious advantages in many aspects.
1. The surface area / volume ratio of gain medium is large
Fiber laser uses optical fiber as gain medium, which has a large surface area / volume ratio, which makes it have very good heat dissipation performance. Therefore, in time for very high-power fiber lasers, the gain medium will not be damaged by heat. Generally, there is no need to take special heat dissipation measures for the gain medium. However, for other types of lasers, the heat dissipation of gain medium needs to be considered Therefore, this characteristic is unique to fiber lasers.
2. Excellent double waveguide confinement mechanism
High power all fiber laser adopts double cladding active fiber. The double clad fiber is a kind of double waveguide structure. High power multimode pump light is limited in the larger inner cladding, which provides conditions for the use of high-power and low-cost multimode pump light. The signal laser is generated and transmitted in the core with small diameter and circular symmetric waveguide structure Under the limitation, the signal laser can obtain ideal beam quality and tiny light spot, which is an important characteristic of all fiber laser with unique attraction. In high power laser, no laser can surpass it. Excellent beam quality and minimal light spot diameter are of great significance in laser application, which can make the optical system of subsequent application equipment simpler, smaller volume, longer working distance, smaller laser focusing spot, higher work efficiency, deeper processing depth, better processing quality, etc.
3. Inherent fully enclosed flexible optical path
The optical path of all fiber laser is composed of fiber and fiber components. The fiber and fiber components are connected by fiber fusion technology, and the whole optical path is completely enclosed in the fiber waveguide. Once the natural closed optical path is formed, it can form its own system without additional isolation measures and realize the isolation from the external environment. Because the fiber is small and has good flexibility, the optical path can be coiled and run through the small pipe. Therefore, the all fiber laser can work in a relatively harsh environment, and the output light can be transmitted through a narrow gap or along a small pipe for a long distance. These characteristics have great advantages in industrial application. The laser can not only adapt to the harsh working environment, but also make the laser far away from the light point. The laser can be introduced to the place which is difficult to reach before. It can be very easy to move and change the light point. The laser processing equipment design can be more flexible and so on.
4. The optical path is maintenance free
The optical path of all fiber laser is composed of optical fiber and optical fiber components. The optical fiber and optical fiber components are connected by optical fiber fusion technology. Therefore, once the optical path is formed, it will form a whole. Practice has proved that the connection structure and connection parameters formed in this way will remain stable for a long time. If the fiber and optical fiber components can have long-term stability, the whole optical path will be stable for a long time, No maintenance required. It should be specially pointed out that this maintenance free feature is not non maintainable and repairable. If necessary, the maintenance and repair of the whole optical path can also be carried out. Therefore, compared with the frequent maintenance and repair of gas and solid-state lasers, the maintenance free characteristics of all fiber laser are extremely excellent. Compared with the non maintainability of semiconductor lasers, all-optical laser has excellent maintenance free characteristics Fiber laser has obvious advantages in maintainability and maintainability.
5. Long life
Using a single wide emitting region semiconductor pump laser as the pump source of fiber laser, all fiber laser has the characteristics of long life. Therefore, it is technically feasible to produce a long life fiber laser with several hundred thousand hours.
6. Small size and light weight
Due to the fact that the optical path of all fiber laser can be coiled and the space occupied by the optical path is small, the pump laser can be installed dispersedly and has good heat dissipation characteristics. When the installation density is not high, air cooling can be used. When the installation density is high, only a small amount of water is needed to meet the heat dissipation requirements, Therefore, the volume of all fiber laser is smaller and lighter than that of gas and solid-state laser systems with the same output power.
7. Water saving, electricity saving and cost saving
Fiber laser has excellent thermal performance, high photoelectric efficiency, water-saving and power-saving. Especially important, it can be used without maintenance for a long time, which can save a lot of maintenance funds and practice, and improve work efficiency.
8. The cost has been continuously reduced
The optical path of all fiber laser consists of optical fiber and fiber components. Due to the availability of materials, the cost can be greatly reduced after the technology, product and market are mature. In addition to the optical path, the semiconductor pump laser is the main part of the cost of fiber laser. From the development history and experience of optical communication, with the development of technology and the continuous expansion of market capacity, it will be an inevitable trend to reduce the cost of semiconductor pump laser significantly.
