Features and advantages of all-fiber lasers

The all-fiber laser has many notable features, which makes it show obvious advantages in many aspects.

1. The gain medium has a large surface area/volume ratio

The fiber laser uses optical fiber as the 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 thermally damaged, and there is generally no need to take special heat dissipation measures for the gain medium. For other types of lasers, the heat dissipation of the gain medium needs to be considered. Therefore, This feature is unique to fiber lasers.

2. Excellent dual-waveguide confinement mechanism

The high-power all-fiber laser uses a double-clad active fiber. This double-clad fiber is a dual-waveguide structure with high power The multi-mode pump light is restricted to transmit in the larger inner cladding, which provides conditions for the use of high-power and cheap multi-mode pump light. The signal laser is generated in a fiber core with a circular symmetric waveguide structure with a small diameter. Transmission, under the limitation of the small core diameter fiber core waveguide, the signal laser can obtain the ideal beam quality and extremely small light spot. This is the unique and important feature of all-fiber lasers. Among high-power lasers, it is still No laser can surpass. Excellent beam quality and extremely small spot diameter are of great significance in laser applications, which can make the optical system of subsequent application equipment simpler, smaller in size, longer working distance, smaller laser focusing spot, and more efficient High, the processing depth is deeper, the processing quality is better, and so on.

3. Inherent fully enclosed flexible optical path

The optical path of the all-fiber laser is entirely composed of optical fiber and optical fiber components. The optical fiber and optical fiber components are connected by fiber fusion splicing technology, and the entire optical path is completely Enclosed in a fiber optic waveguide. Once this natural fully enclosed light path is formed, it can form a system without additional isolation measures to achieve isolation from the external environment. Because the optical fiber is small and flexible, the optical path can be coiled and traveled along small pipes. Therefore, the all-fiber laser can work in a relatively harsh environment, and the output light can pass through narrow gaps or travel long distances along small pipes. transmission. These features have great advantages in industrial applications. The laser can not only adapt to the harsher working environment, but also keep the laser away from the light-emitting point. The laser can be introduced to places that were difficult to reach before, and it is very easy to move and change the light-emitting point. The processing point shares a laser, which can make the design of laser processing equipment more flexible and so on.

4. The optical path is maintenance-free

The optical path of the all-fiber laser is entirely composed of optical fibers and optical fiber components. The optical fiber and optical fiber components are connected by fiber fusion splicing technology. Therefore, once the optical path is Formation means forming 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 optical fiber and the optical fiber components themselves can have long-term stability, the entire optical path will be stable for a long time without maintenance. It needs to be particularly pointed out that this maintenance-free feature is not impossible to maintain and repair. If necessary, the entire optical path can also be maintained and repaired. Therefore, it is comparable to the frequent maintenance and repair of gas and solid lasers. In comparison, the maintenance-free characteristics of the optical path of the all-fiber laser are exceptional. Compared with the non-repairability of the semiconductor laser, the maintainability and repairability of the all-fiber laser has obvious advantages.

5. Long lifespan

Using a single wide light-emitting area semiconductor pump laser as the pump source of the fiber laser, the all-fiber laser has the characteristics of long life, so the production has dozens of Ten thousand hours of long-life fiber lasers are technically feasible.

6. Small size and light weight

As the optical path of the all-fiber laser can be coiled, the optical path occupies a small space, in the case of using a single wide luminous area semiconductor pump laser as the pump source Pump lasers can be installed dispersedly and have 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 the all-fiber laser is smaller and lighter than the gas and solid-state laser system of the same output power.

7. Water-saving, power-saving and cost-saving

Fiber laser has excellent thermal performance, high photoelectric efficiency, water-saving and power-saving, and it is especially important that it can be used for long-term maintenance-free. It can save a lot of maintenance expenses and practice, and improve work efficiency.

8. Costs continue to decrease

The optical path of the all-fiber laser is all composed of fibers and fiber components. Due to the easy availability of materials, it can be greatly reduced after the technology, products and market are mature. cost. In addition to the optical path, semiconductor pump lasers are the main part of the cost of fiber lasers. From the development history and experience of optical communications, with the development of technology and the continuous expansion of market capacity, the cost of semiconductor pump lasers has been greatly reduced. Will become an inevitable trend.