DP GROUP, founded in 2016, offer professional laser solutions and sheet metal fabrication machinery. Headquartered in Hong Kong, we operate three factories in mainland China:
DPMach (Dongguan): Specializes in laser cutting, welding, and marking.
DGDY (Dongguan): Focuses on press brake machines with advanced Panel Bender technology.
DPQG (Foshan): Manufactures large tube laser cutting machines for pipes up to 800mm in diameter and 30 meters lenth.
DP GROUP, founded in 2016, offer professional laser solutions and sheet metal fabrication machinery. Headquartered in Hong Kong, we operate three factories in mainland China:
DPMach (Dongguan): Specializes in laser cutting, welding, and marking.
DGDY (Dongguan): Focuses on press brake machines with advanced Panel Bender technology.
DPQG (Foshan): Manufactures large tube laser cutting machines for pipes up to 800mm in diameter and 30 meters lenth.
Views: 0 Author: hu Publish Time: 2021-09-28 Origin: dapeng
Fiber lasers are currently a hot topic in the industrial laser world. Due to its combination of high reliability, high efficiency, low cost and high beam quality, fiber lasers are expected to lead a revolution in the laser industry. The development of high-brightness laser diodes and optical fiber technology driven by the rapid development of the telecommunications industry has potentially promoted the advancement of fiber lasers. Although we have not yet seen the changes triggered by fiber lasers, laser diodes and optical fibers are undergoing a revolution, and fiber lasers are precisely the most striking bright spot in this revolution.
There are two types of laser diodes used as pump sources: array emission type and single emission type. Generally, the array emitting laser diode rod is 1cm long and contains 50 100 m laser bars, and the output power of each laser bar to free space is about 1W. Using array emitting laser diodes, the output power density is as high as 50W/cm, which also poses a challenge to the heat dissipation problem. But for the pump crystal, the spatial distribution of the output beam of the array-emitting laser diode is ideal and the price is moderate. In order to achieve high brightness, the laser light output by one or more laser rods can be coupled through an optical fiber, but it requires complex free space optical technology and high cost, so it can only be applied in a small area. The rated service life of industrial laser rods is usually 10,000 to 20,000 hours.
In contrast, a single-emitter laser diode outputs laser light from a 100?m laser bar, directly coupled into a separate package, and has an output power of up to 10W. For laser diodes with an average service life of more than 100,000 hours, special packaging is only due to economic considerations. To obtain higher power density, only semiconductor laser diodes with higher power can be used. Combining the high brightness and reliability of fiber coupling organically in the 900-980nm waveband, coupled with a moderate price, these will provide an ideal platform for diode-pumped fiber lasers, and this waveband is as early as the ninth century. It was commercialized in the telecommunications field in the early ten's.
Solid-state lasers traditionally use doped, rod-shaped crystals as gain media. Recent technological advances have taken the longitudinal dimension of the laser rod to an extreme. Disk lasers usually use ultra-short laser rods, whose purpose is to reduce the thermal lens effect to obtain high-quality beam output. In contrast, fiber lasers can achieve higher-quality beam output by extending the longitudinal dimension in a single-mode waveguide without restriction. However, it is more difficult to obtain high-performance ultra-short laser rods and optical fibers compared to commonly used laser rods that have been commercially available.
Because high-brightness laser diodes and optical fibers are different from traditional laser industrial components, the traditional industrial laser community not only considers fiber lasers a challenge, but also a threat. In contrast, telecommunications equipment suppliers have a more moderate attitude towards the two technologies. After all, fiber lasers are similar in structure to erbium-doped fiber amplifiers (EDFA), but with more mirrors. Thousands of EDFAs are deployed in telecommunications networks every year and operate with a very low failure rate. Their expected continuous operation time is as long as 12 years. With the increase in demand and technological progress, the price of EDFA is steadily increasing. decline. Companies committed to the fiberization of lasers also hope that new industrial lasers will produce the same effect.
Currently, fiber lasers have been widely adopted by many emerging applications. Optical fiber is the most significant gain medium. High-brightness pump light transmits through optical fiber and has low injection loss. The airtight transmission of optical fiber to light can not only ensure the effective conversion of pump energy, but also realize the direct transmission of light to the workpiece. Each part of the entire platform is modularized, and the docking and assembly between the modules are clear at a glance. In contrast, the current platforms based on traditional lasers are not only complicated in optical paths, but also sensitive to the environment.
Currently, fiber laser components are developing more rapidly than in the past. Optical fiber is the most suitable medium for light transmission found so far. When performing three-dimensional processing on the workpiece, the remote operation of the laser can be realized by using the optical fiber. Using the waveguide properties of optical fiber as a carrier to replace free space transmission is a new technological innovation. On January 20-25, 2007, at the Western Optoelectronics Expo in San Jose, USA, JDSU Company demonstrated the FCD488 blue laser, which connects the pump laser diode and the nonlinear medium through two fiber-coupled butterfly packages. The rapid progress of laser diodes in terms of brightness, output power and reliability has led to a rapid decline in the price per watt of output. In many areas where traditional gas and solid-state lasers were once the most popular, now you can see diodes based on fiber coupling. The figure of a pump laser. For these fiber-coupled diode lasers, can they not be called fiber lasers just because they lack a few meters of gain fiber?
Industrial lasers are increasingly using optical fibers to achieve nonlinear conversion and Q-switching functions, which were previously realized by crystals. Fiber lasers can currently produce yellow, green and even white light. The new Q-switched fiber laser can achieve high repetition rate pulse output in the near-infrared and ultraviolet bands. Therefore, in the field of marking and material processing, fiber lasers are a huge challenge to traditional Nd:YAG and CO2 lasers.
Therefore, we should not understand the fiber laser in a narrow sense, but should understand it from a new perspective. Combining the single-emission pump source and the optical fiber organically can realize many refreshing functions, and finally realize the functions of the diode-pumped solid-state laser. No matter what type of laser you use, the possibility of containing optical fiber inside it will increase.