In the early days, the lasers used in industrial processing that we are familiar with were usually infrared lasers (wavelength of about 1 m) and
ultraviolet lasers (wavelength below 400 nm).
In recent years, with the rapid development of my country's photovoltaic industry and lithium battery industry, green lasers (wavelength 510–
560 nm) as a new popular laser has been continuously promoted and applied in the photovoltaic and lithium battery industries and has begun
to be known in the industry. The commercialization of green lasers in the field of industrial processing has also made great progress.
1. Development of China's green laser market
The earliest companies in the world to deploy and promote green laser technology are Trumpf of Germany and IPG of the United States, which
are also the most advanced companies in green laser technology in the world. Trumpf of Germany and IPG of the United States can obtain
ultra-high-power green light outputs of more than 3 kW and 1 kW, respectively, through solid disk laser technology and fiber laser technology.
With the development of green laser technology in my country in recent years, many companies have emerged in my country that have
mastered the research, development, production and manufacturing technology of green lasers, and domestic green lasers have
gradually began to step onto the stage of industrial laser processing.
According to public market data, in the field of fiber lasers, Wuhan Ruike Fiber Laser Technology Co., Ltd., Shenzhen JPT Optoelectronics Co.,
Ltd., Shenzhen Gongda Laser Co., Ltd., Wuhan Anyang Laser Technology Co., Ltd., and Wuhan Guangzhi Technology Co., Ltd. all publicly
introduce fiber-green laser products on their official websites.
In the field of solid lasers, Inno Laser Technology Co., Ltd., Suzhou Yinggu Laser Co., Ltd., Wuhan Huari Precision Laser Co., Ltd., Logan
Laser Technology (Wuhan) Co., Ltd., etc. also publicly discloses solid green laser products.
According to the data collected by researchers from visits and surveys of green laser manufacturers and their upstream and downstream
related companies, the market size of green lasers in my country is as follows: From 2018 to 2022, the annual shipment of fiber green lasers in
China is roughly 400–600 units, and the main product is pulsed fiber green lasers, with annual sales of roughly 100–140 million. Domestic
Companies have a low market share, and the market is mainly monopolized by foreign companies. In 2023, the shipment volume of domestic
Fiber green lasers will be around 800 units, and the main product will still be pulsed fiber green lasers, with annual sales of about 150 million
yuan. Among them, the shipment volume of domestic green lasers will be around 500 units, and the sales volume of domestic green lasers will
be 90 million to 100 million yuan, due to the price advantage of domestic green laser products over foreign green laser products. In 2023,
Although the shipment volume of domestic fiber green lasers will increase faster than that in 2022, the overall annual sales volume will not
increase significantly compared with 2022.
From 2019 to 2023, the annual shipment volume of solid green lasers in China will be 300–500 units. Domestic solid-green lasers are mainly
low-power solid pulse green lasers and those from foreign companies are mainly high-power solid continuous green lasers. The overall
annual sales volume is around 100–140 million yuan, and the shipment volume of domestic companies accounts for a large proportion, with
annual shipments of about 200–300 units, but the unit price is relatively low. The sales of solid green lasers by domestic enterprises account
for a small proportion of total sales. Although foreign enterprises have smaller shipments, their unit prices are higher. Therefore, the sales of
Solid green lasers of foreign enterprises account for a high proportion of total sales.
With the continuous penetration of green lasers in the photovoltaic, lithium battery, and semiconductor industries, as well as the continuous
promotion and application in new fields such as 3D printing and aerospace, it is expected that in the next three years, the market size of
Domestic green lasers will continue to maintain an annual growth rate of 20–30%, and the domestic substitution development of green lasers
will still have a broad market space.
2. Industrial application of green lasers
Due to their short-wavelength working characteristics, green lasers have very important application needs in the processing of high-reflective
materials such as copper and aluminum and are also indispensable tools in many cutting-edge scientific research fields. For example, green
Lasers are often used in hot industries such as solar cell scribing, doping, 3C electronics, and semiconductor copper foil cutting and welding.
lithium battery welding, wafer annealing, and 3D printing.
1. Application of pulsed green fiber laser in copper foil cutting
A pulsed green laser is used for cutting FDC lines. The minimum line width at the fuse position can be 150 mm. The cutting is smooth and the
Cutting efficiency is ≥1000mm/s. The bottom film is not applied during cutting.
2. Application of pulsed green fiber laser in photovoltaic doping
A pulsed green laser is used for photovoltaic doping. The energy distribution is more uniform and the pulse control is more stable.
3. Application of continuous green fiber laser in copper foil welding
A continuous green laser is used for copper welding. The welding is stable. The absorption rate of copper to green light is about 40%. There is
There is no spatter during the welding process and the heat effect is small.
4. Application of continuous green fiber laser in lithium battery welding
A continuous green laser is used for welding large cylindrical lithium batteries. The yield can reach more than 95%.
5. Application of continuous green fiber laser in metal 3D printing
A continuous green laser is used for 3D printing of high-reflective materials such as copper and titanium alloys, especially pure copper. At
present, the density of pure copper 3D-printed samples can reach more than 99.5%, and the material parameters of mechanical strength,
The thermal conductivity and electrical conductivity of the printed samples are equivalent to those of die-cast samples.