On March 14, 2018, during the 2018 Munich Shanghai Optical Expo, Hengtong Fiber unveiled a new line of high-performance erbium-doped laser fibers designed for applications in laser marking, material processing, and medical lasers. These fibers represent cutting-edge advancements in specialty fiber technology, showcasing the company's strong technical expertise and industry leadership.
According to market analysts, the global fiber laser market is expected to grow steadily, becoming one of the most important industrial laser technologies. The application scope has expanded significantly, covering areas such as laser marking, cutting, welding, cladding, metal 3D printing, medicine, and more. By 2021, the compound annual growth rate (CAGR) is projected to reach around 12%. This growth is driving increased demand for upstream components like erbium-doped fiber, a key raw material for fiber laser manufacturers. However, for many years, domestic companies have relied heavily on imported erbium-doped fibers.
Fiber lasers are essential in various industries, as they generate and emit laser beams that are critical for numerous applications. In the consumer sector, they are used for marking products like water bottles, providing clear, durable, and tamper-resistant labels. In manufacturing, they enable precise cutting of steel plates, improving production efficiency. In defense, they play a role in space confrontation and combat operations.
Dr. Chen Wei, Chief Engineer at Hengtong Optical Fiber, explained the differences between traditional optical fibers and dual-clad erbium-doped fiber (DC-YDF). DC-YDF is specifically designed for applications such as laser marking, material processing, and medical lasers. Unlike conventional passive fibers that only transmit light, erbium-doped fiber is an active medium that can both transmit and amplify light. This makes it a crucial component in high-power laser systems.
He added that dual-clad erbium-doped fiber is a core element in fiber lasers and amplifiers. Its manufacturing process is complex and technically demanding, resulting in high-value products. It is often referred to as the "spire of the pyramid" in the fiber industry, requiring significant investment and technological expertise. Hengtong’s product utilizes advanced rare earth chelate gas-phase doping technology combined with MCVD rod technology, enabling all deposition processes to be completed in a single step without disassembly. This reduces production time and minimizes environmental impact while ensuring uniform distribution of doping ions.
The rare earth chelate gas-phase doping method also allows for in-situ deposition, offering simple operation, good repeatability, and the ability to produce large-sized erbium-doped mandrel rods. This enables the creation of large preforms when paired with quartz cladding, ensuring consistent fiber quality and batch-to-batch reliability. As a result, Hengtong is capable of producing kilowatt-class laser fibers, addressing a major need in China’s energy optoelectronics sector.
Dr. Chen emphasized that Hengtong places a strong emphasis on R&D for new specialty optical fibers. The company has established a dedicated research center with capabilities in preform manufacturing, fiber drawing, testing, and technical support. Currently, Hengtong offers a range of products including erbium-doped fiber, data center fiber, sensing fiber, and marine fiber. The dual-clad erbium-doped fiber, along with supporting passive transmission fiber GDF, demonstrates the company's ability to mass-produce YDF and develop customized Solutions.
Looking ahead, Hengtong aims to continue innovating, seize emerging opportunities, and build a high-tech special fiber industry. The company is committed to accelerating the internationalization of Chinese fiber laser technology.
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