Active Optical Fiber (AOF) As A Fiber Laser Gain Medium

Ytterbium-doped fiber and erbium-doped fiber for active fiber representative products, in recent years, along with technological advances, China's highly doped concentration of ytterbium-doped fiber and other high-performance fiber optic market space continues to expand for the development of active optical fiber industry to provide favorable conditions.
Active optical fiber (AOF), also known as active optical fiber, gain optical fiber, refers to the optical fiber with a light source, able to convert electrical signals into optical signals. Active optical fiber belongs to the special optical fiber, compared with the traditional optical fiber, it has good flexibility, can achieve high-speed transmission, low energy consumption, long transmission distance and other advantages, in rail transportation, communication systems, aerospace, laser processing and other fields are widely used.
Active optical fiber types are extremely rich. According to different parameters, active optical fiber can be divided into few-mode active optical fiber, single-mode active optical fiber, multi-mode active optical fiber and large core diameter large mode field active optical fiber, etc.; according to the different doped rare earth elements, can be divided into thulium-doped fiber, neodymium-doped fiber, holmium-doped optical fiber, erbium-doped fiber, ytterbium-doped fiber, thulium-holmium co-doped optical fiber and so on. Ytterbium-doped optical fiber and erbium-doped optical fiber are representative products of active optical fiber. In recent years, along with technological advances, China's high doping concentration ytterbium-doped optical fiber and other high-performance optical fiber market space continues to expand, providing favorable conditions for the development of active optical fiber industry.
The report shows that the fiber laser for the laser market mainstream products, with the accelerated development of China's manufacturing industry, fiber laser market share continues to increase. Active fiber for fiber laser gain medium, occupying nearly 15% of its production cost. Benefit from the increasingly strong demand for applications, China's active fiber market size continues to grow, in 2022 to reach nearly 5 billion yuan.
Global active fiber manufacturers include Canada CorActive, the United States Nufern, the United States OFS, the United States Newport, Denmark NTK and Finland Liekki company. In the early stage of industry development, by the high technical barriers, production costs and other factors, China's active optical fiber is highly dependent on imports. In recent years, benefiting from national policy support and technological advances, the number of active optical fiber manufacturers in China has increased, and its market localization process continues to accelerate. Changfei optical fiber, Chuangxin laser and Rike laser for China's active optical fiber manufacturers.
Changfei optical fiber focuses on optical fiber, optical cable and fiber optic prefabricated rod research and development, production and sales, for China and even the world's special optical fiber on behalf of the enterprise. 2018 Changfei optical fiber and Chuangxin laser to reach a strategic partnership, joint research and development of active optical fiber, the company has active optical fiber mass production strength, product sales ranked first in the industry. According to the half-year report of Changfei Fiber Optics Enterprise, in the first half of 2023, the company's fiber optic and prefabricated rod business achieved revenue of 1.86 billion yuan.
Industry analysts said, active optical fiber as a special fiber, in the fiber laser production process more applications, the future along with the increasingly strong downstream demand, China's active optical fiber industry development trend will continue to improve. Compared with overseas developed countries, China's active optical fiber industry started late, but the momentum of development is rapid, local enterprises have its mass production strength.