Wuhan Changjin Photonics

Wuhan Changjin Photonics makes specialty optical fibers in-house for fiber lasers and communication amplifiers and produces several rare-earth-doped fiber types in volume. The company develops, produces and sells these fibers while providing technical services, controlling the process from design and preform preparation through drawing to performance characterization. It also contributes to the localization of key materials for fiber lasers and communication amplifiers.

The firm mass-produces export-controlled ytterbium-doped fiber and high-power ytterbium-doped fiber above 6 kW for leading laser manufacturers, and produces ultra-broadband L-band erbium-doped fiber supporting China's 400G optical transmission networks. It is among the few domestic makers of erbium-ytterbium co-doped fiber and works with major LiDAR light source manufacturers. Its radiation-resistant rare-earth-doped fibers have passed verification for space laser communications.