(1) Department of Physics, University of Science and Technology of China, 230026 Hefei, China;(2) Department of Physics, University of Science and Technology of Hong Kong, Hong Kong, China
Abstract:
Conclusion The optimum wavelength of Nd3+-doped double-clad fiber laser or amplifier made in China is near 830 nm. The efficiency of Nd3+-doped double-clad fiber devices pumped by 820-nm laser is low due to ESA. In order to increase the photochemical stability of the outer cladding, the material of the outer cladding must be advanced.