Laser Properties Of Nd3+/Yb(3+)Co-Doped Glass Fiber Around 1 Mu M

The interest in Nd3+/Yb3+ co-doping was initially motivated by the discovery of Nd3+ -> Th3+ energy transfer in 1964, which profoundly influenced the motivation for subsequent research. Here, however, we propose a new mechanism based on an 808 nm and 975 nm dual-pumping scheme, in which the effect of Nd3+ -> Yb3+ energy transfer process is negligible. Gain spectrum modulation and its application in tunable dual-wavelength lasers around 1 mu m were demonstrated in a 30-cm-long Nd3+/Yb3+ co-doped silica glass fiber. In addition, interesting laser efficiency improvements, thermal performance improvements, and even photodarkening resistance behavior were observed. This work broadens the knowledge of Nd3+/Yb3+ co-doping and may provide useful insights for exploring co-doping with rare-earth ions. (C) 2021 Optical Society of America