A highly Tm-doped lead germanate glass fiber is developed using the rod-in-tube method. The ~2 μm laser beam quality of the fiber is ~1.5. The lead germanate composite fiber jumpers are homemade for all the fiber laser investigations. When core is pumped by a 1590 nm Yb/Er fiber laser, a maximum laser output of 313 mW is achieved at a 670 mW pump power, and the corresponding slope efficiency is ~52.8%. Moreover, by using a 2 cmlong lead germanate fiber as the gain medium, a 33 mW 1942 nm Tm laser is also demonstrated. A highly Tm-doped lead germanate glass fiber is developed using the rod-in-tube method. The ~ 2 μm laser beam quality of the fiber is ~ 1.5. The lead germanate composite fiber jumpers are homemade for all the fiber laser investigations. When The core is pumped by a 1590 nm Yb / Er fiber laser, a maximum laser output of 313 mW is achieved at a 670 mW pump power, and the corresponding slope efficiency is ~ 52.8%. Furthermore, by using a 2 cmlong lead germanate fiber as the gain medium, a 33 mW 1942 nm Tm laser is also demonstrated.