Double-end pump polarization-maintaining fiber laser

The double-end pumped polarizationmaintaining fiber laser was studied by using two semiconductor lasers LD1 and LD2. The output powers of the fiber laser were tested by using LD1 and LD2 single-end pumping and double-end pumping. The output power of double-end pumping was compared with the power sum of LD1 and LD2 single-end pumping, which shows that double-end pumping can enhance the pumping efficiency and output power of the fiber laser. The output power of the double-end pumped fiber laser was 6.5 W, and the output polarization degree was 0.5.