Theoretical research of one point side-pumped Yb3+ doped double clad fiber laser

A theoretical model of one point side-pumped Yb3+ doped double clad fiber laser was built up. By numerical analysis, the distribution of pump power and laser power along the fiber, and the relation between pump position and output power were obtained for forward pump, backward pump and bidirectional pump. The results show that pump position has little effects on laser power distribution and output power for bidirectional pump. This method can become a good choice for side-pumped double clad fiber laser.