Theoretical Analysis And Comparison Of Tm-Doped Fiber Lasers With Different Pump Bands

Modeling of Tm-doped fiber lasers pumped with 793 nm, 1.6 mu m and 1.9 mu m is presented and compared. Output performance of three different pump schemes with active fiber length, pump power and output reflectivity is investigated. Numerical simulation shows that, with 793 nm pump, the cross relaxation process is of vital importance for high efficient operation of Tm- doped fiber laser. And, 1.9 mu m pump scheme is more likely to offer even higher output compared with 793 nm pump and 1.6 mu m pump.