数值分析交叉驰豫对掺Tm3+硅基光纤激光器的作用

用数值分析的方法，分析了高掺杂Tm^3＋硅基光纤激光器中离子间的交叉驰豫提高光纤激光器效率的机理．随着Tm^3＋掺杂浓度的提高，Tm^3＋离子间的交叉驰豫作用增强，从而提高激光器的效率、降低反转阈值，在790nm激光泵浦时最大量子效率可达到2，分析结果表明高掺杂浓度可有效缩短掺杂光纤长度，减少硅基质对2μm附近激光的高吸收．

Numerical Analysis Cross Relaxation Contribution to the Tm3+-Doped Silica Fiber Lasers

Identify the cross relaxation(CR) process that is important to boost the operation of Tm~(3+)-doped silica fiber laser using the method of numeral analysis.With the Tm~(3+) concentration increasing,the threshold of population reverse decreases,the slope efficiency increases,and the maximum quantum efficiency even get to 2 pumped at 790 nm,because of the cross relaxation reinforcing.Using heavily Tm~(3+)-doped double-clad fiber,the fiber length can be shortened very much,so the absorption of host is reduced promptly.