激光器腔镜限制导致的转换效率降低和增益带宽不足

This is affected by the incident pump light entering the cavity, which reduces the pump light entering the cavity and ultimately reduces the conversion efficiency of the entire laser. The second disadvantage is due to the limitation of the cavity mirror. In general, the gain bandwidth of the gain medium formed by doping rare earth elements in the glass body is 50 nm. Even if the medium film is designed separately for the cavity mirror to make the output half-height full-width spectrum reach the range of 5 nm to 10 nm, it is still unable to meet the requirement for the quality of the entire gain linewidth.