It is an idea laser active medium for ( F2+ ) H color center in NaC1(OH- ) crystal.

晶体中的（F2+）H色心是理想的激光工作心。

Furthermore, an effective experimental scheme based on the TDFWM IL structure of LED is proposed for the observation of inter and intra band carrier relaxation rates in the active medium.

进而提出了用发光二极管结构的非相干光时延四波混频测量有源介质带间和带内载流子弛豫速率的有效方案。