在高功率激光作用下,拉曼池窗口及其膜层很容易被激光损坏。设计了一种新型的无固体窗口的拉曼池,利用安装在拉曼池两端的两个快门来取代通常的固体窗口,拉曼池内充有与环境气体密度接近的混合气体,在快门打开后的一定时间内,气体扩散不占主导地位,从而实现拉曼转换。研究了窗口气体流动对受激拉曼散射的影响。

The window and its coating of the Raman cell are easily damaged by the laser beam with very high power laser. A novel Raman cell without solid windows is designed. Two gas switches are used at two ends of the Raman cell, a gas mixture with a density very close to the air is used as Raman medium. This gas mixture will not diffuse very fast after the gas switch is open. So the Raman conversion can be obtained without solid windows. The effects of gas flow during the gas window operation on the Stimulated Raman scattering are investigated.