论文标题
长波长红外等离子体压缩的种子源
Seed source for plasma compression in the long wavelength infrared
论文作者
论文摘要
两种颜色激光脉冲用于形成空气等离子体，并产生适合向后拉曼二氧化碳激光脉冲的落后拉曼扩增的种子的宽带红外辐射。从8-14微米的大气窗口中的宽带辐射。红外辐射的表征是使用长波长光栅光谱仪在其输入平面上接受电离激光丝的特征。通过搅动驱动脉冲，可以大大提高LWIR产量。单向脉冲传播模拟表明，这部分是由于非线性折射率对脉冲持续时间的依赖性。
Two color laser pulses are used to form an air plasma and generate broadband infrared radiation suitable as a seed for backward Raman amplification of CO2 laser pulses. Broadband radiation in the atmospheric window from 8-14 microns is observed. The infrared radiation is characterized using a long wavelength grating spectrometer specially designed to accept an ionizing laser filament at its input plane. The LWIR yield is greatly enhanced by chirping the drive pulse. Unidirectional pulse propagation simulations suggest that this is due in part to the dependence of the nonlinear refractive index on the pulse duration.
