The frequency conversion of Ti:Sapphire laser second harmonic pulses into two-color emission using a tandem of BaWO 4 Raman crystals was experimentally demonstrated with an internal efficiency of ∼17%. The output emission contained symmetrical Stokes and anti-Stokes spectral components separated by 902 cm −1 with a full-width half-maximum bandwidth of ≥110 cm −1 each. The applicability of this two-color emission was numerically verified for the production of longwave infrared ultrashort pulses suitable for seeding a high-pressure CO 2 laser amplifier via difference frequency generation in LiGaS 2 crystal.

中文翻译：

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通过472 nm 0.11 ps激光脉冲泵浦的BaWO 4晶体的双色发射，以将其频率转换为长波IR域

使用串联的BaWO 4拉曼晶体将Ti：蓝宝石激光二次谐波的频率转换为双色发射，内部效率约为17％。输出发射包含对称的Stokes和反Stokes频谱分量，它们之间的距离为902 cm -1，全宽半最大带宽分别≥110 cm -1。通过数值验证了这两种颜色发射的适用性，以产生适合通过LiGaS 2晶体中的差频产生来播种高压CO 2激光放大器的长波红外超短脉冲。