强制0.3 - ps组合散射激光脉冲在水晶Ca - 515 nm波长= SUB = - 3 = / SUB(区- = SUB - 4 = / SUB -) = SUB - 2 = - = / SUB - Ca = SUB = - = 0.27 / SUB - Sr - SUB = 0.3 = / SUB = -区= SUB - 4 = / SUB -) = SUB - 2 = - = / SUB
И. О. Киняевский, В. И. Ковалев, Анатолий Валериевич Корибут, Е. Э. Дунаева, Н.С. Семин, А. А. Ионин
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引用次数: 0
摘要
利用泵浦聚焦的单通道方案，对超短可见激光脉冲进行光谱转换，评价了srs -活性钙/正钒酸锶晶体Ca3(VO4)2和Ca2.7Sr0.3(VO4)2的前景。在波长为515 nm、持续时间为0.3 ps的~3J入射激光脉冲中，在长度为1.3 cm的Ca2.7Sr0.3(VO4)2晶体样品中获得的Stokes分量的能量转换效率可达~3.5%，频率位移约为~850 cm - 1。同时，在透射辐射光谱中，Stokes分量的幅值达到泵浦波长幅值的1/3。在相同的条件下，Ca3(VO4)2晶体中根本没有检测到SRS。结果表明，所观察到的差异可以用两种晶体中双光子吸收的差异引起的泵浦脉冲衰减来解释。
Вынужденное комбинационное рассеяние 0.3-ps лазерных импульсов с длиной волны 515 nm в кристаллах Ca-=SUB=-3-=/SUB=-(VO-=SUB=-4-=/SUB=-)-=SUB=-2-=/SUB=- и Ca-=SUB=-0.27-=/SUB=-Sr-=SUB=-0.3-=/SUB=-(VO-=SUB=-4-=/SUB=-)-=SUB=-2-=/SUB=-
The prospects of SRS-active calcium/strontium orthovanadate crystals, Ca3(VO4)2 and Ca2.7Sr0.3(VO4)2, for spectral conversion of ultrashort visible-range laser pulses evaluated in a single-pass scheme with pump focusing into the samples. For the ~3 J incident laser pulses of 0.3 ps duration at wavelength of 515 nm the energy conversion efficiency of up to ~3.5% to the Stokes component shifted in frequency by ~850 cm–1 obtained in a 1.3 cm long sample of Ca2.7Sr0.3(VO4)2 crystal. Simultaneously, in the transmitted radiation spectrum the amplitude of Stokes component reached 1/3 of the amplitude at the pump wavelength. Under the same conditions, SRS in a Ca3(VO4)2 crystal was not detected at all. It was shown that the observed differences can be explained by the attenuation of pump pulse due to difference in two-photon absorption in these crystals.
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