Efficient Raman shifting of picosecond pulses using BaWO4 crystal
Efficient Raman shifting of picosecond pulses using BaWO4 crystal
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DOI：
10.1016/s0030-4018(00)00575-7
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发表时间：
2000-04
影响因子：
2.4
通讯作者：
P. Černý;P. Zverev;H. Jelínková;T. Basiev
中科院分区：
文献类型：
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作者：
P. Černý;P. Zverev;H. Jelínková;T. Basiev
研究了新型BaWO_4拉曼晶体中皮秒脉冲的受激拉曼散射，并与已知的KGd（WO_4）_2和KY（WO_4）_2晶体中的受激拉曼散射进行了比较。利用锁模Nd：YAG激光器的一次和二次谐波输出作为泵浦源。由于瞬态行为，高值的BaWO 4稳态拉曼增益降低了2.5倍的皮秒泵浦脉冲（28和40 ps），但仍然高于在KGd（WO 4）2晶体。BaWO4在单通道布置中的最大第一和第二斯托克斯转换效率被测量为分别为30%和15%。时间脉冲长度的测量表明，第一斯托克斯脉冲是泵浦脉冲的两倍短。因此，钨酸钡可以被认为是一种独特的拉曼晶体，用于产生从纳秒到皮秒的各种泵浦脉冲持续时间的频移拉曼激光脉冲。
Stimulated Raman scattering of picosecond pulses was investigated in a new BaWO4Raman crystal and was compared with SRS in well known KGd(WO4)2and KY(WO4)2crystals. The first and second harmonic output of a mode-locked Nd:YAG laser system was used as a pump source. Due to transient behaviour, high value of BaWO4steady state Raman gain is reduced by a factor of 2.5 for picosecond pump pulses (28 and 40 ps) but remains still higher than that in KGd(WO4)2crystal. Maximum first and second Stokes conversion efficiencies for BaWO4in a single-pass arrangement were measured to be 30% and 15%, respectively. Measurements of a temporal pulse length showed that the first Stokes pulse was twice as short as the pump pulse. Barium tungstate can thus be considered as a unique Raman crystal for wide variety of pump pulse duration from nanoseconds to picoseconds for the generation of the frequency shifted Raman laser pulses.