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| 粉末倍频纵向位置效应的研究 |
| Research on longitudinal position effect of powder |
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| DOI: |
| 中文关键词: 粉末倍频 纵向探测距离 信号溢出 |
| 英文关键词:powder SHG longitudinal detection distance signal overflow |
| 基金项目: |
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| 中文摘要: |
| 基于Kurtz粉末倍频测试原理,在固定的基频光波入射方向下,通过改变探头相对于样品的纵向距离,对粉末倍频(SHG)纵向位置效应进行了研究。实验结果及数据拟合表明,在一定的粉末粒径和粉末堆积厚度下,碘酸钾晶体粉末和尿素晶体粉末的相对倍频光I2ω均随探测距离S成指数衰减,碘酸钾粉末与尿素粉末的二次谐波信号的相对大小不随探测距离变化,且在5.8%的标准误差范围内,测得碘酸钾粉末倍频效应是尿素粉末倍频效应的6.8倍。 |
| 英文摘要: |
| Based on the Kurtz theory, the longitudinal position effect of powder second harmonic generation (SHG) is studied experimentally. In this experiment, the incident light with fundamental frequency is fixed in settled direction, but the longitudinal detection distance between the probe and the samples is adjustable. The experimental results and the corresponding data fitting show that for certain size and certain accumulative thickness of the powder, the relative SHG intensities I2ω of both the KIO3 powder and the urea powder decay exponentially as increasing the longitudinal detection distance, while the relative size of the SHG of the two kinds of powders keeps invariant. Moreover, it is obtained that the SHG effect of the former is 6.8 times in that of the later within the standard error of 5.8%. |
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