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通过测量外加电压下电光晶体的相位延迟来获取半波电压.基于双折射晶体劈的偏光干涉法,将通过电光晶体后的偏振光相位延迟量转化为干涉条纹的平移,通过定位暗纹位置进行精密的线性测量.实验结果表明:偏光干涉法测量铌酸锂晶体相位延迟的测量准确度为4.4×10-3 rad,所测量铌酸锂晶体的半波电压为480.0V,其测量误差为0.10%,远小于极值法0.96%的测量误差.偏光干涉法光路结构简单、测量准确度高、测量结果不受光功率波动的影响,且电光晶体相位延迟量的测量范围不受限制.
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光子学报
ISSN: 1004-4213
CN: 61-1235/O4
Year: 2015
Issue: 09
Volume: 44
Page: 98-103
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JCR@2023
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