| 铌酸锂电光调Q晶体漏光现象的研究 |
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| 引用本文： | 商继芳,杨金凤,郝好山,李清连,张玲,孙军.铌酸锂电光调Q晶体漏光现象的研究[J].人工晶体学报,2020,49(6):1034-1039. |
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| 作者姓名： | 商继芳 杨金凤 郝好山 李清连 张玲 孙军 |
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| 作者单位： | 河南工程学院,河南省电子陶瓷材料与应用重点实验室,郑州 451191;河南工程学院理学院,郑州 451191;南开大学泰达应用物理研究院,天津 300457;南开大学物理科学学院,天津 300071 |
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| 基金项目： | 国家自然科学基金(51902087, 61705059);河南省科技攻关项目(202102210023);河南省青年人才托举工程项目(2020HYTP004);河南省电子陶瓷材料与应用重点实验室开放课题 |
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| 摘 要： | 针对铌酸锂(LN)电光调Q开关性能一致性差、退压式调Q时无法完全关断光路的问题进行了系统研究。在闪光灯泵浦Nd∶YAG激光系统中,对多块LN电光调Q开关的退压式电光调Q性能进行了对比测试,并从电光调Q理论出发,分析了光路无法关断的可能原因。在此基础上,利用X射线定向仪、锥光干涉法对各晶体的轴向偏差、光学均匀性进行了表征,首次发现了LN晶体的电光不均匀性,即感应主轴偏离理论上的45°方向、通光截面各处感应双折射不一致。通过对比实验,证实了电光不均匀性是造成光路无法关断、不同开关性能差异较大的主要原因。
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| 关 键 词： | 铌酸锂晶体 电光不均匀性 电光调Q |
Study on Light Leakage Phenomenon of Lithium Niobate Electro-optic Q-switching Crystals |
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| SHANG Jifang,YANG Jinfeng,HAO Haoshan,LI Qinglian,ZHANG Ling,SUN Jun.Study on Light Leakage Phenomenon of Lithium Niobate Electro-optic Q-switching Crystals[J].Journal of Synthetic Crystals,2020,49(6):1034-1039. |
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| Authors: | SHANG Jifang YANG Jinfeng HAO Haoshan LI Qinglian ZHANG Ling SUN Jun |
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| Affiliation: | (Henan Key Laboratory of Electronic Ceramic Materials and Application, Henan University of Engineering, Zhengzhou 451191, China;School of Science, Henan University of Engineering, Zhengzhou 451191, China;TEDA Institute of Applied Physics, Nankai University, Tianjin 300457, China;School of Physics, Nankai University, Tianjin 300071, China) |
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| Abstract: | A systemic research were carried out on the problem that the lithium niobate(LN)electro-optic(EO)Q-switches have poor consistence and can not completely hold-off in pulse-off Q-switching mode.The pulse-off EO Q-switching performances of several LN Q-switches were investigated in a flash-lamp pumped Nd∶YAG laser.The possible causes for the light leakage were analyzed according to EO Q-switching theory.On these basis,the axial deviation and optical inhomogeneity were characterized by a X-ray diffraction goniometer and the conoscopic interference method.The EO inhomogeneity of LN crystals was first found,the direction of main induction axis deviated from the theoretical 45°and the induced birefringence was inconsistent throughout the clear aperture.Through contrast experiments,the EO inhomogeneity is verified to be the main reason to cause the light leakage and poor consistence. |
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| Keywords: | lithium niobate crystal electro-optic inhomogeneity electro-optic Q-switching |
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