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基于光热敏折变玻璃的透射型体布拉格光栅角度选择性研究 被引量:4

Study on Angular Selectivity of Transmitting Volume Bragg Gratings in Photo-Thermo-Refractive Glass
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摘要 采用Kogelnik耦合波理论讨论了透射型体布拉格光栅(TVBG)的角度选择特性;结合分波面双光束干涉法和两步热处理法在光热敏折变玻璃中制备了周期为1μm的TVBG,TVBG相对衍射效率可达91.1%;利用发散光束研究了TVBG的角度选择特性,验证了TVBG具有良好的角度选择特性,可以应用于角选择滤波,抑制中高频调制,提高激光的近场均匀性。 The angular selectivity of transmitting volume Bragg grating (TVBG) is analyzed based on Kogelnik's coupled-wave theory. The TVBG with a period of 1 μm is prepared in photo-thermo-refractive (PTR) glass with wave-front splitting interference method and two-step heat treatment process. The diffraction efficiency of the TVBG is up to 91.1% The angular selectivity of the TVBG is studied by use of divergent laser beams. The experimental results show that the TVBG has a good selectivity and can be used in angular filtering, which can suppress the medium and high spatial frequency modulation and improve the near-field uniformity of laser beams.
出处 《光学学报》 EI CAS CSCD 北大核心 2012年第12期43-48,共6页 Acta Optica Sinica
基金 国家自然科学基金(91023009 61108024) 国家自然科学基金委员会和中国工程物理研究院联合基金(11176021 11076021) 江苏省高校自然科学研究项目(10KJA140045 09KJB140008) 江苏省优势学科资助项目 国家863高技术惯性约束聚变资助课题
关键词 光栅 光热敏折变玻璃 衍射效率 角度选择性 近场滤波 grating photo-thermo-refractive glass diffraction efficiency angular selectivity near-field filtering
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同被引文献46

  • 1吴志伟.新型棱镜产生近似无衍射线结构光[J].光子学报,2012,41(8):956-961. 被引量:4
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