CAJ | 학술논문

为了研究钾钠铌酸锶钡KNSBN晶体的全息存储特性，设计了相关实验结构，通过改变物光与参考光在KNSBN晶体中形成的体相位栅的位置，研究了体相位栅在晶体内不同位置对体全息再现像质量的影响及再现时的衍射效率．研究结果表明：当体相位栅到晶体前端的距离为2．0～3．5mm时，再现图像质量相对稳定；当距离 L＝3．0mm时衍射效率达到最大值31％，此时再现像保持时间最长，可达到262 s；图像质量最好，亮度大，稳定性好且再现像不失真．实验结果证实了KNSBN 晶体可作为一种优良的体全息存储介质，且在体全息存储中，尽可能的将物光与参考光叠加形成的体相位栅置于晶体内部时，再现时将能得到较高的衍射效率和质量较高的再现图像．
위료연구갑납니산송패KNSBN정체적전식존저특성，설계료상관실험결구，통과개변물광여삼고광재KNSBN정체중형성적체상위책적위치，연구료체상위책재정체내불동위치대체전식재현상질량적영향급재현시적연사효솔．연구결과표명：당체상위책도정체전단적거리위2．0～3．5mm시，재현도상질량상대은정；당거리 L＝3．0mm시연사효솔체도최대치31％，차시재현상보지시간최장，가체도262 s；도상질량최호，량도대，은정성호차재현상불실진．실험결과증실료KNSBN 정체가작위일충우량적체전식존저개질，차재체전식존저중，진가능적장물광여삼고광첩가형성적체상위책치우정체내부시，재현시장능득도교고적연사효솔화질량교고적재현도상．
The self‐designed experiment system was established to research the holographic storage properties of potassium sodium strontium barium niobate crystal-KNSBN .The different position of the volume grating in the crystal ,which affected the quality of reproduced image and diffraction efficiency of reproduction ,was studied by changing the position of object light and reference light in crystal KNSBN . The reproduced image quality was best and the reconstructed image kept a longest time and relatively stable ,when the distance between volume phase grating and the front of crystal was in the range of 2 .0~3 .5 mm ,especially the diffraction efficiency was 31% when the distance L= 3 .0 mm .This time produced image duration was longest ,262 seconds ,image quality was best ,luminance was biggest , stability was best and produced image did not distortion .The experimental results confirmed that the crystal KNSBN could be used as an excellent volume holographic storage media ,and it obtained high diffraction efficiency and high quality image reproduction when the position of volume phase grating , which was formed by the overlapping of the object light and reference light ,was completely in the crystal .