CAJ | 학술논문

建立了空心锥状双高斯光束的模型.在空心高斯光束模型的基础上,由初始光场的光强分布,利用柱坐标下的柯林斯公式,导出了空心锥状双高斯光束经过傍轴光学系统的解析传输变换式由传输变换式计算分析了空心锥状双高斯光束在自由空问的可控传输特性,及在1,10和60 m的截面光环的光强分布.用KNbO_3双轴晶体进行实验,获得了空心锥状双高斯光束,外锥折射的锥角等于入射光会聚角.实验表明,当空心光束处于锥状发射状态时,空心光束的光环内黑斑面积随传输距离的增加而增加,实验结果与模型吻合较好.该研究为进一步设计制备基于空心锥状舣高斯光束的新型激光元件提供了理论依据和设计参量.
건립료공심추상쌍고사광속적모형.재공심고사광속모형적기출상,유초시광장적광강분포,이용주좌표하적가림사공식,도출료공심추상쌍고사광속경과방축광학계통적해석전수변환식유전수변환식계산분석료공심추상쌍고사광속재자유공문적가공전수특성,급재1,10화60 m적절면광배적광강분포.용KNbO_3쌍축정체진행실험,획득료공심추상쌍고사광속,외추절사적추각등우입사광회취각.실험표명,당공심광속처우추상발사상태시,공심광속적광배내흑반면적수전수거리적증가이증가,실험결과여모형문합교호.해연구위진일보설계제비기우공심추상의고사광속적신형격광원건제공료이론의거화설계삼량.
A new mathematical model named hollow cone double Gaussian beams is set up. Based on mathematical model of hollow double-Gaussian beams and the initial light field intensity distribution, the analytical propagation formula for hollow cone double Gaussian beams through paraxial system was derived by use of Collins formula under the cylindrical coordinates. Using the derived propagation formula, the controllable evolution properties of the intensity distribution of hollow cone double Gaussian beams in free space propagation were illustrated graphically at 1,10 and 60 m. After experenting with the biaxial crystal KNbO_3, the hollow cone double Gaussian beams was obtained and the result,that the outer conic refraction angle of was equal to the convergence angle of the beams,was found. The experiment showed that the black spot areas in hollow beams increased with the transmission distance and the mathematical mode) of hollow cone double Gaussian beams was agreed to the experiment results basically. This research is significant for design of new laser hollow beams to generate the laser device based on hollow cone double Gaussian beams.