基于写入型光盘反射式相位光栅的衍射特性  

Diffraction Characteristics of Reflection Phase Gratings Based on Write-Once Optical Discs

作　　者：郎咸忠 吴钦 马骥[1] 唐斌[1] 苏江滨[1] 蒋美萍[1] LANG Xianzhong;WU Qin;MA Ji;TANG Bin;SU Jiangbin;JIANG Meiping(School of Mathematics and Physics,Changzhou University,Changzhou 213164,China;Teaching and Research Group of Physics,Changzhou No.1 High School,Changzhou 213003,China)

机构地区：[1]常州大学数理学院,江苏常州213164 [2]常州市第一中学物理部,江苏常州213003

出　　处：《常州大学学报（自然科学版）》2020年第5期88-92,共5页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51501018);江苏省高等学校自然科学研究面上项目(18KJB430003);常州大学信息数理学院教育教学研究课题(2017XSJY06)。

摘　　要：对基于一次性写入型光盘的反射式相位光栅的微观结构和背向衍射特性进行研究。利用简单地剥离普通光盘的方法,获得了光栅常数分别为1524,751,335 nm的自制聚碳酸酯相位光栅。分别对这3种自制光栅的背向衍射特性进行比较分析,发现CD-R和DVD-R光栅的衍射光谱在可见光区域,而BD-R相位光栅的衍射光谱在近紫外区域;CD-R相位光栅存在叠级现象,并且衍射级次越大,角分辨率越大;这3种光栅的衍射光谱的各个衍射峰与偏向角呈现近似线性关系,并且随着光栅常数的减小,同级衍射光谱角分辨率增大,最大角分辨率为0.333(°)/nm。另外,当入射光波长大于光栅常数波长时,DVD-R和BD-R相位光栅相当于亚波长光栅,仅存在0级衍射波。Reflection phase gratings based on write-once optical discs are proposed.Their morphology and backward diffraction characteristics are investigated.Home-made phase gratings with well-defined spacing about 1524,751,335 nm are readily produced by pulling off ordinary optical discs.The backward diffraction characteristics of three phase gratings are compared.The research results show that diffraction phenomena of CD-R,DVD-R and BD-R gratings are observed in visible,visible-NIR and ultraviolet regions,respectively;successive spectra overlap are observed in diffraction spectra of the CD-R grating and angular dispersion of diffraction spectra increases as the diffraction order increases;diffraction angle of the three gratings is linearly proportional to the diffraction peak,angular dispersion increases as the grating constants decreases and the maximum angular dispersion is 0.333(°)/nm.In addition,when wavelength of incident light is more than the grating period,there is only zero-order diffraction wave in diffraction spectra of the DVD-R and BD-R subwavelength gratings.

关 键 词：相位光栅 衍射 光盘 角分辨率 

分 类 号：O436.1[机械工程—光学工程]