本文研究了体全息光学元件的布拉格(Bragg)偏移及补偿特性,得出了在某些调制度下,在偏移布拉格条件下仍可以得到较高的衍射效率的结论.文中也讨论了体全息光学元件布拉格偏移的容忍性并分别讨论了体全息元件布拉格偏移所允许的角度偏移和再现波波长偏移的性质,得出了在大调制度下体全息光学元件的布拉格偏移容忍性大的结论.同时指出实现体全息光学元件高衍射效率的变波长再现的途径,并给出相应的实验结果.

The Bragg deviations proterties of volume holographic optical elements (HOEs) and compensation are Studied. And the allowable deviations of wavelength and angle from Bragg condition are discussed. Finally, tho authors como to a conclusion that at some modulations the higher diffraction efficiencies of VHOES can still be obtained off Bragg condition and the value of allowable Bragg deviation is larger in higher modulation. The experimental resulta are given in this paper.