Diffraction characteristics of longitudinal chirped volume grating based on transfer matrix algorithm
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摘要: 为了研究纵向啁啾体光栅的光谱衍射特性,采用传输矩阵方法进行了分析,研究了光栅的厚度、折射率调制系数和啁啾波长范围对纵向啁啾体光栅中心衍射效率的影响。结果表明,随着光栅厚度的增加,中心衍射效率随之增大;随着光栅折射率调制系数的增大,中心衍射效率也随之逐渐增加;而随着啁啾波长范围的增大,纵向啁啾体光栅的中心衍射效率则逐渐减小。此研究结果对大尺寸啁啾体光栅的设计制作有一定的参考价值。Abstract: In order to study diffraction characteristics of longitudinal chirped volume Bragg gratings, transfer matrix algorithm was used. Effects of the thickness, refractive index modulation and chirped wavelength range on the central diffraction efficiency of the longitudinal chirped volume Bragg gratings were calculated. The results show that central diffraction efficiency increases with the increase of the thickness and the refractive index modulation of the Bragg grating. However, with the increase of the chirped wavelength range, the central diffraction efficiency decreases. The research results have certain reference value for design and manufacture of large size of chirped volume Bragg gratings.
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