Second order diffractive optical elements in a spatial light modulator with large phase dynamic range

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• 作者：Jorge Albero^a ; ^{j.albero@umh.es} ; Pascuala Garcí ; a-Martí ; nez^b ; José ; Luis Martí ; nez^a ; Ignacio Moreno^a
• 关键词：Spatial light modulators ; Diffraction gratings ; Diffractive lenses ; Phase shift
• 刊名：Optics and Lasers in Engineering
• 出版年：2013
• 出版时间：February, 2013
• 年：2013
• 卷：51
• 期：2
• 页码：111-115
• 全文大小：521 K

文摘

A study of the diffraction efficiency of a spatial light modulator with a large dynamic phase range is reported. We use a phase-only device that reaches 4¦Ð phase modulation depth for the wavelength of 454 nm. This allows operating phase-only diffractive optical elements in the second harmonic diffraction order, instead of in the usual first diffraction order. This type of implementation shows advantages in terms of resolution and diffraction efficiency. Experimental results are reported for blazed diffractive gratings and diffractive lenses.