20 February 2015 Achromatic phase elements based on a combination of surface and volume diffractive gratings
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Abstract
Phase masks are important optical elements that have been utilized for several decades in a large variety of applications. Recently, we demonstrated a new type of phase masks fabricated by encoding phase profiles into volume Bragg gratings, allowing these holographic elements to be used as phase masks at any wavelength capable of satisfying the Bragg condition of the hologram. Here, we present a new method of true achromatization of this type of phase masks that removes the need for angle tuning and is implemented by combining this holographic phase masks approach with a pair of surface diffraction gratings.
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Ivan Divliansky, Evan Hale, Marc SeGall, Daniel Ott, Boris Y. Zeldovich, Bahaa E. A. Saleh, Leonid B. Glebov, "Achromatic phase elements based on a combination of surface and volume diffractive gratings", Proc. SPIE 9346, Components and Packaging for Laser Systems, 93460Q (20 February 2015); doi: 10.1117/12.2081006; https://doi.org/10.1117/12.2081006
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