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Proceedings Paper

Broadband polarization-independent reflective 1×2 beam splitters under normal incidence based on encapsulated metal-dielectric gratings
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Paper Abstract

An encapsulated metal-dielectric grating is proposed for realization of reflective broadband polarization-independent 1×2 beam splitter under normal incidence. One can quickly choose a grating structure to realize ultrabroad working waveband by using unified designing method for low-dispersion materials based on the diffraction efficiency map versus the normalized period and depth. Moreover, the center wavelength can be flexibly changed. As an example, a reflective ultrabroadband polarization-independent 1×2 beam splitters operating at wavelength of 1550 nm is designed under normal incidence. The simulation results indicated that a bandwidth of 144 nm could be achieved for the total efficiency over 92%. This kind of broadband polarization-independent 1×2 beam splitters could be found in a variety of applications, such as ultrashort pulse splitting, coherent beam combination, complex vector beam shaping, and also high precision displacement measurement.

Paper Details

Date Published: 18 November 2019
PDF: 6 pages
Proc. SPIE 11188, Holography, Diffractive Optics, and Applications IX, 111880U (18 November 2019); doi: 10.1117/12.2537284
Show Author Affiliations
Zhengkun Yin, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Changhe Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Junjie Yu, Shanghai Institute of Optics and Fine Mechanics (China)
Yunkai Lu, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 11188:
Holography, Diffractive Optics, and Applications IX
Yunlong Sheng; Changhe Zhou; Liangcai Cao, Editor(s)

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