Dong B Z, Zhang G Q, Yang G Z, Gu B Y, Zheng S H, Li D H, Chen Y S, Cui X M, Chen M L, Liu H D
Appl Opt. 1996 Dec 10;35(35):6859-64. doi: 10.1364/AO.35.006859.
The design of a diffractive phase element (DPE) that simultaneously implements wavelength demultiplexing and focusing is carried out on the basis of the general theory of amplitude-phase retrieval. The designed DPE is fabricated with optical contact lithography. Three masks are needed to produce the surface-relief structure of the DPE with eight quantized levels in depths. Experiments demonstrate that the designed DPE can successfully implement both the functions of demultiplexing three different-wavelength beams and focusing each component at a predesignated position simultaneously. Experimental measurements are in good agreement with the results of numerical simulations.
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