학술논문
Design and fabrication of a diffractive phase element for wavelength demultiplexing and spatial focusing simultaneously
Document Type
Academic Journal
Author
Source
Applied Optics. Dec 10, 1996, Vol. 35 Issue 35, p6859, 6 p.
Subject
Language
ISSN
1559-128X
Abstract
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.