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1 February 1991 Design of a GaAs Fresnel lens array for optical signal-processing devices
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Proceedings Volume 1374, Integrated Optics and Optoelectronics II; (1991) https://doi.org/10.1117/12.24959
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States
Abstract
The analysis and design of a Fresnel microlens array are developed in order to couple a large incident guided beam into a channel waveguide array for performing optical computing and signal processing operations. The device includes a planar waveguide region constituted by an AlGaAs/AlGaAs/GaAs epitaxial layer structure, with appropriate Al title and thickness, allowing the propagation of both the TE and TM polarizations of the guided beam. The channel waveguide region can be obtained by the diffusion of zinc in the planar waveguide. Each Fresnel lens of the array is assumed to be of the graded thickness type, and it can be fabricated on an additional AlGaAs layer by zinc diffusion. The designed array exhibits good theoretical properties, including very short focal length and very small focal spot size. It also makes it possible to couple only one polarization of the incident planar wave, i.e., TM polarization. A detailed simulation of the electric field distribution in the focal plane of each lens is also performed.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mario Nicola Armenise, Fabrizio Impagnatiello, and Vittorio M. N. Passaro "Design of a GaAs Fresnel lens array for optical signal-processing devices", Proc. SPIE 1374, Integrated Optics and Optoelectronics II, (1 February 1991); https://doi.org/10.1117/12.24959
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