17 January 2011 Self-organization of optical Z-connections in three-dimensional optical circuits simulated by the finite difference time domain method
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Abstract
To reduce efforts for optical assembly with micron/submicron accuracy, we developed the reflective self-organized lightwave network (R-SOLNET). In R-SOLNET, optical devices with wavelength filters on their core facets are placed in a photo-polymer. Write beams from some of the devices and reflected write beams from the wavelength filters of the other devices overlap. In the overlap regions, the refractive index of the photo-polymer increases, pulling the write beams to the wavelength filter locations (the "pulling water" effect). By self-focusing, self-aligned optical waveguides are formed between the optical devices. In the present work, we simulated self-organization of optical Z-connections utilizing R-SOLNET in three-dimensional optical circuits by the finite difference time domain method. A 2-μm-thick core with a 45° mirror is on a 0.5-μm-thick under clad layer to form an optical waveguide film. Two optical waveguide films are stacked with a 10-μm gap filled with a photo-polymer, whose refractive index varies from 1.5 to 1.7 with write beam exposure. From the simulation, it is found that the "pulling water" effect is induced even when ~1-μm displacement exists between the two optical waveguide films and the coupling efficiency increases from 30% to 60%.
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Tetsuzo Yoshimura, Tetsuzo Yoshimura, Kazuyuki Wakabayashi, Kazuyuki Wakabayashi, } "Self-organization of optical Z-connections in three-dimensional optical circuits simulated by the finite difference time domain method", Proc. SPIE 7944, Optoelectronic Interconnects and Component Integration XI, 79440R (17 January 2011); doi: 10.1117/12.871439; https://doi.org/10.1117/12.871439
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