We introduced a innovative approach to fabricating a 1×2 power splitter under the silicon-on-insulator (SOI) platform, which can be scaled to a 1×N system device. The current design strategy is based on the well-known simplified coherent coupling, which allows for the construction of sharp bends. To split the incoming light, a small multimode interferometer (MMI) is added at the entrance of the splitter. Analysis and discussion regarding the sensitivity of the design parameters will be expanded throughout the paper. In addition, the proposed splitter architecture was fabricated and evaluated in 1×2 and 1×4 versions, and these devices were compared with splitters based on standard MMI also performed on the same SOI photonic chip. The splitter scheme demonstrates similar performance to standard MMI; however, a slight spectral flat response was observed in the new devices ensuring reliable operation across various wavelengths. This presented approach enables the design of highly compact devices, potentially opening different avenues to improve and enhance the performance of integrated devices developed under the SOI scheme.
In this work we introduce a new approach to fabricate under SiN platform a small foot print power splitter. The proposed strategy of design is based on the well-known simplified coherent coupling. The sensibility of design parameters are also analyzed and discussed in this paper. By this approach very compact device can be designed and it opens a new avenue to improve and enhance the performance of integrated devices developed under silicon nitride scheme.
In this paper, we propose a new sensing topology based on a differential power analysis, using an array of photonic sensors. The system structure is composed of a 1x4 balanced power divider, three Bragg gratings, and a reference branch. In particular, we present an analysis of the individual sensing parameters of the Bragg gratings, as well as the procedure to be followed in order to optimise the design parameters of the sensing system. The designs were verified with simulations by different numerical methods. Finally, a substantial reduction of the detection limit is demonstrated by easy-to-implement signal post-processing.
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