MEMS-based tunable Fabry Perot filter in near-infrared band with improved cantilever beams
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Abstract:
Fabry-Perot (F-P) tunable filter based on Micro-Electro-Mechanical System (MEMS) was widely used in optical com-munication, laser, and optical imaging. At present, there is little research on F-P filters in the near-infrared band from 1260nm to 1620nm. Therefore, this letter designs a novel F-P filter based on MEMS. Three improved cantilevers beam circular bridge deck structures, including circular holes, V-shaped grooves, and square grooves, were analyzed through finite element simulation. Obtain voltage-displacement, von Mises stress, and mirror flatness to select the optimal bridge deck structure. The results show that when different bridge decks reach the same displacement, the voltage required by the square grooves cantilever beam bridge deck is the smallest, and the von Mises stress and mirror flatness of the square grooves bridge deck structure can also meet the design requirements of the filter. Finally, the filtering performance of the optimized square grooves bridge deck structure filter is analyzed.
Keywords:
Project Supported:
The National Natural Science Foundation of China (General Program; Nos. 62205040; 51874064), The Chongqing University of Technology graduate innovation project (No. gzlcx20243295).
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