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Fabricating lifted Haar transform image compression optical chip based on femtosecond laser
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作者 TAO Qing WEI Liangpeng +3 位作者 KUANG Wenxiang YIN Yegang CHENG Jian LIU Dun 《Optoelectronics Letters》 EI 2023年第9期519-525,共7页
In this paper,a lifted Haar transform(LHT)image compression optical chip has been researched to achieve rapid image compression.The chip comprises 32 same image compression optical circuits,and each circuit contains a... In this paper,a lifted Haar transform(LHT)image compression optical chip has been researched to achieve rapid image compression.The chip comprises 32 same image compression optical circuits,and each circuit contains a 2×2 multimode interference(MMI)coupler and aπ/2 delay line phase shifter as the key components.The chip uses highly borosilicate glass as the substrate,Su8 negative photoresist as the core layer,and air as the cladding layer.Its horizontal and longitudinal dimensions are 8011μm×10000μm.Simulation results present that the designed optical circuit has a coupling ratio(CR)of 0:100 and an insertion loss(IL)of 0.001548 d B.Then the chip is fabricated by femtosecond laser and testing results illustrate that the chip has a CR of 6:94 and an IL of 0.518 d B.So,the prepared chip possesses good image compression performance. 展开更多
关键词 Fabricating lifted Haar transform image compression optical chip based on femtosecond laser IMAGE
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