Miniature fiber-optic near-surface gap-coupled cladding waveguide Mach-Zehnder interferometric refractive index sensor inscribed by femtosecond laser

Haolei Wang,Jiangxiao Qian,Xiongxing Zhang,Junying Zhang,Xiaohui Li, Linpeng Dong,Jia Yu,Haibin Chen

Optics & Laser Technology（2023）

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摘要

•Miniature fiber-optic gap-coupled cladding waveguide Mach-Zehnder interferometer.•High refractive index sensitivity and low temperature cross-sensitivity.•Simple structure can be quickly inscribed by femtosecond laser.

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关键词

Cladding waveguide,Femtosecond laser,Fiber-optic sensor,Mach-Zehnder interferometer,Refractive index

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