A highly sensitive sensor of methane and hydrogen in tellurite photonic crystal fiber based on four-wave mixing
نویسندگان
چکیده
A tellurite photonic crystal fiber (PCF) sensor structure is proposed for simultaneous measurements of methane and hydrogen. The a simple hexagonal three-cladding structure, six air holes in the inner cladding are coated with sensitive film hydrogen respectively. Based on degenerate four-wave mixing (DFWM) theory, direct relationship between wavelength shifts Stokes spectrum or anti-Stokes variations gas concentration can be established to realize accurate detection concentration. influences pump gas-sensitive thickness sensitivity investigated, maximum sensitivities after parameter optimization − 2.052 nm/% 0.236 nm/%, linearity fitting reach up 99.95%, low limit 450 ppm 2500 ppm. sensing method based non-silica also extended other detections mixtures mid-infrared field.
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ژورنال
عنوان ژورنال: Optical and Quantum Electronics
سال: 2022
ISSN: ['1572-817X', '0306-8919']
DOI: https://doi.org/10.1007/s11082-022-03587-x