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High sensitivity temperature sensor based on liquid filled hole-assisted dual-core fiber
摘要： A high sensitivity temperature sensor is numerically and experimentally investigated in liquid filled eccentric hole-assisted dual-core fiber (EHADCF). The sensor is constructed by cascading two single mode fibers (SMFs) with an intermediate liquid filled EHADCF segment. The light couples periodically between the center and suspended cores due to small core distance. Refractive index (RI) matching liquid with high thermo-optic coefficient is filled into the air-hole of the EHADCF as the cladding of the suspended core. The dispersion curves of the center and suspended cores of the EHADCF change with the temperature, leading to the shift of the resonance peak. The measured temperature sensitivity of the sensor is -562.4 pm/°C. In addition, the stability of the sensor is also measured. Due to high sensitivity, good stability, compact size and large temperature range, the proposed sensor shows promising potentials for temperature sensing in environment monitoring.
关键词： hole-assisted fiber,temperature sensor,dual-core fiber,optical fiber sensor,coupler
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE Avionics and Vehicle Fiber-Optics and Photonics Conference (AVFOP) - Arlington, VA, USA (2019.11.5-2019.11.6)] 2019 IEEE Avionics and Vehicle Fiber-Optics and Photonics Conference (AVFOP) - Measurements and Discussion of a Balanced Photonic Link Utilizing Dual-Core Optical Fiber
摘要： The use of dual-core optical fibers in balanced photonic links is explored. The gain and noise performance improvements are demonstrated. The optical crosstalk is measured as a function of frequency, and the balanced phase tolerance as a function of temperature is discussed.
关键词： photonic links,balanced detection,dual-core fiber
更新于2025-09-11 14:15:04
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Thermal Effects on Modal Properties of Dual-Core Yb-Doped Fibers
摘要： The impact of thermo-optic refractive-index changes arising from the core heat load in a dual-core fiber amplifier is studied through finite-element based numerical simulations. Trends in coupling lengths, effective area, core overlaps of fundamental and higher-order supermodes, effects of asymmetric heat loads, and thermo-optic mode coupling parameters are quantified. It is concluded that the coupling between cores is only moderately altered by the overall heat load, but can be strongly sensitive to asymmetric loads. The influence of the core coupling strength is demonstrated to be very important on the supermode effective area, besides the shrinking due to thermal effects. While the thermo-optic index perturbations can lead to guidance of higher-order supermodes, it seems realistic to maintain single-mode operation through gain suppression of the higher-order modes. On the other hand, thermo-optic couplings between fundamental supermodes are found to be quite strong.
关键词： dual-core fiber,fiber amplifier,supermodes,thermo-optic,thermal effects
更新于2025-09-04 15:30:14