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Background Gastrointestinal microbiota, particularly gut microbiota, is associated with human health. The biodiversity of gut microbiota is affected by ethnicities and environmental factors such as dietary habits or medicine intake, and three enterotypes of the human gut microbiome were announced in 2011. These enterotypes are not significantly correlated with gender, age, or body weight but are influenced...
The paper presents an over-current protection circuit designed for high voltage power switches. The proposed protection mechanism employs a current limiter to monitor the current flowing through the power switch. The current limiter protects the power switch from potential damage by automatically switching off the device once the current exceeds the preset rating value. Simulated results exhibit that...
We demonstrate integrated micro Michelson interferometer with a sphered-end hollow-core fiber as sensing head. This simple device with cost-effective low-coherent lightsources can be used to determine the real-time moving direction based on core-cladding mode interferences.
We demonstrate asymmetric Michelson fiber interferometer with a spatial mode beating arm where its output end has a sphered-end hollow-core fiber as a sensing head. The multiple foci can offer the advantage for direction determination.
We demonstrate a high-sensitivity broadband micro-Michelson fiber interferometer using a singlemode fiber end-spliced with a short (43.9μm) hollow-core end-collapsed lensed fiber. The extinction ratio can be above 25 dB over the 1250-1650 nm wavelength range.
We demonstrate broadband micro interferometric sensor based on multi-beam interference using a singlemode fiber end-spliced with an end-sphered hollow-core fiber lens. The length of sensor head is less than 240μm and displacement resolution is 0.8nm.
A differential gain-dependent phase shift between the core- and cladding-mode can be efficiently and all-optically tuned by a cw 975nm pump light for Mach-Zehnder interferometers using successive abrupt fiber tapers on a 1.2-cm-long Er/Yb-codoped fiber.
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