A space magnetic field sensor based on micro-nano optical fiber and its manufacturing method
A micro-nano optical fiber, space magnetic field technology, applied in the size/direction of the magnetic field, the use of magneto-optical equipment for magnetic field measurement, the direction of the instrument, etc. Small size, compact structure, wide frequency response effect
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[0020] Such as figure 1 As shown, a spatial magnetic field sensor based on a micro-nano optical fiber at least includes: a micro-nano optical fiber 1 and a magneto-optic glass sheet 2, and the micro-nano optical fiber 1 is made of a single-mode optical fiber through a fusion tapered process with different diameters at both ends. Change, the middle is a micro-nano-scale waist region structure, and the waist region with the micro-nano optical fiber 1 in the middle and the magneto-optical glass sheet 2 are pasted by optical glue 3 to form a waveguide coupling structure. The fusion tapering process belongs to the existing mature technology, so it will not be described too much here.
[0021] When the diameter scale of the fiber reaches the micro-nano level and the micro-nano fiber 1 is formed, the mode field distribution of the fiber will change significantly, and a strong evanescent field energy will be formed around it. Due to the effect of the evanescent field, when the micro-...
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