Abstract: The invention discloses a preparation method and device of active microcrystalline fiber, place the prefabricated rod in the drawing furnace for wire drawing, the drawn fiber is induced by magnetic field in uncoated state and combined with laser treatment technology, the laser beam is focused on the fiber and recrystallized after laser treatment to obtain active microcrystalline fiber. Appropriate laser processing power directly affects the silicate glass fiber in the crystal structure, type, degree of crystallinity, grain size, content, and how much residual phase of glass. Induced by external magnetic field, the thermodynamics and dynamics of crystallization process are changed, make the crystal size distribution is better and uniform, reduce the phenomenon of condensation and makes the grain size is smaller.

Abstract: The invention discloses a preparation method and device of active microcrystalline fiber, place the prefabricated rod in the drawing furnace for wire drawing, the drawn fiber is induced by magnetic field in uncoated state and combined with laser treatment technology, the laser beam is focused on the fiber and recrystallized after laser treatment to obtain active microcrystalline fiber. Appropriate laser processing power directly affects the silicate glass fiber in the crystal structure, type, degree of crystallinity, grain size, content, and how much residual phase of glass. Induced by external magnetic field, the thermodynamics and dynamics of crystallization process are changed, make the crystal size distribution is better and uniform, reduce the phenomenon of condensation and makes the grain size is smaller.

Abstract: Provided are an optical coupling device and an optical coupling unit including the optical coupling device. The optical coupling device includes a right-angle reflecting prism (23) and a mobile optical fibre connector (21). A reflecting surface of the right-angle reflecting prism (23) is provided with a curve reflecting surface (24), the curve reflecting surface being used for gathering and reflecting rays propagated by an optical fibre. The mobile optical fibre connector (21) is fixed to the right-angle reflecting prism (23), to make the rays propagated by the optical fibre being incident on the curve reflecting surface (24) of the right-angle reflecting prism (23).