ANTI-BENDING MUTI-MODE OPTICAL FIBER

摘要

An anti-bending multi-mode optical fiber for an access network and a miniaturized optical device comprises an optical fiber and a coating layer covering the optical fiber. The optical fiber is composed of a quartz glass core layer with a parabola-shape index or a step-index profile structure and a quartz glass cladding layer surrounding the core layer. The core layer is made of quartz glass material doped with germanium and fluorine. The cladding layer is covered with two cured polymer coating layers, wherein the inner coating layer is low-refraction index flexible polymer coating layer, and the outer coating layer is high Young's modulus polymer coating layer. The inner coating layer of the multi-mode optical fiber with low-refraction index avoids the internal stress in the optical fiber, so as to improve the mechanical performance of the optical fiber and guarantee better usage performance and longer service life of the optical fiber working in a small-radius bending state.