ANTI-RESONANT HOLLOW CORE OPTICAL FIBER HAVING MULTIPLE RESONANT LAYERS

An anti-resonant hollow core optical fiber having multiple resonant layers. The optical fiber comprises a low refractive index core region (1) and a high refractive index cladding region. The high refractive index cladding region comprises an inner cladding region (4) and an outer cladding region (5). The outer cladding region (5) clads the inner cladding region (4) and the core region (1). The inner cladding region (4) comprises a first anti-resonant layer (2) and a second anti-resonant layer (3), and the first anti-resonant layer (2) and the second anti-resonant layer (3) surround the core region (1); and the first anti-resonant layer (2) comprises several layers of micro-capillary tubes and the second anti-resonant layer (3) supports the first anti-resonant layer (2). The optical fiber adopts a double-clad structure and uses two or more anti-resonant layers such that theoretically simulated loss is reduced to 0.1 dB/km, and has the features of ultra-low transmission loss, wide spectral ...