MULTI-CORE FIBRE-OPTIC GUIDE (VERSIONS) Russian patent published in 2013 - IPC G02B6/36 

FIELD: physics.

SUBSTANCE: provided is a multi-core fibre-optic guide, having at least two light-guiding cores, a barrier region, inner reflecting claddings and an outer protective coating. The cores are made from doped quartz glass with refraction indices n_c1, n_c2…n_ck. Each light-guiding core is surrounded by a corresponding inner reflecting cladding. The cladding has an arbitrary shape and is made from quartz glass or doped quartz glass with refraction indices that are less than those of the corresponding light-guiding core. The barrier region made from quartz glass is formed in the space between the inner reflecting claddings and the outer cladding. The refraction index of the barrier region is less than that of each inner reflecting cladding. The barrier region can be continuous or intermittent and can have an arbitrary shape in the cross-section; it can also be in form of through-holes in quartz or doped glass.

EFFECT: reduced mode interaction, reduced optical crosstalk, smaller distance between cores, increase in the number of cores in a multi-core light-guide with the same outer diameter of the light-guide and bending optical losses in each core of the light-guide.

63 cl, 4 dwg