LOW DIAMETER OPTICAL FIBER Russian patent published in 2018 - IPC G02B6/02 

FIELD: instrument engineering.

SUBSTANCE: invention relates to optical fibers. Optical fiber comprises a core, said core having an outer radius r₁, shell surrounding said core, said shell having an outer radius r₄; primary coating surrounding said shell, said primary coating having an outer radius r₅, said primary coating has an elastic modulus in situ of not higher than 0.50 MPa; and a secondary coating, surrounding said primary coating, said secondary coating having an outer radius r_6th. Said secondary coating has an elastic modulus in situ of 1500 MPa or more; said outer radius r_6th is 110 μm or less, mode field diameter of 9 μιη or greater at 1310 nm and exhibits a bend loss at a wavelength of 1550 nm, when turned about a mandrel having a diameter of 15 mm, of less than 0.5 dB/turn.

EFFECT: technical result is a reduction in the radius and diameter of the mode field, which is compatible with the diameter of the mode field of standard single-mode fibers.

25 cl, 6 dwg, 4 tbl