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 r6th. Said secondary coating has an elastic modulus in situ of 1500 MPa or more; said outer radius r6th 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
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Authors
Dates
2018-06-04—Published
2014-04-08—Filed