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    Bending Insensitive Single-mode Fibre (BI-SMF)

    YOFC bending insensitive single-mode fibre are particularly developed for applications with very small bending radius. The fibre has excellent bending resistance by the special design of waveguide structure, and the minimum bending radius can reach 5mm. By strictly controlling of preform raw materials and drawing process, the fibre has excellent mechanical properties and can meet high proof test level and long spool length requirements. In this fibre series, BI1011-A is suitable for optical fibre guidance, and BI1015-A and BI1015-B are suitable for fibre hydrophone. BI1015-B is a small-diameter fibre with a cladding diameter of 80μm, serving the application of compact components.
    Applications
    • Small-sized optical component
    • Optical-fibre guidance
    • Hydrophone
    Characteristics
    • Low macro-bending loss including L-band
    • Low micro-bending induced loss
    • Superior geometry
    • Excellent mechanical properties, proof test level can reach 200 kpsi
    • The cladding diameter is 80 μm, realizing the miniaturization of optical fibre

    Specifications

    Fibre Type

    BI 6/125-18/250*①

    		 BI 6/100-18/200 BI 7/125-18/250 BI 7/80-18/170*② BI 7/80-19/170 BI 8/125-14/250
    Part No.

    BI1011-A

    BI1011-C

    BI1015-A

    BI1015-B

    BI1015-F

    BI1016-A
    Optical Properties
    Fibre Cutoff Wavelength (nm)

    ≤1260

    ≤1260

    1350 - 1500

    1350 - 1500

    1350 - 1500

    ≤1260
    Zero Dispersion Wavelength (nm)

    ≤1420

    ≤1420

    -

    -

    -

    1300~1324
    Mode-field Diameter@1310nm (μm)

    6.5±0.4

    6.5±0.4

    -

    -

    -

    8.6±0.4
    Mode-field Diameter@1550nm (μm)

    7.4±0.5

    7.4±0.5

    7.5±0.4

    7.0±0.4

    6.6±0.4

    9.6±0.5
    Attenuation@1310 (dB/km)

    ≤0.39

    ≤0.42

    -

    -

    -

    ≤0.35
    Attenuation@1383 (dB/km)

    -

    -

    -

    -

    -

    ≤0.35
    Attenuation@1490 (dB/km)

    ≤0.26

    ≤0.32

    -

    -

    -

    -
    Attenuation@1550 (dB/km)

    ≤0.24

    ≤0.30

    ≤0.26

    ≤0.28

    ≤0.28

    ≤0.21
    Attenuation@1625 (dB/km)

    ≤0.25

    ≤0.31

    ≤0.27

    ≤0.29

    ≤0.29

    ≤0.23
    Geometrical Properties

    Cladding Diameter（μm）*③

    124.7±0.5

    100.0±1.0

    124.7±0.5

    80.0±1.0

    80.0±1.0

    124.4±0.4
    Coating Diameter（μm）

    240.0±5.0

    198.0±5.0

    240.0±5.0

    170.0±5.0

    170.0±5.0

    240.0±5.0
    Cladding Non-circularity (%)

    ≤1.0

    ≤1.0

    ≤0.7

    ≤0.7

    ≤0.7

    ≤0.7
    Core/Cladding Concentricity (μm)

    ≤0.6

    ≤0.6

    ≤0.6

    ≤0.6

    ≤0.6

    ≤0.6
    Macro-bending Induced Loss
    φ10mm-
    1turn(dB）

    1550 nm

    -

    ≤0.05

    -

    -

    -

    ≤0.15
    1625nm

    -

    ≤0.15

    -

    -

    -

    ≤0.45
    φ15mm-
    1turn(dB）    		 1550 nm

    ≤0.05

    -

    -

    -

    -

    ≤0.05
    1625nm

    ≤0.10

    -

    -

    -

    -

    ≤0.25
    φ20mm-
    1turn(dB）    		 1550 nm

    ≤0.02

    -

    -

    -

    -

    ≤0.03
    1625nm

    ≤0.05

    -

    -

    -

    -

    ≤0.10
    φ10mm-25turns(dB) 1550nm

    -

    -

    ≤0.02

    ≤0.02

    ≤0.02

    -
    φ30mm-10turns(dB) 1550 nm

    ≤0.01

    -

    -

    -

    -

    -
    1625nm

    ≤0.02

    -

    -

    -

    -

    -
    Mechanical Properties
    Proof Test Level (kpsi)

    150

    150

    150

    200

    200

    100
    Environmental Properties  1310 nm，1550 nm and 1625 nm
    Operating Temperature (℃)

    -60 to +85

    -60 to +85

    -60 to +85

    -60 to +85

    -60 to +85

    -60 to +85
    • *①200μm outer diameter fibre is available
    • *②135μm outer diameter fibre is available
    • *③Reducing-cladding diameter fibre such as 60μm, 100μm, and other non-standard size fibre are available

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