Raman-enhanced transmission fiber
    23.
    发明授权

    公开(公告)号:US10175420B2

    公开(公告)日:2019-01-08

    申请号:US15355790

    申请日:2016-11-18

    Abstract: According to some embodiments an optical fiber comprising: (I) a silica based core having: an inner core region with maximum refractive index delta of the core, Δ0 in % measured relative to pure SiO2≤0.1%, and an outer core region with a minimum refractive index delta Δ1, where Δ1 Aeff, λ=1475, and (Aeffλ=1525−Aeff, λ=1475)/Aeffλ=1525≥0.07; and (II) an annular cladding surrounding the core, the cladding including: (i) a low index ring surrounding the core and having a minimum refractive index delta ΔRMIN, where ΔR,MIN≥Δ1; and (ii) an outer cladding with a refractive index delta ΔOuter-Clad relative to pure silica, such that ΔOuter-Clad>ΔR,MIN.

    Optical fiber with macrobend loss mitigating layer

    公开(公告)号:US09874686B2

    公开(公告)日:2018-01-23

    申请号:US15166772

    申请日:2016-05-27

    Abstract: An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta Δ1MAX; and LP01 effective area >100 μm2 at 1550 nm; (ii) an inner cladding surrounding the core and having a minimum relative refractive index delta Δ2MIN and ΔcoreMAX>Δ2MIN; (iii) an outer cladding surrounding the inner cladding and comprising a first outer cladding portion with a maximum refractive index Δ3A such that Δ3A>Δ2MIN; and another outer cladding portion surrounding the first outer cladding portion with a maximum refractive index delta Δ3B wherein with a maximum refractive index delta Δ3B wherein Δ3B>Δ3A, said another portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ΔC wherein ΔC>Δ3B.

    OPTICAL FIBER SPAN WITH LOW DIFFERENTIAL MODE DELAY

    公开(公告)号:US20170219769A1

    公开(公告)日:2017-08-03

    申请号:US15416073

    申请日:2017-01-26

    CPC classification number: G02B6/0288 G02B6/02009 G02B6/02042 G02B6/0365

    Abstract: A fiber span comprising: a first optical fiber and a second optical fiber coupled to the first optical fiber, both fibers comprising the an inner core region with maximum refractive index delta, Δ0≦0.1% and an outer radius R1>4.5 μm, an outer core region with an outer radius R2 and a minimum refractive index delta Δ1 and alpha value α≧5, wherein Δ1 ΔR,MIN; the first fiber introducing differential mode delay DMD1 for wavelengths between 1525 and 1570 nm such that |DMD1|≦100 ps/km, and a first differential mode delay slope DMDS1; the second fiber introducing differential mode delay DMD2 for wavelengths between 1525 and 1570 nm such that |DMD2|≦100 ps/km, and a second differential mode delay slope DMDS2 that has an opposite sign from the first dispersion slope DMDS1; wherein total differential mode delay provided by the first fiber in conjunction with the second fiber is DMDtot=DMD1+DMD2, and −1.0 ps/km

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