EOSAM 2022
Open Access

Figure 6


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Revisited figure of Rashleigh’s letter [2] of 1983: the slope of the tangent (black dashed line) to the curve ∆β(k) is the group birefringence Bg, as it is defined today. Fiber C is very dispersive: at λ = 1.3 μm, i.e., k = 4.83 rad·μm−1, group birefringence Bg is 3.4 times higher than phase birefringence B!

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