L₁

L₂

ε_F

Estimated ε_F

Deviation in ε_F

Fiber 1

34.2

36.2

5.6%

8.4%

−2.7%

Fiber 2

57.1

59.2

3.7%

8.8%

−5.1%

Fiber 3

18.7

20.3

8.7%

9.8%

−1.1%

Fiber 4

83.5

89.4

7.2%

10.3%

−3.1%