L1

L2

εF

Estimated εF

Deviation in εF

Fiber 1

136.7

142.6

4.3%

6.2%

−1.9%

Fiber 2

241.0

253.7

5.3%

6.2%

−0.9%

Fiber 3

80.7

84.3

4.6%

5.3%

−0.7%