The temperature dependence of the bend- and twist-induced birefringence in LB600 low-birefringence fiber has been measured at λ = 0.633 μm. The relative temperature dependence B = (1/β)dβ/dT of the bend-induced birefringence β was found to be (5.7 ± 0.2) × 10−4 K−1 over a temperature range from −5 to 70°C. The relative temperature dependence A = (1/g)dg/dT of the twist-induced birefringence g was found to be (4.95 ± 0.25) × 10−4 K−1 (between 22 and 150°C). The measured values of A and B are in accordance with a relative temperature dependence (1/C)dC/dT of the stress-optic coefficient C equal to (4.2 ± 0.2) × 10−4 K−1.
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