Table 1.

Properties of single-mode optical fiber and DAS data acquisition settings

Variable	Symbol	Value	Units	Reference
Thermo-optic coefficient	${\xi }_T$	1.20 × 10−5	1/°C	70
Strain-optic coefficient	${\xi }_{ϵ}$	–0.32	1/strain	70
Thermal expansion coefficient	$\alpha$	8.00 × 10−7	1/°C	70
Wavelength	$\lambda$	1550.12	nm	DAS acquisition settings
Index of refraction	$n$	1.468	Dimensionless	70
Gauge length	$L_G$	4.08	meters	DAS acquisition settings