Improved vertical optical fiber borehole strainmeter design for measuring Earth strain.


Fiber-based interferometers provide the means to sense very small displacements over long baselines, and have the advantage of being nearly completely passive in their operation, making them particularly well suited for geophysical applications. A new 250 m, interferometric vertical borehole strainmeter has been developed based completely on passive optical… (More)
DOI: 10.1063/1.4935923


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