Optical fiber sensors have attracted considerable attention for marine environment and
marine structural health monitoring, owing to advantages including resistance to …

Fiber–optic sensors have been widely deployed in various applications, and their use has
gradually increased since the 1980 s. Distributed fiber–optic sensors, which enable …

Distributed fiber-optic sensing technology coupled to existing subsea cables (dark fiber)
allows observation of ocean and solid earth phenomena. We used an optical fiber from the …

This book explains physical principles, unique benefits, broad categories, implementation
aspects, and performance criteria of distributed optical fiber sensors (DOFS). For each kind …

Phase-sensitive optical time-domain reflectometry (Φ-OTDR) has attracted numerous
attention due to its superior performance in detecting the weak perturbations along the fiber …

Natural hazard prediction and efficient crust exploration require dense seismic observations
both in time and space. Seismological techniques provide ground-motion data, whose …

Distributed acoustic sensing (DAS) is a new, relatively inexpensive technology that is rapidly
demonstrating its promise for recording earthquake waves and other seismic signals in a …

Distributed acoustic sensing (DAS) is an emerging technology that repurposes a fiber-optic
cable as a dense array of strain sensors. This technology repeatedly **s a fiber with laser …

We present one of the first case studies demonstrating the use of distributed acoustic
sensing deployed on regional unlit fiber-optic telecommunication infrastructure (dark fiber) …

Our understanding of subsurface processes suffers from a profound observation bias:
seismometers are sparse and clustered on continents. A new seismic recording approach …