Session 1 | Fiber Optic Sensing – Principles, Techniques and Solutions

Session 1

Fiber Optic Sensing – Principles, Techniques and Solutions
Convener: Felix Bernauer | Co-coveners: Ali Masoudi, Paul-Eric Pottie

From single-point sensors such as optical fiber gyroscopes that are used in rotational seismology and sensor arrays such as fiber Bragg grating (FBG) arrays that are used for high-resolution seismic prospecting to integrated noise measurement over fiber deployed in-field, optical fiber sensors have certainly helped geophysicists and seismologists over the past two decades.

Fiber optic sensing technologies open new ways for observations of the full motion within the seismic wavefield with unprecedented precision. These include point observations of three translation vectors, three rotation axes and six components of strain as well as a single-axis strain distribution using distributed optical fiber sensors. Distributed Acoustic Sensors, for instance, allow for an extremely dense spatial sampling of the seismic wavefield with a relatively small logistical effort while Distributed Temperature Sensors enable continuous monitoring of subsurface geophysical features such as groundwater flow dynamics, permafrost conditions, and geothermal reservoirs' thermal behavior, offering valuable insights into environmental processes and geotechnical studies.

This session will cover technical aspects of fiber optic sensors and ranges from working principles and instrumentation designs to performance characteristics and deployment strategies to testing and calibration techniques for any kind of fiber optic sensing technology which is useful for the observation of geophysical parameters.

We welcome contributions to novel fiber optic measurement techniques that advance any observation of geophysical parameters. These include distributed sensing technologies for ground motion and temperature, integrated strain measurements using polarization analysis or ultra-stable lasers on telecommunication fibers, sensing array technologies used for recording seismic wave patterns, as well as technologies for point measurements of ground strain, rotation and displacement.

Invited speaker: Cecilia Clivati (INRIM, Italy)

From single-point sensors such as optical fiber gyroscopes that are used in rotational seismology and sensor arrays such as fiber Bragg grating (FBG) arrays that are used for high-resolution seismic prospecting to integrated noise measurement over fiber deployed in-field, optical fiber sensors have certainly helped geophysicists and seismologists over the past two decades.

Fiber optic sensing technologies open new ways for observations of the full motion within the seismic wavefield with unprecedented precision. These include point observations of three translation vectors, three rotation axes and six components of strain as well as a single-axis strain distribution using distributed optical fiber sensors. Distributed Acoustic Sensors, for instance, allow for an extremely dense spatial sampling of the seismic wavefield with a relatively small logistical effort while Distributed Temperature Sensors enable continuous monitoring of subsurface geophysical features such as groundwater flow dynamics, permafrost conditions, and geothermal reservoirs' thermal behavior, offering valuable insights into environmental processes and geotechnical studies.

This session will cover technical aspects of fiber optic sensors and ranges from working principles and instrumentation designs to performance characteristics and deployment strategies to testing and calibration techniques for any kind of fiber optic sensing technology which is useful for the observation of geophysical parameters.

We welcome contributions to novel fiber optic measurement techniques that advance any observation of geophysical parameters. These include distributed sensing technologies for ground motion and temperature, integrated strain measurements using polarization analysis or ultra-stable lasers on telecommunication fibers, sensing array technologies used for recording seismic wave patterns, as well as technologies for point measurements of ground strain, rotation and displacement.

Invited speaker: Cecilia Clivati (INRIM, Italy)