Inventors:
Emil F. Homuth - Los Alamos NM
Assignee:
The United States of America as represented by the United States
Department of Energy - Washington DC
International Classification:
H01J 516
Abstract:
A fiber optic geophysical sensor in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects.