The method is becoming very popular in the oil industry as a robust method of instrumenting oil wells. Fiber can measure temperature and pressure as well as sei

The method is becoming very popular in the oil industry as a robust method of instrumenting oil wells. Fiber can measure temperature and pressure as well as seismic waves. A well can be a harsh environment to place electronic sensors and the wire to power them and receive telemetry. Electronic instrument get in the way of drilling and production. A tiny fiber has none of these problems. Ditto for transport pipelines for trauma and leaks (pressure drops). The limitation is a length of about ten miles- OK for wells, but not pipelines and underseas cables.