Tsutomu Yamate

Thermally insensitive pressure measurements up to 300 degree C using fiber bragg gratings written onto side hole single mode fiber

A thermally insensitive pressure measurement up to 300 degree C was demonstrated utilizing fiber Bragg gratings written onto a side-hole single mode fiber. The resulting temperature sensitivity is about 300 times lower than normal FBGs.

Fiber optic sensors for oil field services

The international oilfield service industry has used a large variety of sensing devices for the exploration of oil and gas in the last 70 years. These include sensors that range in the measurement of nuclear information, resistivity, acoustic, seismic, E & M fields including most recently optical sensors. The environments are very demanding in temperature, pressure, and vibration which, in general, describes the difficulty in converting current laboratory or commercial sensors for the oilfield industry. Applications where optical sensors have been successfully used and the potential future of fiber optic sensors for this industry will be reviewed.

Transversely loaded Bragg grating pressure transducer with mechanically enhancing the sensitivity

In this paper, we describe a transversely loaded Bragg grating pressure transducer with mechanically enhanced the sensitivity utilizing fiber Bragg gratings written onto a single mode fiber, and demonstrate pressure sensitivity up to 5k psi with low temperature sensitivity.