A long-length remote sensor that will act as both a gas species detection, identification, and quantification system (GSD QS), and a temperature measuring system (TMS) is being developed. Particularly for use in downhole geothermal wel logging, the GSDIQS uses Raman scattering as the optical method to measure: species such as CO, and H20 vapor. Problems of fiber background have been solved through the use of holographic and dielectric filters, and the use of a laser diode source and telecommunication fiber-optics extends the sensor lengths to 10 km. The TMS usy the same graded-index, fiber-optic, and diode source, and uses the fluorescence amplitude dependence of Er:Glass with temperature (or other material) as the near-IR temperature sensing mechanism.The potential commercial application as described by the awardee: Research will result in a remote sensor to be used as an in-situ monitoring device for geothermal and oil well developers.
