Surface plasmon sensing of gas phase contaminants using optical fiber.

Thornberg, Steven Michael ; White, Michael I. ; Rumpf, Arthur Norman ; Pfeifer, Kent Bryant

Sandia National Laboratories

关键词: Partial Pressure;    Dimensions;    Monitoring;    Fibers;    Plasmons;   

DOI  :  10.2172/973354
RP-ID  :  SAND2009-6096
RP-ID  :  AC04-94AL85000
RP-ID  :  973354

美国|英语

来源: UNT Digital Library

【 摘 要 】

Fiber-optic gas phase surface plasmon resonance (SPR) detection of several contaminant gases of interest to state-of-health monitoring in high-consequence sealed systems has been demonstrated. These contaminant gases include H{sub 2}, H{sub 2}S, and moisture using a single-ended optical fiber mode. Data demonstrate that results can be obtained and sensitivity is adequate in a dosimetric mode that allows periodic monitoring of system atmospheres. Modeling studies were performed to direct the design of the sensor probe for optimized dimensions and to allow simultaneous monitoring of several constituents with a single sensor fiber. Testing of the system demonstrates the ability to detect 70mTorr partial pressures of H{sub 2} using this technique and <280 {micro}Torr partial pressures of H{sub 2}S. In addition, a multiple sensor fiber has been demonstrated that allows a single fiber to measure H{sub 2}, H{sub 2}S, and H{sub 2}O without changing the fiber or the analytical system.