Fiber optic chemical microsensors employing optically active silica microspheres

Edward J. A. Pope

doi:10.1117/12.208484

8 May 1995 Fiber optic chemical microsensors employing optically active silica microspheres

Edward J. A. Pope

Proceedings Volume 2388, Advances in Fluorescence Sensing Technology II; (1995) https://doi.org/10.1117/12.208484
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

Dye-doped porous silica microspheres can be prepared from liquid solution at temperatures near ambient. Microsphere diameter can be controlled between approximately 5.0 microns to in excess of a millimeter. The resulting microspheres can be attached to the distal end of an optical fiber in which the proximal end is attached to a spectrophotometer. Depending upon the organic species doped into the microsphere, a wide variety of sensing functions are possible. In this paper, the use of microsensors for measuring pH, temperature, and solvent content of aqueous solutions is demonstrated. Potential utility of this type of sensor to heavy metals detection and biomedical diagnostics is also discussed.

Citation Download Citation

Edward J. A. Pope "Fiber optic chemical microsensors employing optically active silica microspheres", Proc. SPIE 2388, Advances in Fluorescence Sensing Technology II, (8 May 1995); https://doi.org/10.1117/12.208484

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