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13 February 1990 An Accurate, Low-Cost, Easily-Manufacturable Oxygen Sensor
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A low cost, disposable fiber-optic based sensor, capable of in vitro and in vivo monitoring of oxygen partial pres-sure has been developed as part of a continuous blood monitoring system. The uniqueness of the sensor is its easy manufacturability. A specific length of the polymeric cladding at the fiber tip is removed and the glass core is recladded by a dipping process whereby a fluorescent dye, immobilized in a vulcanizable, gas-permeable polymer is applied. By adjusting the refractive index of the recladding material, highly efficient coupling of the fluorescent light is realized. The sensor is then coated with a reflective material to capture the fluorescent light. Signal to blank ration of > 300 is consistently achievable. Sensors fabricated in this manner are found to be durable, exhibit low susceptibilities to mechanical perturbation, and demonstrate superior response times.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Henry K. Hui, Skip Divers, Terry Lumsden, Tom Wallner, and Steve Weir "An Accurate, Low-Cost, Easily-Manufacturable Oxygen Sensor", Proc. SPIE 1172, Chemical, Biochemical, and Environmental Fiber Sensors, (13 February 1990);

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