Fiber optic refractive index sensor using a metal clad

Details Fiber optic refractive index sensor using a metal clad Fiber optic refractive index sensor using a metal clad

1988-01-29

1990-05-29

Lee, John D.

350 9634, G02B 616

Patent

active

049290495

ABSTRACT:
A refractive index FOCS has a thin metal film clad on a fiber optic core so that transmission through the core is strongly affected by the refractive index of a surrounding solvent. The clad is made of platinum, or also of gold, rhodium or palladium. With a fluorescent tip, the changes in the fluorescent signal are a measure of the solvent refractive index. With a reflective tip, the changes in the reflected signal are measured. In a linear configuration, source and detector are placed at opposite ends of the fiber and changes in the transmitted signal are measured as a function of solvent refractive index.

REFERENCES:
patent: 4418984 (1983-12-01), Wysocki et al.
patent: 4476870 (1984-10-01), Peterson et al.
patent: 4600310 (1986-07-01), Cramp et al.
patent: 4695123 (1987-09-01), Chang et al.
patent: 4781458 (1988-11-01), Angel et al.

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