19 January 1989 Bragg Effect Refractometer
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A novel optical waveguide refractometer is reported suitable for on-line and in situ monitoring of index of refraction. The device exhibits theoretical sensitivity dramatically higher than the sensitivity of the previously reported fiber optic refractometers. Based on the Bragg effect in the periodically corrugated dielectric waveguide, the refractometer can detect variations in the index of refraction of the medium in contact with the waveguide. It is found that more than two orders of magnitude higher theoretical sensitivity can be accomplished with the Bragg-type refractometer compared to the one based on the reflection principle.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Marek T. Wlodarczyk, Marek T. Wlodarczyk, "Bragg Effect Refractometer", Proc. SPIE 0990, Chemical, Biochemical, and Environmental Applications of Fibers, (19 January 1989); doi: 10.1117/12.959992; https://doi.org/10.1117/12.959992

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