โ Scribed by J. Niewisch; H. Bartelt
No coin nor oath required. For personal study only.
OpbGd fiber sensors offer great potenbd for the survedlance of extended areas or a large number of measurement pomts Dmtnbuted sensor concepts or arrays of sensors connected by optuxd libers can be used for this purpose Important apphcabons are found espenally m an mdustrml emonment wrth strong electromagnebc mterference A typical example IS &stnbuted temperature sensmg usmg temperature dependent scattermg effects III an opbcal fiber. Local resolubon 1s achieved usmg the concept of opbcal tune domam reflectometry (OTDR) A short hght
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We report on sensitivity control of fiber optic sensors using microbend long-period fiber gratings. By tuning the phase difference between a pair of periodically aligned rod arrays that sandwiches a single-mode fiber, we can change the coupling strength of the core mode with radiating cladding modes
## Aquocyanocobmanude was used as a selechve reagent m the development of a fiber-optc gas sensor for NO, TIus reagent was trapped m front of a bifurcated fiber-optic bundle by using a gas-permeable membrane NO, species were generated by the addition of a known amount of mtrite to an aclchc sample
We have developed a novel fiber sensor array telemetry that uses multiple all-fiber, all-optical switches for time domain multiplexing. Incorporating optical switches improves the telemetry by connecting only one sensor at a time to the buses and thus delivering the largest possible signal power to