Titlebook: Optical Fiber Sensor Technology; Devices and Technolo K. T. V. Grattan (Professor of Measurement and Ins Book 1998 Springer Science+Busines

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convulsion

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Fiber Bragg grating sensors: principles and applications,ted with a coherent ultraviolet (UV) source. Versatility in the fabrication of FBGs has been gained from the fact that the Bragg wavelength is independent of the writing laser used. Subsequent to this initial work the interest in FBGs has increased considerably in recent years.

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Fiber Bragg grating sensors: signal processing aspects,oil and capacitance strain gauges and thermocouple temperature probes, are limited in their applicability since they are not easily multiplexed in large sensor arrays and are often susceptible to heavy electromagnetic interference (EMI) and measurement drift and offset especially when operated in hostile environments.

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Multiplexing optical fiber sensors,rovide some practical examples. We shall concentrate on multiplexing techniques for single-mode optical fiber systems, especially those based on interferometry, where multiplexing is arguably most highly developed.

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Interferometric vibration measurement using optical fiber,e over which these measurements are required can span several orders of magnitude. It is not unusual for a measurement system to be required to respond to vibrations over the range 1 Hz to 1 MHz, with amplitudes ranging from a few millimeters to a sub-ångström (1 × 10. m) making this a very demanding measurement.

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R. P. Tatamstoffquellen, organische und anorganische Stickstoffquellen, verschiedenste anorganische Salze und oft auch organische Schadstoffe und Schwermetalle sind Inhaltsstoffe solcher Wässer. Damit wird erheblicher Einfluß auf das Wachstum und die Zusammensetzung der Mikroorganismen-Population genommen. Zud

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K. Weir,B. T. Meggittstoffquellen, organische und anorganische Stickstoffquellen, verschiedenste anorganische Salze und oft auch organische Schadstoffe und Schwermetalle sind Inhaltsstoffe solcher Wässer. Damit wird erheblicher Einfluß auf das Wachstum und die Zusammensetzung der Mikroorganismen-Population genommen. Zud