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Meadowlark Optics - Wave Plates 6/24 LB 2024

Michelson Interferometry Interrogates Fiber Bragg Grating Sensors

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Tony Amarel and William Gornall, Exfo Burleigh Products Group Inc.

Fiber Bragg gratings, which have had such success in wavelength division multiplexing for telecommunications, also have been adapted to environmental sensors. These sensors measure parameters such as temperature, pressure and strain, which cause shifts in the peak of the spectrum reflected from the grating. Because the required information from a fiber Bragg grating sensor is carried with the wavelength of the reflected optical signal, the method of measuring the absolute wavelength is a critical part of a fiber optic sensing system. One approach to determining the precise peak wavelength...Read full article

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    Published: October 2003
    Glossary
    wavelength
    Electromagnetic energy is transmitted in the form of a sinusoidal wave. The wavelength is the physical distance covered by one cycle of this wave; it is inversely proportional to frequency.
    wavelength division multiplexing
    A system that allows the transmission of more than one signal over a common path, by assigning each signal a different frequency band. Also known as frequency division multiplexing.
    Communicationsenvironmental sensorsFeaturesfiber Bragg gratingsMichelson interferometerSensors & Detectorswavelengthwavelength division multiplexing

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