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Tunable Laser Wavelength Calibration for Fiber Sensing

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Dr. Christopher J. Myatt and Nicholas G. Traggis, Precision Photonics Corp.

Monitoring the wavelength reflected from a fiber Bragg grating can be achieved using tunable laser technology combined with absolute wavelength referencing. Laser sources are preferred for applications such as overseeing the operating conditions of oil wells, because their spectral power density yields high signal-to-noise levels. This method works by sweeping a narrowband tunable laser source over the spectral range, including the fiber Bragg grating’s spectral peak. The laser wavelength measurement module records the wavelength of the scanning laser, while the power meter records a peak...Read full article

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    Published: October 2003
    Glossary
    fiber bragg grating
    A fiber Bragg grating (FBG) is a type of optical filter that is inscribed or "written" into the core of an optical fiber. It consists of a periodic modulation of the refractive index along the length of the fiber. This modulation forms a grating structure that reflects a specific wavelength of light while transmitting others. Key features of FBGs include: Periodic modulation: The refractive index of the optical fiber's core is periodically modulated, creating a series of alternating high...
    Basic ScienceCommunicationsFeaturesfiber Bragg gratingindustrialSensors & DetectorsTunable Lasers

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