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An erbium-doped fibre laser with a 900 m-long cavity has been tuned by a combination of a rotating mirror and a bulk optical grating. A stable modelocked pulse train is obtained over the 1522–1564 nm wavelength region. To monitor an FBG sensor array, wavelength-division multiplexing and time-division multiplexing are combined.
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Wan et al. (2003) studied this question.
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