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Showing 1 to 1 of 1 for “"multilongitudinal mode laser diode"”.
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Extrinsic Fabry-Perot Interferometer System Using Wavelength Modulated Source
… overcome. By scanning the output wavelength of a multilongitudinal mode laser diode through current modulation, the EFPI sensor signal is scanned through multiple fringes. Gap movement is then unambiguously determined by monitoring the phase of the multiple fringe pattern.