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Multidimensional subwavelength position sensing using a semiconductor laser with optical feedback
2013
Optics Letters
We demonstrate experimentally how to harness quasi-periodic dynamics in a semiconductor laser with dual optical feedback for measuring subwavelength changes in each arm of the cavity simultaneously. We exploit the multifrequency spectrum of quasi-periodic dynamics and show that independent frequency shifts are mapped uniquely to two-dimensional displacements of the arms in the external cavity. Considering a laser diode operating at telecommunication wavelength λ ≈ 1550 nm, we achieve an average
doi:10.1364/ol.38.004331
pmid:24177086
fatcat:vk2a7jox2jblniickyldrzxmti