@article{2010-wiedemann-meschede-opt-exp-v18-p7693, Abstract = {Applications of subwavelength-diameter optical fibres in nonlinear optics require precise knowledge of the submicrometre fibre waist diameter. We demonstrate a new technique for optical measurement of the diameter based on second- and third-harmonic generation with an accuracy of better than 2%. To generate the harmonic light, inter-modal phase matching must be achieved. We find that the phase-matching condition allows us to unambiguously deduce the fibre diameter from the wavelength of the harmonic light. High-resolution scanning electron microscope imaging is used to verify the results.}, Author = {Wiedemann, U. AND Karapetyan, K. AND Dan, C. AND Pritzkau, D. AND Alt, W. AND Irsen, S. AND Meschede, D.}, Journal = {Opt. Express}, Pages = {7693}, Title = {{Measurement of submicrometre diameters of tapered optical fibres using harmonic generation}}, Volume = {18}, Year = {2010} }