Measurement of submicrometre diameters of tapered optical fibres using harmonic 
generation

Wiedemann, U.; Karapetyan, K.; Dan, C.; Pritzkau, D.; Alt, W.; Irsen, S.; Meschede, D.

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Measurement of submicrometre diameters of tapered optical fibres using harmonic generation

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Irsen, S.
Electron Microscopy and Analytics, Center of Advanced European Studies and Research (caesar), Max Planck Society;

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Citation

Wiedemann, U., Karapetyan, K., Dan, C., Pritzkau, D., Alt, W., Irsen, S., et al. (2010). Measurement of submicrometre diameters of tapered optical fibres using harmonic generation. Optics Express, 18(8), 7693-7704.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0028-60E4-E

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. (C)2010 Optical Society of America