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Optica Publishing Group
  • International Quantum Electronics Conference
  • 1996 OSA Technical Digest Series (Optica Publishing Group, 1996),
  • paper TuL91

Near field imaging of optical fibres and waveguides

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Abstract

Near field imaging is a technique that allows us to achieve resolution up to an order of magnitude below that of conventional far field optical microscopy. Since the imaging is performed at optical wavelengths it retains many of the advantages of optical microscopy while simultaneously eliminating the major disadvantage, posed by the diffraction limit. The resolution of this system is governed primarily by the size of the aperture used to collect the light and the distance between the scanning aperture and the sample. Hence by fabricating apertures smaller than the wavelength of light used, we obtain sub-wavelength resolution. In addition, near field imaging also allows the evanescent fields from surface waveguides and D-fibres to be measured directly.

© 1996 Optical Society of America

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