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Optical Fibre Mode Structures Measured by Collection Mode Near-Field Scanning Optical Microscopy |
| TANG Lin;BAI Ming;MING Hai;XIE Jian-Ping |
| Department of Physics, University of Science and Technology
of China, Hefei 230026 |
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| Cite this article: |
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TANG Lin, BAI Ming, MING Hai et al 2003 Chin. Phys. Lett. 20 1456-1458 |
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Abstract High order fibre mode structures are measured by a near-field scanning optical microscope (NSOM) and are determined to be consistent with the standard fibre LP patterns. The mode-field distortions of high-order mode LP11 and LP21 structures by far-field measurement are analysed based on scalar diffraction theory, and the max distortions may reach as high as 5.1% and 6.2%. This shows that the method of using the NSOM is more accuracy than the far-field measurement method, especially for high-order mode structures of optical fibres.
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| Keywords:
07.79.Fc
42.81.Cn
42.30.Va
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Published: 01 September 2003
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| PACS: |
07.79.Fc
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(Near-field scanning optical microscopes)
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42.81.Cn
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(Fiber testing and measurement of fiber parameters)
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42.30.Va
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(Image forming and processing)
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