Measuring the refractive-index profile of optical fibers by the cladding-mode near-field technique.
A new measurement system has been developed that simply determines the refractive-index profile of any optical fiber by analyzing the propagation of cladding modes. Measurement accuracy was verified by a comparison with the refractive near-field method, and a sufficient resolution level was achieved to produce the fine structural details in single-mode fibers.
Hatton
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Buckland
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Nishimura
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