Oscillatory light loss within the cladding of a straight optical fiber: comparison with whispering-gallery modes.
Light propagating within the cladding of a straight optical fiber exhibits wavelength-dependent oscillatory loss that resembles the whispering-gallery modes of a bent fiber. This novel observation can be explained by interference of light only within the cladding and the buffer without any influence of the fiber core. The technique promises applications similar to those that are due to whispering-gallery modes but without the additional requirement of having a bent fiber.
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