In an optical fiber, the light that passes from the core into the cladding. See fiber optics glossary.
"evanescent field." YourDictionary, n.d. Web. 16 January 2019. <https://www.yourdictionary.com/evanescent-field>.
evanescent field. (n.d.). Retrieved January 16th, 2019, from https://www.yourdictionary.com/evanescent-field
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