Multiphoton absorption excited upconversion luminescence in multimode optical fiber
- Ferraro M.
- Mangini F.
- Zitelli M.
- Niang A.
- Tonello A.
- Couderc V.
- Wabnitz S.
Publication date
January 2020
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE) Language
EnglishAbstract
Shedding light on nonlinear loss occurring close to multimode optical fiber damage threshold, we demonstrate that multiple photons are absorbed by material defects and upconverted to shorter wavelength luminescence. An array of blue emitting points results from the spatial self-imaging in graded-index fibers
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