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El Sayed, Ali; Pilz, Sönke; Ryser, Manuel; Romano, Valerio (2016). Two-dimensional refractive index profiling of optical fibers by modified refractive near-field technique. In: Jiang, Shibin; Digonnet, Michel J. F. (eds.) Optical Components and Materials XIII. Proceedings of SPIE: Vol. 9744 (97440N). SPIE 10.1117/12.2211002