6 October 2005 Optical mode field transformers integrated at the end of single mode fibers
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In this paper we present the fabrication of optical mode field adaptors for fiber optical communications devices in combination with a new method for spot size measurement for single mode optical components. At the end of standard single mode fibers we have manufactured reproducible mode field transformers with diameters from 5 μm to 90 μm. Additionally, we present a new planar optical field characterization method. BPM simulations are performed to predict the spot sizes at different fiber end diameters. Based on the measurement of a singlemode fiber in accordance with ITU Recommendation G.652 the efficiency is demonstrated and discussed.
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Th. Windel, S. Hemrungrote, U. H. P. Fischer, "Optical mode field transformers integrated at the end of single mode fibers", Proc. SPIE 5948, Photonics Applications in Industry and Research IV, 59481S (6 October 2005); doi: 10.1117/12.621068; https://doi.org/10.1117/12.621068

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