Abstract

Two evolutions of fully aperiodic large-pitch fiber designs employing few stress-applying parts are presented. The induced elasto-optic stress discriminates the two orthogonal polarization modes (LP01x and LP01y) of the fundamental mode, selectively delocalizing one of them into the cladding via a suitable coupling to one or several cladding modes. This ensures the propagation of a single linear polarization mode. For the largest core dimensions, however, the applied stress can strongly influence the intensity distributions of core modes, and a tailored design process must thwart this. The polarization properties are investigated experimentally with core scalability over a large spectral bandwidth into passive structures, leading to the evidencing of a single-mode single polarization over a large span from 1 to 1.6 μm with a core dimension of 80 μm and, notably, at 1400 nm for a core dimension of 140 μm. The polarization extinction ratio is also determined.

© 2017 Optical Society of America

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Supplementary Material (2)

NameDescription
» Visualization 1: MP4 (2062 KB)      Experimental intensity variation of the fundamental mode when rotating the polarizer on a 60 µm core diameter fiber at 1 µm.
» Visualization 2: MP4 (1098 KB)      Intensity pattern measured at the output of a 60 µm core diameter “6SAP” fiber when the launching conditions are modified by voluntarily translating the seed.

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