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 (${LP}_{01x}$ and ${LP}_{01y}$) 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

140 μm single-polarization passive fully aperiodic large-pitch fibers operating near 2 μm

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Appl. Opt. 56(33) 9221-9224 (2017)

Polarization-maintaining Yb-doped large-mode-area fully aperiodic large-pitch fibers

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Pre-compensation of thermally induced refractive index changes in a depressed core fully aperiodic large-pitch fiber for high average power operation

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Opt. Lett. 46(12) 2956-2959 (2021)

Highly efficient higher-order modes filtering into aperiodic very large mode area fibers for single-mode propagation

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