A new procedure to obtain single-polarization single-mode polymeric optical fibers is reported. The selective polarization confinement loss mechanism is obtained by applying external hydrostatic pressure in a specially designed side-hole microstructured polymer optical fiber. It is shown that, at λ = 588 nm, pressure around 380 bar allows inducing confinement loss as high as 35dB/m for one polarization state while the other is guided with low loss (3 x 10<sup>-3</sup> dB/m). The loss mechanism is shown to be related to coupling between the fundamental core modes and the cladding modes of the pressurized fiber. Finally, the possibility of tuning the single-polarization single-mode state with the input wavelength with fixed pressure or by introducing small changes in the inner ring of holes of the fiber cross section is presented.
© 2011 IEEE
Yovanny A. V. Espinel, Marcos A. R. Franco, and Cristiano M. B. Cordeiro, "Tunable Single-Polarization Single-Mode Microstructured Polymer Optical Fiber," J. Lightwave Technol. 29, 2372-2378 (2011)