Abstract
We report on the fabrication of a birefringent microstructured PMMA fiber with polystyrene stress-applying elements located in the solid part of the cladding. A microstructured part of the cladding composed of three rings of holes was made of a technical-grade PMMA by a drilling method. The fiber shows a relatively high birefringence of the order of 4×10(-5), which weakly depends upon wavelength in the investigated spectral range from 0.6 to 1 μm. The cross talk between polarization modes is lower than -20 dB for a 1 m long fiber, while the fiber loss is about 8 dB/m at 0.83 μm. We also studied the fiber response to temperature in the range from 20°C to 60°C. The temperature induced birefringence change is negative and shows a significant hysteresis in the first cycle, which gradually disappears in successive cycles.
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