A temperature-compensated material of fiber Bragg grating (FBG), which has negative thermal-expansion coefficients, has been presented. The temperature coefficient of FBG's center wavelength is less than 0.0005nm/°C after three-layers-structure package under tension. For the first time, PMD of temperature-compensated FBG have been detailedly studied. The PMD of temperature-compensated FBG has been measured from -20°C to 60°C. The measured result shows that the PMD has little changed at different temperature.
Polarization-related impairments have become a critical issue for high-data-rate optical systems, particularly when considering polarization-mode dispersion (PMD). Consequently, compensation of PMD, especially for the first-order PMD is necessary to maintain adequate performance in long-haul systems at a high bit rate of 10 Gb/s or beyond. In this paper, we successfully demonstrated automatic and tunable compensation for first-order polarization-mode dispersion. Furthermore, we reported the statistical assessment of this tunable compensator at 10 Gbit/s. Experimental results, including bit error rate measurements, are successfully compared with theory, therefore demonstrating the compensator efficiency at 10 Gbit/s. The first-order PMD was max 274 ps before PMD compensation, and it was lower than 7ps after PMD compensation.
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