光子晶体光纤环偏振耦合强度温度特性实验研究

Experimental Study of Temperature Characteristics of Polarization Coupling Intensity of Photonic Crystal Fiber Coil

以光子晶体光纤环为研究对象,利用白光干涉仪测试了不同温度下保偏光子晶体光纤环和普通保偏光纤环内部的偏振交叉耦合强度分布,分析了光纤环中固定耦合点不同温度下的偏振耦合强度变化。结果表明,在-40℃~50℃的温度条件下,保偏光子晶体光纤环偏振耦合强度最大变化率为0.97%;普通保偏光纤环偏振耦合强度的变化率为4.71%,约为保偏光子晶体光纤环的5倍。实验研究证明,光子晶体光纤环的偏振交叉耦合强度温度稳定性高于普通保偏光纤环的偏振交叉耦合强度的温度稳定性。

Photonic crystal fibers （PCFs） are investigated. The polarization cross-coupled distributions of both polarization-maintaining photonic crystal fiber coil and ordinary polarization-maintaining fiber coil are tested at various temperatures utilizing white light interferometers. Changes of polarization coupling intensities of fixed polarization cross-coupled points in fiber coils at different temperatures are also analyzed. The obtained results show that, in the temperature range between -40 22 and 50 22, the maximum change rate of polarization coupling intensity of photonic crystal fiber coil is 0.97%, while that of ordinary polarization maintaining fiber coil is 4.71%, which is almost five times as the former one. Thus it can be concluded that the coupling intensity of photonic crystal polarization maintaining fiber coil possesses better stability against temperature changes than that of ordinary polarization-maintaining fiber coil.