光子晶体光纤的全光纤纤芯变形研究

Core-shape transitions in photonic crystal fiber

利用有限差分光束传输法分析了全光纤纤芯变形光子晶体光纤中的模场分布以及能量损耗情况.实现了光子晶体光纤的选择性空气孔塌缩,制作了由小纤芯到大纤芯和圆形芯到矩形芯的纤芯变形光子晶体光纤,该光纤在波长1550nm下以小于0.05dB的能量损耗实现了光斑的整形.实验结果与模拟结果有很好的一致性.

The mode field and the translational efficiency are studied by the finite difference beam propagation method in an anamorphic photonic crystal fiber.Selective hole collapse is realized in laboratory and anamorphic fibers with circular to rectangular cores and small to large mode fields are made.The loss at wavelength 1550 nm is below 0.05 dB during each translation.The calculated and the experimental results are consistent with each other.