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光子晶体光纤的拉锥是实现光子晶体光纤潜在应用价值的重要技术手段。通过优化普通光纤拉锥机的参数,利用“快速低温”拉锥法有效控制了光子晶体光纤空气孔的相对塌缩。实验中实现了两种不同光子晶体光纤的拉锥,光纤外径分别从原来的125μm拉锥到50μm和30μm,光纤的孔直径和孔间距之比基本保持不变,拉锥损耗小于0.4 dB。基于普通熔融拉锥机的光子晶体光纤低损耗拉锥为光纤器件的制作奠定了基础。
The taper of photonic crystal fiber is an important technical means to realize the potential application value of photonic crystal fiber. By optimizing the parameters of the ordinary fiber optic taper, the relative collapse of air holes in the photonic crystal fiber can be effectively controlled by using the “fast low temperature” taper method. In the experiments, the taper angles of two different photonic crystal fibers were obtained. The outer diameter of the optical fiber was changed from the original 125μm taper cone to 50μm and 30μm respectively. The ratio of the hole diameter to the hole pitch of the fiber remained almost unchanged, and the taper loss was less than 0.4 dB. The low-loss taper of photonic crystal fiber based on ordinary melting taper machine has laid the foundation for the fabrication of optical fiber device.