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分析了双空芯光子晶体光纤(HC-PCF)在纤芯填充液态高折射率温敏物质后的传输特性,应用全矢量有限元法(FEM)研究温度均匀变化时光纤耦合特性、模间色散特性的变化规律。结果表明,在特定温度下,耦合特性随传输波长的增大呈现出先减弱、后增强的变化趋势,且光纤的模间色散存在过零点。通过调节温度或占空比,可以在1.31μm和1.55μm两个常用通信波段内实现零模间色散传输,由此能够完全消除模式间相位不匹配导致的脉冲失真,实现能量的完全交换。
The transmission characteristics of double hollow core photonic crystal fiber (HC-PCF) after the core-filled liquid high refractive index thermal sensitive material was analyzed. The coupling characteristics of the fiber, the mode dispersion Characteristics of the law of change. The results show that the coupling characteristic decreases first and then increases with the increase of transmission wavelength at a certain temperature, and there is a zero-crossing point in the mode dispersion of the optical fiber. By adjusting the temperature or the duty cycle, the zero-mode dispersion transmission can be realized in the two common communication bands of 1.31μm and 1.55μm, thereby completely eliminating the pulse distortion caused by the phase mismatch between modes and realizing the complete exchange of energy.