Coupling-Ratio-Tunable Photonic Crystal Fiber Coupler

Citation

王兆芳 (Wang Zhaofang), 卜胜利 (Pu Shengli), 苏德龙 (Su Delong), & 毛连敏 (Mao Lianmin). (2017, March). 分光比可调的光子晶体光纤耦合器 (Coupling-Ratio-Tunable Photonic Crystal Fiber Coupler). 光学学报 (Acta Optica Sinica), 37(3). doi:10.3788/AOS201737.0306003

Keywords

• Photonic crystal fiber coupler
• Coupling ratio tunable
• Magnetic fluid clad
• Magnetic field
• Online tuning
• Coupling area size
• Fused biconical taper (熔融拉锥)
• Air holes (空气孔)
• Mode field distribution (模场分布)
• Numerical simulation (数值模拟)
• Transmission loss (传输损耗)
• Temperature sensitivity (温度敏感性)
• Environmental temperature (环境温度)

Brief

The article experimentally studies a magnetic-fluid-clad photonic crystal fiber coupler whose coupling ratio can be tuned online by a magnetic field, with the sensitivity of this tuning being dependent on the coupler's coupling area size and also being affected by temperature.

Summary

This study experimentally demonstrates a magnetic-fluid-clad photonic crystal fiber coupler where the coupling ratio can be tuned online using a magnetic field. Smaller coupling areas show higher sensitivity to the magnetic field, achieving a sensitivity of 0.0289 m T⁻¹ for a 27 μm coupling area under a 0-14 mT magnetic field. However, smaller coupling areas also exhibit increased sensitivity to ambient temperature, with a relative change of about 29.6% in the splitting ratio for a 27 μm coupler in the 25-65°C range. The research highlights the trade-off between magnetic tunability and temperature response for practical applications of such couplers.

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