Three different Photonic Crystal Fiber (PCF) gas sensors are designed to detect five different gases for a wide range of wavelengths. The three unique configurations are designed based on four outer Elliptical cores PCF (4E-PCF), four outer Circular cores (4C-PCF) PCF, and different Eight Elliptical cores PCF (8E-PCF) to analyze and sense the light interface with applied gases. For three proposed gas sensors, the sensing parameters for five different hazardous gases, such as relative sensitivity, effective area, birefringence and dispersion, are acquired. The five different gases considered in the sensor investigation are Sulfur trioxide [SO₃] (20 °C), Tetracholorosilane [SiCl₄], Tetracholoromethane [CCl₄], Turpentine [C₁₀H₁₆], Tin Terra chloride [SnCl₄]. Among the three designs, 8E-PCF yields a maximum sensitivity of 75.75%, an effective area of 2.45μm², and a birefringence of 0.0421 for SnCl₄ gas.

三种不同的光子晶体光纤 (PCF) 气体传感器设计用于检测五种不同气体的各种波长。三种独特的配置是基于四个外椭圆芯 PCF (4E-PCF)、四个外圆芯 (4C-PCF) PCF 和不同的八椭圆芯 PCF (8E-PCF) 设计的，用于分析和感应光接口与应用气体。对于所提出的三种气体传感器，获取了五种不同有害气体的传感参数，例如相对灵敏度、有效面积、双折射和色散。传感器研究中考虑的五种不同气体是三氧化硫 [SO ₃ ] (20 °C)、四氯硅烷 [SiCl ₄ ]、四氯甲烷 [CCl ₄ ]、松节油 [C ₁₀ H₁₆ ]，Tin Terra 氯化物 [SnCl ₄ ]。在这三种设计中，8E-PCF的最大灵敏度为75.75%，有效面积为2.45μm ²，对SnCl ₄气体的双折射为0.0421。