A vertical photonic crystal fiber (V-PCF) and a horizontal PCF (H-PCF) are designed for the detection of sulfur dioxide (SO₂) in this paper. A demanding numerical investigation is carried out in a wider range of wavelengths from 0.8 to 1 μm. SO₂ is a major contributor to air pollution, which is responsible for asthma and cancer. The optical parameters are analyzed by using the finite element method (FEM) which consumes a completely circular isotropic perfectly matched layer (PML). The designed V-PCF sensor test is performed with different PML radius values, different elliptical constants for the inner cladding, the outer cladding layer, and the core. The higher relative sensitivity of 59.34% makes this proposed V-PCF a good design for SO₂ detection.

本文设计了垂直光子晶体光纤 (V-PCF) 和水平光子晶体光纤 (H-PCF) 来检测二氧化硫 (SO ₂ )。在从 0.8 到 1 μm 的更宽波长范围内进行了一项苛刻的数值研究。SO ₂是空气污染的主要原因，空气污染是导致哮喘和癌症的罪魁祸首。通过使用完全圆形各向同性完美匹配层 (PML) 的有限元方法 (FEM) 来分析光学参数。设计的 V-PCF 传感器测试是在不同的 PML 半径值、不同的内包层、外包层和纤芯的椭圆常数下进行的。59.34% 的较高相对灵敏度使该提议的 V-PCF 成为 SO ₂检测的良好设计。