The article presents a rectangular core photonic crystal fiber (RCPCF) structure to detect the major components of blood. We used Topas as bulk fiber material for its extraordinary properties in the terahertz (THz) frequency region and the investigation is accomplished from 0.8 THz to 1.8 THz. The RCPCF sensor provides enriched relative sensitivity (almost 94.38%, 93.72%, 92.94%, 92.14%, and 90.8% for red blood cells (RBCs), hemoglobin (HB), white blood cells (WBCs), plasma, and water respectively at 1.8 THz frequency) with negligible confinement loss (only 2.75 × 10⁻¹³ cm⁻¹, 2.87 × 10⁻¹³ cm⁻¹, 3.06 × 10⁻¹³ cm⁻¹, 3.27 × 10⁻¹³ cm⁻¹, and 3.48 × 10⁻¹³ cm⁻¹ for RBCs, HB, WBCs, plasma, and water respectively at 1.8 THz frequency). Besides, the proposed sensor offers a large effective area (approximately 3.382 × 10⁵ μm², 3.436 × 10⁵ μm², 3.493 × 10⁵ μm², 3.551 × 10⁵ μm², and 3.613 × 10⁵ μm²for RBCs, HB, WBCs, plasma, and water respectivelyat 1.8 THz frequency). Also, this RCPCF sensor structure can be fabricated by utilizing the current fabrication techniques.

本文介绍了一种矩形芯光子晶体光纤（RCPCF）结构，用于检测血液的主要成分。我们将Topas用作散装纤维材料是因为其在太赫兹（THz）频率范围内具有非凡的性能，并且在0.8 THz至1.8 THz的频率范围内完成了研究。RCPCF传感器提供了丰富的相对灵敏度（在以下温度下，红细胞（RBC），血红蛋白（HB），白细胞（WBC），血浆和水分别达到94.38％，93.72％，92.94％，92.14％和90.8％。 1.8太赫兹频率）具有可忽略的限制损失（仅2.75×10 ^-13 厘米^-1，2.87×10 ^-13 厘米^-1，3.06×10 ^-13 厘米^-1，3.27×10 ^-13 厘米^-1，分别为1.8 THz频率的RBC，HB，WBC，血浆和水的3.48×10 ^-13  cm ^-1）。此外，所提出的传感器提供一个大的有效面积（约3.382×10 ⁵ 微米²，3.436×10 ⁵ 微米²，3.493×10 ⁵ 微米²，3.551×10 ⁵ 微米²，和3.613×10 ⁵ 微米²为红细胞， HB，WBC，血浆和水的频率分别为1.8 THz。而且，可以通过利用当前的制造技术来制造该RCCPF传感器结构。