Design and optimization of photonic crystal fiber for liquid sensing applications

Abstract

This paper proposes a hexagonal photonic crystal fiber (H-PCF) structure with high relative sensitivity for liquid sensing; in which both core and cladding are microstructures. Numerical investigation is carried out by employing the full vectorial finite element method (FEM). The analysis has been done in four stages of the proposed structure. The investigation shows that the proposed structure achieves higher relative sensitivity by increasing the diameter of the innermost ring air holes in the cladding. Moreover, placing a single channel instead of using a group of tiny channels increases the relative sensitivity effectively. Investigating the effects of different parameters, the optimized structure shows significantly higher relative sensitivity with a low confinement loss.

Extremely sensitive chemical sensor for terahertz regime based on a hollow-core photonic crystal fibre

“…3 demonstrates that the relative sensitivity of our HC-PCF-based sensor for benzene, ethanol and water is 98.5, 98.2 and 97.6% at 2.4 THz. This is better than the values reported in the previous works [5][6][7][8][9][10][11]. Im…”

“…The refractive index of benzene, ethanol and water used as analytes in our study are respectively equal to 1.366, 1.354 and 1.33 (see Refs. [5][6][7][8][9][10][11]).…”

“…In particular, over the last decades the researchers have proposed a number of sensors based upon photonic crystal fibres (PCFs) for identification of various gases and liquids. Different types of porous-core microstructure fibres have been devised [5][6][7][8], with the relative sensitivity typically not exceeding 75%. Very recently, Islam et al suggested a slotted-core kagome-lattice microstructure fibres [9] which offer the maximal relative sensitivity as high as 86% for the case of benzene.…”

Design and Optimization of Highly Sensitive Photonic Crystal Fiber with Low Confinement Loss for Ethanol Detection

“…Arrangement of the tiny holes in the core region and filling them with materials demonstrates the complexity of our proposed PCFs and it might be possible drawback of our proposed PCF structures. However, due to the progress of nanotechnology, the fabrication of our proposed PCFs is possible (Arif et al,2016;Morshed et al, 2015b).…”

Photonic Crystal Fiber Based Sensor for Detecting Binary Liquid Mixture

“…It has remarkable characteristics such as small size, free from electrical interference, geometric versatility, improved sensitivity and inherent compatibility with respect to fiber optic telecommunications making it outstanding for opto-devices [2] [3]. PCFs can be used for variety of sensing applications such as, physical sensor, gas sensor, chemical sensor, liquid sensor, electrical and magnetic field sensor, humidity, temperature, pressure sensor, biomedical properties sensor and so on [3].…”