thesis photonic crystal fiber h2s gas sensor

20170801· A hydrogen sulfide gas sensor based on graphenecoated tapered photonic crystal fiber (GTPCF) MachZehnder interferometer (MZI) was proposed and experimentally demonstrated. The GTPCFMZI is formed by fusion splicing a short length of tapered PCF between two singlemode fibers. The air holes of PCF in the splicing regions are fully collapsed and so that it is conducive to the mode …

HollowCore Photonic Crystal Fiber Gas Sensing Ruowei Yu 1 , Yuxing Chen 1 , Lingling Shui 2 and Limin Xiao 1,3,4, * 1 Advanced Fiber Devices and Systems Group, Key Laboratory of Micro and Nano ...

Design and Characterization of Photonic Crystal Fiber Based Surface Plasmon Resonance Refractive Index Sensor Sayda Fahmida Kayser Student Id: 012181007 A Thesis in The Department of Computer Science and Engineering Presented in Partial Fulfillment of the Requirements For the Degree of Master of Science in Computer Science and Engineering United International University Dhaka, Bangladesh …

Request PDF | Terahertz detection of toxic gas using a photonic crystal fiber | The photon energies of molecules falling rightly into the terahertz region offers a high potential for gas detection.

Because of its confinement characteristics or capacity of confining light in hollow cores, which isn’t achievable with usual optical fibre, photonic very fibre has been utilized in fibre lasers, communications involving fibre optics, highpower transmission, nonlinear devices, and highly sensitive gas sensors amongst others (Bjarklev, Bjarklev, Broeng, 2003). Specific kinds of photonic very ...

An inline chemical gas sensor was proposed and experimentally demonstrated using a new Ctype fiber and a Gedoped ring defect photonic crystal fiber (PCF). The Ctype fiber segment served as a compact gas inlet/outlet directly spliced to PCF, which overcame previous limitations in packaging and dynamic responses. Ctype fiber was prepared by optimizing drawing process for a silica tube with ...

20190701· A novel design of circular photonic crystal fiber (CPCF) gas sensor is presented and analyzed by full vectorial finite element method. The suggested structure has a spiral porous Core region to achieve high light interaction with the applied gas. The geometrical parameters of the proposed sensor are studied to achieve high sensor sensitivity. The introduced CPCF offers high relative ...

20180614· Abstract. The development of highly sensitive and miniaturized sensors that capable of realtime analytes detection is highly desirable. Nowadays, toxic or colorless gas detection, air pollution monitoring, harmful chemical, pressure, strain, humidity, and temperature sensors based on photonic crystal fiber (PCF) are increasing rapidly due to its compact structure, fast response, and efficient ...

A hydrogen sulfide gas sensor based on graphenecoated tapered photonic crystal fiber (GTPCF) MachZehnder interferometer (MZI) was proposed and experimentally demonstrated. The GTPCFMZI is formed by fusion splicing a short length of tapered PCF between two singlemode fibers. The air holes of PCF in the splicing regions are fully collapsed and so that it is conducive to the mode coupling ...

We report the design and simulation of a high sensitivity H2S gas sensor using a combination of graphene properties as a hydrogen sulfidesensitive nanomaterial and features of photonic crystal ...

Abstract. Use of long period gratings (LPGs) formed in grapefruit photonic crystal fiber (PCF) with thinfilm overlay coated on the inner surface of air holes for gas sensing is demonstrated. The finiteelement method was used to numerically simulate the grapefruit PCF–LPG modal coupling characteristics and resonance spectral response with respect to the refractive index of thinfilm inside ...

Abstract: A plasmonic materialcoated circularshaped photonic crystal fiber (CPCF) sensor based on surface plasmon resonance (SPR) is proposed to explore the optical guiding performance of the re fractive index (RI) sensing at – µm. A twin resonance coupling profile is observed by selectively infiltrating liquid using finite element method (FEM). A nanoring gold layer with a ...

Photonic CrystalBased Sensing Substrates .....4 Photonic ResonatorBased Sensing Substrates.....6 Optical Fibers for Gas Sensor Design.....7 Sensing on the Fiber Tip .....9 Sensing Around the Fiber .....12 Sensing Inside the Fiber.....13 Problem Statement and Novelty of this Thesis.....15 Thesis Organizations.....16 References.....18 CHAPTER 2 ...

In this paper, a highly sensitive gas sensor based on the microstructure core and cladding photonic crystal fiber (PCF) is presented over the wavelength range from to μm, which is advantageous for sensor fabrication. The guiding properties of the proposed structure are dependent on geometrical parameters and wavelengths, which are numerically investigated by using a finite element ...

This thesis focuses on the investigation and development of an integrated optical biosensor based on enhanced Raman techniques that will provide labelfree detection of biomolecules. This is achieved by using hollow core photonic crystal fibers (HCPCF), nanoparticles, or both. HCPCF is a …

We report the modeling results of an allfiber gas detector that uses photonic crystal fiber (PCF). The relative sensitivity of the PCF as a function of the fiber parameters is calculated. Gasdiffusion dynamics that affect the sensor response time is investigated theoretically and experimentally. A practical PCF sensor aiming for high sensitivity gas detection is proposed.

AN ACTI E CORE FIBER OPTIC GAS SENSOR USING A PHOTONIC CRYSTAL HOLLOW CORE FIBER AS A TRANSDUCER By enkata Satya Sai Sarma Tipparaju A Thesis Submitted to the Faculty of Mississippi State University in Partial Fulfillment of the Requirements for the Degree of Master of Science in Physics in the Department of Physics and Astronomy Mississippi State, Mississippi August, 2007 …

Type: Master''s thesis Year: 2006 Downloads: 432 Quote: 1 Read: Download Dissertation. Abstract. Photonic crystal fiber as one of the focus of the current field of optoelectronic devices , in addition to its light guide mechanism , preparation methods and basic nature has been extensively studied , its application has gradually become the focus of the study ; In this paper, both from the ...

20140701· PDF | We have demonstrated a distributed gas detection system by using hollowcore photonic crystal fiber (HCPCF) as a gas chamber. The HCPCF gas... | …

20140601· An optical fiber gas sensor using hollowcore photonic bandgap fiber as a gas cell is proposed to detect H 2 S mixed with natural gas. This sensor is advantageous for eliminating instability of light source, impact of thermal zero drift, and zero shift of photoelectric device. The gas sensing probe of configuration is using two shorter pieces of hollowcore photonic bandgap fiber (HCPBF) with ...

20070202· Photoacoustic Photonic Crystal Fiber Gas Sensor by Raymond Chen Submitted to the Department of Electrical Engineering and Computer Science February 2, 2007 In Partial Fulfillment of the Requirements for the Degree of Master of Engineering in Electrical Engineering and Computer Science Abstract Photoacoustic spectroscopy (PAS) is a form of laser spectroscopy that has demonstrated …

Abstract A hydrogen sulfide gas sensor based on graphenecoated tapered photonic crystal fiber (GTPCF) MachZehnder interferometer (MZI) was proposed and experimentally demonstrated. The GTPCFMZI is formed by fusion splicing a short length of tapered PCF between two singlemode fibers. The air holes of PCF in the splicing regions are fully collapsed and so that it is conducive to the mode ...

We proposed and experimentally demonstrated a highly sensitive salinity sensor using a polyimidecoated HiBi photonic crystal fiber Sagnac interferometer based on the coating swelling induced radial pressure. This is the first time to exploit fiber coating induced pressure effect for salinity sensing. The achieved salinity sensitivity /(mol/L), which is45times more sensitive than ...