Category: Repo

Modeling and Optimization of Fiber Optic Chemical Vapor Sensor

Posted on by 4dm1n_b3r

http://repository.uhamka.ac.id/id/eprint/17219/

Modeling and Optimization of Fiber Optic Chemical Vapor Sensor

Ramza, Harry

This paper discusses the application of Box–Behnken Design (BBD) to get a mathematical model for chemical vapor liquid detection with the objective of optimizing the optical fiber optic sensor probe. The parameters of input process were considered as variables to create the output parameters (response) using Response Surface Methodology (RSM). Input parameters such as length of probe, diameter of probe, photo-initiator liquid, vacuum pressure of chamber and purity of liquid detector were processed with Box – Behnken design approach for making POF (plastic optical fiber) probe of chemical sensor. Design Expert software was used to design the experiments with randomized runs. The main aim is to create an equation model as a platform for the probe design of POF chemical vapors detection similar to acetone, ethanol and methanol liquid. The experimental data were processed by considering the input parameters. The contribution of this research is the mathematic equation model that applies the polynomial equation. The final result of the wavelength application was between five to be three wavelengths, 434.05 nm, 486.13 nm and 656.03 nm. These wavelengths are the significant result of optimization measured using three chemical vapors. The optimization process uses the analysis of variables (ANOVA) to produce the quadratic model equation.

http://repository.uhamka.ac.id/id/eprint/17219/1/7-Modeling%20and%20Optimization%20of%20Fiber%20Optic%20Chemical%20Vapor%20Sensor.pdf

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Optical Sensing Performance of Multimode Polymer Optical Fiber (POF) Coated with ZnO towards Methanol Vapour

Posted on by 4dm1n_b3r

http://repository.uhamka.ac.id/id/eprint/17220/

Optical Sensing Performance of Multimode Polymer Optical Fiber (POF) Coated with ZnO towards Methanol Vapour

Ramza, Harry

In this work, optical sensing performance of multimode polymer optical fiber coated with ZnO towards methanol vapour with different concentrations is studied. The etching process of the POF was carried out using chemical etching method. ZnO was synthesized with sol-gel method to obtain the sensitive material coating. The etched optical fiber was then dipcoated with ZnO and dried at 70oC to enhance the binding of the materials and to remove organic residue. Scanning Electron Microscope (SEM), and X-Ray poer Difraction (XRD)analyses were performed to characterize the ZnO layer. The measurements of optical performance were taken using a spectrophotometer in the optical wavelength in the range of 500–8000nm. The absorbance response of the ZnO coated etched fiber reduced proportionally, upon exposure to methanol vapour with concentration in the range of 5%–5

http://repository.uhamka.ac.id/id/eprint/17220/1/9-Optical%20Sensing%20Performance%20of%20Multimode%20Polymer%20Optical%20Fiber%20%28POF%29%20Coated%20with%20ZnO.pdf

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Optical System Monitoring Based on Reflection Spectrum of Fiber Bragg Grating

Posted on by 4dm1n_b3r

http://repository.uhamka.ac.id/id/eprint/17221/

Optical System Monitoring Based on Reflection Spectrum of Fiber Bragg Grating

Ramza, Harry

Abstract: Problem statement: This study presents fiber fault monitoring approaches for Fiber-to-the Home (FTTH) with a Passive Optical Network (PON). Current fiber fault monitoring approaches are difficult to be implemented due to its complexity and high loss as the amount of branches increase.
Approach: A fiber fault monitoring scheme is proposed whereas Fiber Bragg Grating (FBG) is placed on each branch of the Optical Network Unit (ONU). The advantages of the scheme are that it is simple, low cost and efficient in monitoring fiber fault in ONU. FTTH based network design is simulated using Optisystemtem 8.0 in order to investigate the feasibility of the proposed scheme. Results: The reflection spectrum of Fiber Bragg Gratings (FBGs) with different spectrum shape, frequencies and amplitude is used to differentiate each optical network. The simulation result shows that the unique characteristic of fiber Bragg grating is able to distinguish each optical network for a 20 km Passive Optical Network (PON) system. Conclusion: This study suggests the implementation of Fiber Bragg Grating that is placed in each network instead of using Optical Time Domain Reflectometer (OTDR) for fiber fault monitoring.

http://repository.uhamka.ac.id/id/eprint/17221/1/10-Optical%20System%20Monitoring%20Based%20on%20reflection%20spectrum%20of%20Fiber%20Bragg%20Grating.pdf

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