Rancang Bangun Sensor Konsentrasi Minyak Babi Pada Minyak Nabati Menggunakan Serat Optik Berstruktur Singlemode-Taper Multimode-Singlemode (STMS)

Lesa, Astrid Denaya (2021) Rancang Bangun Sensor Konsentrasi Minyak Babi Pada Minyak Nabati Menggunakan Serat Optik Berstruktur Singlemode-Taper Multimode-Singlemode (STMS). Masters thesis, Intitut Teknologi Sepuluh Nopember.

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Abstract

Telah diusulkan rancang bangun sensor konsentrasi minyak babi pada minyak nabati menggunakan serat optik berstruktur Singlemode-Taper multimode-Singlemode (STMS). Struktur sensing probe yang digunakan dalam penelitian ini adalah sambungan serat optik Singlemode-Multimode-Singlemode (SMS) yang bagian Multimode dibuat dengan konfigurasi taper. Dalam penelitian ini, struktur taper digunakan untuk meningkatkan sensitivitas SMS. Parameter yang mempengaruhi kinerja dari sensor antara lain adalah diameter core dan panjang area taper. Struktur taper dibuat dengan metode etsa melalui proses perendaman serat Multimode pada SMS ke dalam larutan Hydrofluoric (HF). Lama waktu perendaman divariasikan 0, 5,10,15 dan 20 menit. Metode etsa kimia menggunakan larutan HF memiliki potensi besar sebagai metode sederhana untuk mencapai radius yang lebih kecil tanpa memperpanjang serat Multimode, dimana diameter optimum dapat diperoleh sebesar 62.4um dengan lama waktu perendaman 15 menit dan panjang area taper 1cm. Performansi dari sensor konsentrasi minyak babi pada minyak nabati diperoleh dari informasi karakteristik khas tiap sampel uji yang menunjukkan sensitivitas sensor dari adanya perubahan intensitas dan pergeseran spektrum yang dinyatakan dengan kemiringan (slope) grafik hubungan antara konsentrasi campuran minyak babi pada minyak nabati terhadap daya keluaran.
Kata kunci : Sensor serat optik, STMS, metode etsa kimia, sensitivitas
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It has been proposed to design and fabrication a sensor for lard concentration on edible oil using an optical fiber with a Singlemode-Taper Multimode-Singlemode (STMS) structure. The structure of the sensing probe used in this study is a Singlemode-Multimode-Singlemode (SMS) optical fiber connection in which the multimode section is made with a taper configuration. In this study, a taper structure was used to increase the sensitivity of SMS. Parameters that affect the performance of the sensor include the diameter of the core and the length of the taper area. The taper structure was made by etching method by immersing multimode fiber in SMS into Hydrofluoric (HF) solution. The immersion time was varied 0, 5, 10, 15 and 20 minutes. The chemical etching method using HF solution has great potential as a simple method to achieve a smaller of core radius without extending the length of multimode fiber, where the optimum core diameter can be obtained of 62.4um with an immersion time of 15 minutes and a taper area length of 1cm. The performance of the lard concentration of the sensor in edible oil is obtained from the information on the typical characteristics of each test sample which shows a change in intensity and a shift in the spectrum which is expressed by the slope of the graph of the relationship between the concentration of the mixture of lard oil in edible oil and the output power.
Keywords: fiber optik sensor, STMS, chemical etching method, sensitivity

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Sensor serat optik, STMS, metode etsa kimia, sensitivitas, fiber optic sensor, STMS, chemical etching method, sensitivity
Subjects:	Q Science > QC Physics > QC448 Fiber optics.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30101-(S2) Master Thesis
Depositing User:	Astrid Denaya Lesa
Date Deposited:	13 Sep 2021 04:51
Last Modified:	13 Sep 2021 04:51
URI:	http://repository.its.ac.id/id/eprint/91977

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