Devices using fiber optic sensor are very expensive. Hoping that Indonesia would be independent, Prof. Dr. Moh. Yasin, M.Si. is keen on researching on that complicated field.
ARYA DHITYA/JAWA POS MULTIGUNA: From the left, Yoseph Gita, Mohammad Budiyanto, and Prof. Yasin testing cholesterol level using laser beam.
TWO multi-mode fiber optic cable with the size of 1-2 millimeters were dangling and rolled on the stainless steel table. Laser beam shot can be seen on the end of the cable.
The light that passes through the first cable then illuminates a glass cup containing cholesterol solvent. From the bottom of the clear cup, the laser beam is re-reflected to the top by the round glass at the bottom of the cup. The laser beam reflection is captured by the second optic cable, which is then captured by an optical detector.
The optical detector functions to convert the light reflection into electrical signal. The signal can be identified in the form of electrical voltage using voltmeter, which is connected to the detector.
“This circuit shows how fiber optic sensor can identify the characteristics of an item illuminated by laser,” explained Prof Yasin at the Laboratory of Advanced Optics Experimental Development at the Faculty of Science and Technology, Universitas Airlangga (Unair).
That afternoon, the man born on 12 MArch 1967 was not alone. He was accompanied by two people focusing on similar researches, namely Yoseph Gita, a lecturer at Physics Program of Unair and Mohammad Budiyanto, a lecturer at State University of Surabaya (Unesa) who is taking Mathematics and Science doctorate program at Unair.
From the experiment, the concentration of cholesterol solvent can be discovered by reflecting the light shot by laser. Yes, Yosin’s research focus is unusual. He conducts research in fiber optic sensor. With that focus, Yasin has detected various kind of objects using the reflection of items hit by the laser light.
Then, what is the advantage of the fiber optic sensor application? The man who has conducted researches in fiber optic since 2011 answered confidently. According to him, fiber optic sensor can be used in many aspects of life, such as telecommunication, health, and environment.
In health, for example, many diseases can be detected by the principles of fiber optic sensor, such as those related to cholesterol level in the body. With the help of laser beam, people don’t need to have their blood sample taken in order to check their cholesterol level. Only by being exposed to light, a person’s cholesterol level can be known. Although without any medium, the accuracy of detection is extremely high because its sensitivity reaches part per million (ppm). Moreover, fiber optic sensor is relatively safe, not easy to explode, and does not have a risk to spark fire. The weight of silica fiber in the cable is also light. Therefore, the fiber optic sensor device is easy to carry when needed.
Currently, in the field he is involved in, Yasin has succeeded in detecting several objects, such as the content of honey, protein, mineral, and, the most recently, heartbeat.
Yasin explained that all this time, most devices with fiber optic sensor are still imported. For instance, laser microscope, which can cost Rp5 billion per unit. By being involved in that field, he hopes that Indonesia can create devices using that technology on its own. (elo/c11/nda)
Source: Jawa Pos, Thursday, 21 December 2017, page 23