• S. SRINIVASULU
• Dr. S. VENKATESWARA RAO

In the present paper an intensity modulated extrinsic fiber optic evanescent wave sensor for the detection of content of sugar present in the solution of sugar mixed in Distil Water is presented. In the experimental setup two PCS fibers of 200/230µm dia, a Bench mark optical power meter, a light source operating at 630nm and a U-shaped glass rod of 0.5mm dia have been used. The U-shaped glass rod as an extrinsic sensing element was connected between light source and the power meter using two PCS fibers of 50cm length each. Fixing the height of immersion of U-shaped glass rod as 1cm, the power launched from the source and the power reaching the output detector was noted. With this immersion height the power was noted for various concentration of the sugar mixed in water. At the same time the refractive indices of the solutions with different concentration of sugar were determined by using Digital Refractometer (RX 7000i) operated at 5893Å. As the refractive index of the solution increases the output power decreases. This was repeated for various heights of immersion (2cm, 3cm) in the sugar solution. This sensor can be used in sugar industry and also in the civilian and consumer applications for the ready detection of the concentration of the sugar in various solutions.

Bench mark Optical power meter, Content of sugar, Digital Refractometer (RX 7000i), Immersion height, PCS fiber.

"INVESTIGATION OF U-SHAPED GLASS ROD BASED INTENSITY MODULATED EXTRINSIC FIBER OPTIC SENSOR TO DETERMINE THE CONCENTRATION OF SUGAR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 9, page no.220-224, September-2018, Available :http://www.jetir.org/papers/JETIRA006356.pdf

"INVESTIGATION OF U-SHAPED GLASS ROD BASED INTENSITY MODULATED EXTRINSIC FIBER OPTIC SENSOR TO DETERMINE THE CONCENTRATION OF SUGAR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 9, page no. pp220-224, September-2018, Available at : http://www.jetir.org/papers/JETIRA006356.pdf