• Gadila Bhavana
• Dr. G. Devendhar rao

Opto electronic and fiber optic communication technologies have been integrated into advancements in optical fiber sensing technology. In this study, a novel sensing method has been developed, employing a U-shaped glass rod of specific dimensions as the core element of the sensor. The U-shaped glass rod, positioned between an input fiber connected to a light source and an output fiber linked to a power meter, serves as an extrinsic sensing element to detect transparent liquids based on their refractive index. Light emitted from a semiconductor laser source is transmitted through the input fiber with minimal loss. Upon reaching the U-shaped glass rod, the light is coupled into the first end of the rod, where it experiences significant attenuation due to the bend and absorption by the liquid surrounding the rod as it propagates. The remaining light is transmitted into the output fiber and directed towards the optical power detector. The different proportions of liquids,they are used as cladding for the U-shaped glass rod, so that refractive index of each proportion is measured at different proportions by Abbe’s refractometer and the obtained values are noted

U-shaped glass rod, chemicals, refractive index, optical fiber, sensor.

"CINNAMON OIL AND ETHANOL BINARY LIQUID ENABLED CALIBRATION-DESIGN AND DEVELOPMENT OF FIBER OPTIC U-SHAPED GLASS PROBE EXTRINSIC REFRACTIVE INDEX SENSOR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 11, page no.b76-b82, November-2024, Available :http://www.jetir.org/papers/JETIR2411108.pdf

"CINNAMON OIL AND ETHANOL BINARY LIQUID ENABLED CALIBRATION-DESIGN AND DEVELOPMENT OF FIBER OPTIC U-SHAPED GLASS PROBE EXTRINSIC REFRACTIVE INDEX SENSOR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 11, page no. ppb76-b82, November-2024, Available at : http://www.jetir.org/papers/JETIR2411108.pdf