Tapered No-Core Fibre incorporated with Molybdenum Disulfide-based Refractive Index Sensor

Abstract This paper presents the design, fabrication, and sensitivity evaluation of refractive index measurement based on no-core fibre (NCF) based sensor. The NCF sensor undergoes several fabrication processes to enhance sensitivity, including carbon dioxide (CO 2 ) tapering and molybdenum disulfide (MoS 2 ) coating. This integration will enable the sensor to exhibit superior sensing responses. Experimental results demonstrated that the coated MoS 2 tapered no-core fibre (TNCF) based refractive index sensor exhibited a significantly higher sensitivity of 113.52992 ± 7.13889 nm/RIU, compared to the sensitivity of coated NCF and bare NCF, which are at 79.73184 ± 5.85083 nm/RIU and 64.9418 ± 4.56332 nm/RIU, respectively. This shows that the TNCF coated with MoS 2 exhibited a higher sensitivity make it a potential candidate for various real-time applications. Professionals in industries related to chemical sensing, environmental monitoring, and industrial process control may benefit from the development of reliable and reusable sensor probes.