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Highly sensitive fiber optics evanescent wave sensor for detection of zinc in water

V. K. KULKARNI1, M. S. JADHAV2, S. B. PATIL3, S. R. MANNOPANTAR4, H. H. BENDIGERI5, D. S. LALASANGI6, U. S. RAIKAR7, A. S. LALASANGI8,*

Affiliation

  1. Department of Physics, Angadi Institute of Technology & Management, Belagavi, (Karnataka), India
  2. Department of Physics, J. S. S. Arts, Science and Commerce College, Gokak (Karnataka), India
  3. Department of Physics, Government First Grade College, Ranebennur (Karnataka), India
  4. Department of Physics, Government First Grade College, Harihar (Karnataka), India
  5. Department of Physics, Gogte Institute of Technology, Belagavi (Karnataka), India
  6. Department of Physics, Government First Grade College, Dharwad (Karnataka), India
  7. Department of Physics, Karnatak University, Dharwad (Karnataka), India
  8. Department of Physics, Smt. I. S. Yadawad Government First Grade College, Ramdurg (Karnataka), India

Abstract

Optical fiber chemical sensors provide a promising solution for determination of contaminants elements like Zinc, present in drinking water in ppm level & are a big challenge in present scenario. In the present work, designed a multimode evanescent wave fiber optic chemical sensors have been reported for zinc detection. The whole experiment has been performed by fixing the fibers in a horizontal position with the sensor regions at the center of the fiber, making it less prone to disturbance and breaking. This experimental study explores the detection of zinc in water using multimode optical fiber and sensitivity shows that 0.0042 mW change in power per ppm for core mode and 0.228 mW changes in power per ppm for cladding mode. Variation in the refractive index of different concentration of sample (at ppm) leads to change in output power. The highly sensitive fiber optic evanescent wave sensors provide low-cost and most effective device for chemical species detection and widely used in various medical, biological and chemical applications..

Keywords

Chemical sensor, Evanescent wave, Multimode fiber, Zinc.

Submitted at: Jan. 12, 2021
Accepted at: Aug. 10, 2022

Citation

V. K. KULKARNI, M. S. JADHAV, S. B. PATIL, S. R. MANNOPANTAR, H. H. BENDIGERI, D. S. LALASANGI, U. S. RAIKAR, A. S. LALASANGI, Highly sensitive fiber optics evanescent wave sensor for detection of zinc in water, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 7-8, pp. 318-322 (2022)