Fiber optic chemical sensors for water testing by using fiber loop ringdown spectroscopy technique

Kaya M.

TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES, cilt.28, sa.5, ss.2375-2384, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 28 Sayı: 5
  • Basım Tarihi: 2020
  • Doi Numarası: 10.3906/elk-2005-39
  • Dergi Adı: TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Applied Science & Technology Source, Compendex, Computer & Applied Sciences, INSPEC, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.2375-2384
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

Real-time response, low cost, sensitive and easy setup fiber optic chemical sensors were fabricated by etching a part of single mode fiber in hydrofluoric (HF) acid solution and tested in different water samples such as tap water, DI water, salty and sugar water with different concentrations to record ringdown time (RDT) differences between media due to refractive index differences by employing the fiber loop ringdown (FLRD) spectroscopy technique. Baseline stability of 0.63% and the minimum detectable RDT of 5.05 mu s for this kind of fiber optic chemical sensors were obtained. Fabricated sensors were coated with N,N-Diethyl-p-phenylenediamine for the first time and tested in several water solutions. Afterwards, the sensors were immersed into salty and sugar water solutions in different concentrations. The results showed that this kind of FLRDS fiber optic chemical sensors can be applicable to trace chemicals in water solutions. Moreover, fiber optic sensors can be specially modified to trace specifically any target chemicals in solutions for the special purpose and the early detection.