fa Sensitivity investigation of optical fiber sensors based on Fabry–Pérot interferometry using MoS2 and GO membrane for detection of acoustic waves تخصصی Special پژوهشي Research <strong><span style="font-family:Calibri,sans-serif;"><span style="font-size:11.0pt;">In this paper, an optical fiber sensor (OFS) based on extrinsic Fabry&ndash;P&eacute;rot (F-P) interferometry (EFPI) is reported for acoustic waves detection. The sensor diaphragm is made of disulfide molybdenum (MoS₂) and graphene oxide (GO) nanosheets. These diaphragms are placed in the end face of single-mode fiber (SMF) optics. Due to the lower Young&rsquo;s modulus of the MoS₂ rather than GO, the fabricated sensor benefits high sensitivity to detect acoustic waves. The results show that the sensitivity of the MoS₂-based sensor, ~18.50 rad/Pa, is more than the GO-based sensor (~15.52 rad/Pa).</span></span></strong> <strong>In this paper, an optical fiber sensor (OFS) based on extrinsic Fabry&ndash;P&eacute;rot (F-P) interferometry (EFPI) is reported for acoustic waves detection. The sensor diaphragm is made of disulfide molybdenum (MoS₂) and graphene oxide (GO) nanosheets. These diaphragms are placed in the end face of single-mode fiber (SMF) optics. Due to the lower Young&rsquo;s modulus of the MoS₂ rather than GO, the fabricated sensor benefits high sensitivity to detect acoustic waves. The results show that the sensitivity of the MoS₂-based sensor, ~18.50 rad/Pa, is more than the GO-based sensor (~15.52 rad/Pa).</strong> Optical fiber acoustic sensor, Fabry–Pérot interferometry, MoS2, Graphene oxide Optical fiber acoustic sensor, Fabry–Pérot interferometry, MoS2, Graphene oxide 28 30 http://opsi.ir/browse.php?a_code=A-10-1972-11&slc_lang=fa&sid=1 Ali Ojaghloo Ali Ojaghloo 10031947532846009983 10031947532846009983 No Department of Physics and Energy Engineering, Amirkabir University of Technology, Tehran, Iran Department of Physics and Energy Engineering, Amirkabir University of Technology, Tehran, Iran Parviz Parvin Parviz Parvin 10031947532846009984 10031947532846009984 Yes Department of Physics and Energy Engineering, Amirkabir University of Technology, Tehran, Iran Department of Physics and Energy Engineering, Amirkabir University of Technology, Tehran, Iran Hamed Moradi Hamed Moradi 10031947532846009985 10031947532846009985 No Department of Physics and Energy Engineering, Amirkabir University of Technology, Tehran, Iran Department of Physics and Energy Engineering, Amirkabir University of Technology, Tehran, Iran Fatemeh Shahi Fatemeh Shahi 10031947532846009986 10031947532846009986 No Department of Physics and Energy Engineering, Amirkabir University of Technology, Tehran, Iran Department of Physics and Energy Engineering, Amirkabir University of Technology, Tehran, Iran