Open AccessAnalyzing the temperature sensitivity of Fabry-Perot sensor using multilayer graphene diaphragm
Author(s) -
Cheng Li,
Qianwen Liu,
Xiaobin Peng,
Shangchun Fan
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.027494
Subject(s) - materials science , fabry–pérot interferometer , finesse , optics , graphene , interferometry , diaphragm (acoustics) , resonator , deflection (physics) , refractive index , thermal expansion , optoelectronics , composite material , nanotechnology , wavelength , vibration , physics , quantum mechanics
A miniature Fabry-Perot interferometric sensor with an ultra-high temperature sensitivity was constructed by using an approximate 8-layer graphene diaphragm. The extremely thin diaphragm was transferred onto the endface of a ferrule with an inner diameter of 125 μm, and van der Waals interactions between the graphene diaphragm and its substrate created a low finesse Fabry-Perot interferometer with a cavity length of 42.86 μm. Temperature testing demonstrated a temperature-induced cavity length change of 352 nm/°C with a good linearity in the range of 20-60 °C. The result conformed well to the proposed analytical models relating to thermal expansion of trapped gas, thermal-optical property of graphene diaphragm and deflection behavior of bulged graphene blister. However, the ultra-thin diaphragm exhibited a small deflection deformation characteristic due to the applied higher loads.