Graphene membrane fiber Fabry-Perot resonator and excitation/vibration pickup detection method thereof

Abstract

The invention discloses a graphene membrane fiber Fabry-Perot resonator and an excitation / vibration pickup detection method thereof. The resonator is manufactured based on a graphene membrane and the principle of fiber Fabry-Perot interference optics. The graphene membrane is used as resonant material, and membrane excitation and vibration pickup can be realized by using fiber conduction laser. According to the excitation method, the graphene membrane is periodically irradiated by light intensity modulated laser, the graphene membrane absorbs light energy and converts the light energy into mechanical energy to generate forced vibration so that excitation of the graphene membrane resonator can be realized. According to the vibration pickup method, the acquired interference signals are demodulated based on the principle of Fabry-Perot interference, and the frequency change information of the interference light signals is acquired so that measured detection related to the frequency quantity can be realized. The resonator has the advantages of easy manufacturing, high sensitivity, small size, low power consumption, quasi-digital signal output, online measurement and electromagnetic interference resistance so that the resonator can perform detection of pressure, temperature, humidity and other physical quantities and gas quantities, biomass and other parameters and can be applied to the field of aerospace, biomedicine and industrial control.

Description

technical field [0001] The invention relates to the technical field of optical fiber interference resonators and optical fiber sensing, in particular to a graphene film optical fiber F-P resonator and an optical fiber interference excitation / vibration pickup detection method. Background technique [0002] In addition to the advantages of ordinary micro-sensors, resonant micro-mechanical sensors also have the advantages of quasi-digital signal output, strong anti-interference ability, high resolution and high measurement accuracy. Therefore, resonant microstructure sensors with stable and reliable performance, high precision, and direct output frequency are the focus of micromechanical sensor research. In recent years, research on resonant micromechanical pressure sensors at home and abroad has mostly focused on silicon membranes. Since the discovery of graphene by K.S. Novoselov et al. at the University of Manchester, UK in 2004, research on the mechanical, optical, electric...

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Problems solved by technology

The resonator is composed of graphene film, single-mode optical fiber, fiber ferrule, ferrule matching sleeve, etc., which can solve the difficulty and high cost of graphene film MEMS / NEMS resonator in the existing method. The interference excitation / pickup detection method has the advantages of high reliability, on-line measurement, and anti-electromagnetic interference, and can solve the practical problems of existing space optics-based excitation / pickup detection such as complex test devices and unfavorable on-site online measurement. sexual problems

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