Interference characteristics in a Fabry–Perot cavity with graphene membrane for optical fiber pressure sensors

Li, Cheng; Xiao, Jun; Guo, Tingting; Fan, Shangchun; Jin, Wei

doi:10.1007/s00542-014-2333-2

Cited by 35 publications

(31 citation statements)

References 19 publications

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“…R 2 is measured to be 2.5%, and I i is the incident intensity. ξ is the coupling coefficient of cavity length loss [23]. When ignoring the half-wave loss, the phase difference θ between two adjacent beams in micro-air cavity can be written as

θ = 4 π L / λ,

where L is the length of F-P cavity, and λ is the wavelength of incident light.…”

Section: Fabry-perot (F-p) Resonator Fabrication and Optical Actuamentioning

confidence: 99%

“…When a diaphragm-type F-P interferometer made of low-reflectivity mirrors is illuminated by a monochromatic light source, the response is a periodic function similar to a two-beam interferometer. Based on the thin-film optical theory and the Fresnel’s equations for reflection and refraction [23], the reflectivity of MoS 2 film is measured to be ~0.89%. Thus, due to the lower reflectivities of the two F-P mirrors, Equation (1) can be simplified as

I_{r} = (R_{2} + ξ R_{1} + 2 \sqrt{ξ R_{1} R_{2}} \cos θ) I_{i},

…”

Section: Fabry-perot (F-p) Resonator Fabrication and Optical Actuamentioning

confidence: 99%

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The Effect of Viscous Air Damping on an Optically Actuated Multilayer MoS2 Nanomechanical Resonator Using Fabry-Perot Interference

She

Lan

et al. 2016

Nanomaterials

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We demonstrated a multilayer molybdenum disulfide (MoS2) nanomechanical resonator by using optical Fabry-Perot (F-P) interferometric excitation and detection. The thin circular MoS2 nanomembrane with an approximate 8-nm thickness was transferred onto the endface of a ferrule with an inner diameter of 125 μm, which created a low finesse F-P interferometer with a cavity length of 39.92 μm. The effects of temperature and viscous air damping on resonance behavior of the resonator were investigated in the range of −10–80 °C. Along with the optomechanical behavior of the resonator in air, the measured resonance frequencies ranged from 36 kHz to 73 kHz with an extremely low inflection point at 20 °C, which conformed reasonably to those solved by previously obtained thermal expansion coefficients of MoS2. Further, a maximum quality (Q) factor of 1.35 for the resonator was observed at 0 °C due to viscous dissipation, in relation to the lower Knudsen number of 0.0025~0.0034 in the tested temperature range. Moreover, measurements of Q factor revealed little dependence of Q on resonance frequency and temperature. These measurements shed light on the mechanisms behind viscous air damping in MoS2, graphene, and other 2D resonators.

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θ = 4 π L / λ,

where L is the length of F-P cavity, and λ is the wavelength of incident light.…”

Section: Fabry-perot (F-p) Resonator Fabrication and Optical Actuamentioning

confidence: 99%

I_{r} = (R_{2} + ξ R_{1} + 2 \sqrt{ξ R_{1} R_{2}} \cos θ) I_{i},

…”

Section: Fabry-perot (F-p) Resonator Fabrication and Optical Actuamentioning

confidence: 99%

The Effect of Viscous Air Damping on an Optically Actuated Multilayer MoS2 Nanomechanical Resonator Using Fabry-Perot Interference

She

Lan

et al. 2016

Nanomaterials

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“…These systems are based on a diaphragm, made with a glass fiber [3], flexible organic materials [4], metallic layer [5], graphene [6] or UV-mold [7]. FPI sensors are also established as sophisticated thermal sensors [8][9], thanks to their capability to operate at high temperature maintaining a linear calibration.…”

Section: Introductionmentioning

confidence: 99%

“…EFPI sensors are consistently finding application in pressure sensing [3][4][5][6][7]. These systems are based on a diaphragm, made with a glass fiber [3], flexible organic materials [4], metallic layer [5], graphene [6] or UV-mold [7].…”

Section: Introductionmentioning

confidence: 99%

“…FPI sensor are also well established in oil and gas applications [1,8], whereas the capability to sustain very high temperature and pressure levels is a key asset. Thanks to the micromachining and advanced etching capacities available in research centers, and the possibility to enclose FPI cavity in graphene layers [6,8], FPI sensors are becoming increasingly attractive for optofluidics [12] and biological sensing.…”

Section: Introductionmentioning

confidence: 99%

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Simultaneous Detection of Multiple Fiber-Optic Fabry–Perot Interferometry Sensors With Cepstrum-Division Multiplexing

Tosi

2016

J. Lightwave Technol.

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Increasing the capacity of an array of sensors is a major challenge in fiber-optic sensing networks. Whereas fiber Bragg grating (FBG) sensors can be discriminated in the spectrum domain, through the popular wavelength-divisionmultiplexing (WDM) approach, Fabry-Perot Interferometry (FPI) sensors have a broad spectrum and are not suitable for WDM. In this paper, a novel approach for the simultaneous detection of multiple FPI sensors is proposed. The key is decoding sensors in the optical cepstrum (spectrum of the optical spectrum) domain, using a Capon estimator. Subsequently, the small cepstrum shifts are accurately detected with a fast-phase correlation (FPC) method. This approach is labeled cepstrumdivision-multiplexing (CDM). CDM has been tested on a simulated FPI array, with a coarse wavelength grid typical of most FBG interrogators. Unambiguous and simultaneous detection of 20-39 sensors is achieved, improving over previous methods limited to 1-3 sensors; 0.04 nm accuracy on cavity length estimation has been achieved. A preliminary experimental demonstration has been set up to validate the CDM approach.Index Terms-Fabry-Perot Interferometry (FPI), fiber optic sensors (FOS), Extrinsic Fabry-Perot Interferometry (EFPI), sensor detection, optical fiber sensor networks, Capon estimator.

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A Review on the Applications of Graphene in Mechanical Transduction

et al. 2021

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A pressing need to develop low‐cost, environmentally friendly, and sensitive sensors has arisen with the advent of the always‐connected paradigm of the internet‐of‐things (IoT). In particular, mechanical sensors have been widely studied in recent years for applications ranging from health monitoring, through mechanical biosignals, to structure integrity analysis. On the other hand, innovative ways to implement mechanical actuation have also been the focus of intense research in an attempt to close the circle of human–machine interaction, and move toward applications in flexible electronics. Due to its potential scalability, disposability, and outstanding properties, graphene has been thoroughly studied in the field of mechanical transduction. The applications of graphene in mechanical transduction are reviewed here. An overview of sensor and actuator applications is provided, covering different transduction mechanisms such as piezoresistivity, capacitive sensing, optically interrogated displacement, piezoelectricity, triboelectricity, electrostatic actuation, chemomechanical and thermomechanical actuation, as well as thermoacoustic emission. A critical review of the main approaches is presented within the scope of a wider discussion on the future of this so‐called wonder material in the field of mechanical transduction.

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Interference characteristics in a Fabry–Perot cavity with graphene membrane for optical fiber pressure sensors

Cited by 35 publications

References 19 publications

The Effect of Viscous Air Damping on an Optically Actuated Multilayer MoS2 Nanomechanical Resonator Using Fabry-Perot Interference

The Effect of Viscous Air Damping on an Optically Actuated Multilayer MoS2 Nanomechanical Resonator Using Fabry-Perot Interference

Simultaneous Detection of Multiple Fiber-Optic Fabry–Perot Interferometry Sensors With Cepstrum-Division Multiplexing

A Review on the Applications of Graphene in Mechanical Transduction

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