Graphene-Based Fabry-Perot Acoustic Sensor Aided by Miniature Sound Amplification Structure

Li, Cheng; Dong, Shuxuan; Xiao, Xi; Liu, Yang; Song, Xiaomu; Fan, Shangchun

doi:10.1109/lpt.2022.3207331

Cited by 4 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The acoustic signal is modulated to changes in phase or intensity of the optical signal for acoustic sensing. Among them, fiber-optic FPI-based acoustic sensor stands out as a preferred choice due to its advantages of compact size, high-sensitivity and reflection-mode operation [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity EFPI-Based Acoustic Sensor Using in-Fiber Collimator and Adjustable 45° Mirror

Zhang,

Luo,

Zhang

et al. 2024

IEEE Photonics J.

View full text Add to dashboard Cite

In this paper, a high-sensitivity cross-axial extrinsic Fabry-Perot interferometric (EFPI) acoustic sensor is proposed and experimentally demonstrated. The cross-axial EFPI is constructed by optical fiber and cantilever's inner surface, assisted with an adjustable 45° mirror. Herein, the 45° mirror is utilized to achieve beam total reflection and flexibly adjust the parallelism of the two reflectors. A quarter-pitch graded index fiber (GIF) is introduced as an in-fiber collimator to reduce beam propagation loss and thus enhance coupling efficiency. Experimental results show that the proposed sensor achieves a high fringe visibility of up to 41 dB, greatly enhancing acoustic sensing performance. Furthermore, the sensitivity and the minimum detectable pressure (MDP) measured at resonance frequency (@2.05 kHz) are significantly improved to be 70.67 mV/Pa that is corresponding to mechanical sensitivity of ~2490 nm/Pa, and 13.4 μPa/Hz 1/2 , respectively. The proposed sensor demonstrates the potential for low-frequency vibration monitoring with the advantages of easy fabrication, highsensitivity and flexible manipulability.

show abstract

Section: Introductionmentioning

confidence: 99%

High-Sensitivity EFPI-Based Acoustic Sensor Using in-Fiber Collimator and Adjustable 45° Mirror

Zhang,

Luo,

Zhang

et al. 2024

IEEE Photonics J.

View full text Add to dashboard Cite

show abstract

“…al. details the development and testing of a miniature high-gain acoustic sensor assembly featuring a multilayer graphene diaphragm within a high-sensitivity Fabry-Perot (FP) acoustic sensor framework [16]. Results demonstrate significantly elevated acoustic sensitivity, making it suitable for long-distance, weak sound detection applications.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Infused Terracotta Acoustic Sound Amplifiers

TR,

Pavithran,

Das

et al. 2024

Preprint

View full text Add to dashboard Cite

This work introduces a novel approach for enhancing mobile audio performance by incorporating graphene-infused terracotta as an acoustic amplifier. Leveraging the high thermal conductivity and mechanical strength of graphene, this study demonstrates the design, fabrication, and acoustic characterization of terracotta amplifiers. We demonstrate the significant impact of graphene-infused terracotta amplifiers on improving sound amplification in addition to mechanical strength. A graphene-based dispersion is prepared for incorporation in clay to make the amplifier. Testing is carried out on normal and graphene-dispersion-incorporated terracotta amplifiers. The experimental results illustrate a substantial improvement in audio quality with increased volume compared to conventional terracotta-based mobile speakers. The frequency-dependent variation of the output signal, SNR, and the influence of submerging in water have also been studied. This work contributes to the field of acoustic materials and offers new possibilities for augmenting the auditory experience of mobile device users while also presenting sustainable and aesthetically appealing acoustic accessories.

show abstract

Fabrication of Acoustic Sensor Using Multilayer Transferred Monocrystal Graphene and Graphene–Polymethyl Methacrylate Composite Film Based on Extrinsic Fabry–Pérot Interference Effect

Guo,

Yao,

Zhang

et al. 2024

IEEE Sensors J.

View full text Add to dashboard Cite

Graphene-Based Fabry-Perot Acoustic Sensor Aided by Miniature Sound Amplification Structure

Cited by 4 publications

References 12 publications

High-Sensitivity EFPI-Based Acoustic Sensor Using in-Fiber Collimator and Adjustable 45° Mirror

High-Sensitivity EFPI-Based Acoustic Sensor Using in-Fiber Collimator and Adjustable 45° Mirror

Graphene-Infused Terracotta Acoustic Sound Amplifiers

Fabrication of Acoustic Sensor Using Multilayer Transferred Monocrystal Graphene and Graphene–Polymethyl Methacrylate Composite Film Based on Extrinsic Fabry–Pérot Interference Effect

Contact Info

Product

Resources

About