A high-frequency hydrophone using an optical fiber microknot resonator

Chen, Hao; Shao, Zhihua; Hao, Yongxin; Rong, Qiangzhou

doi:10.1016/j.optcom.2019.04.071

Cited by 21 publications

(10 citation statements)

References 36 publications

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“…Subsequently, Chen et al proposed a compact high-frequency MKR hydrophone with an intrinsic frequency of 3 MHz-6 MHz. [118] Therefore, it should be able to detect sound waves of 1 MHz-2 MHz or lower. At the same time smaller structure and higher sensitivity allow it to be used to detect high frequency sound waves with frequencies in the order of several MHz.…”

Section: Other Sensingmentioning

confidence: 99%

Microfiber Knot Resonators: Structure, Spectral Properties, and Sensing Applications

Zhang,

Gao,

Xia

et al. 2023

Laser & Photonics Reviews

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In recent years, compact micro‐/nanofiber sensors with fast response and high resolution have become a hot field in sensing and nanotechnology. In addition to the unique properties of microfibers such as strong evanescent field, low optical loss, and easy integration, microfiber knot resonators further improve the sensing capability due to their resonance properties. The potential high‐quality factor allows higher sensing sensitivity and resolution, which is very attractive for optical sensing at the micro‐/nano scale. More application potential can be effectively stimulated by improving the structure shape or principle or combining with functional sensitive materials. This paper first introduces the preparation process and spectral characteristics of conventional microfiber knots and then focuses on three new types of devices for enhancing the sensing performance, namely material‐coated, shape‐improved, and principle‐extended, and briefly analyzes their spectral properties. In addition, the research progress and applications of these sensors are summarized. Finally, the existing problems in this field are analyzed, and the directions for further development are discussed and prospected.

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Section: Other Sensingmentioning

confidence: 99%

Microfiber Knot Resonators: Structure, Spectral Properties, and Sensing Applications

Zhang,

Gao,

Xia

et al. 2023

Laser & Photonics Reviews

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“…The resonator focuses the detection beam within a small volume, enhancing the interaction between the beam and the acoustic wave, thus increasing the sensitivity to acoustic fluctuations. The classical optical resonator geometries include Fabry–Pérot interferometers [ 14 , 15 , 16 ], fiber Bragg gratings [ 17 ], and ring resonators [ 18 , 19 , 20 ]. The XARION Laser Acoustics Company [ 21 ] has realized acoustic detection by means of an interferometric cavity formed by two parallel semi-reflective mirrors.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Sensing Performance Investigation Based on Grooves Etched in the Ring Resonators

Yong

Zheng

et al. 2023

Micromachines

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Acoustic detection based on optical technology has moved in the direction of high sensitivity and resolution. In this study, an optical waveguide acoustic sensor based on a ring resonator with the evanescent field is proposed. Grooves are introduced into the ring resonators as a direct sensitive structure to excite the evanescent field. A series of resonators with diverse grooves are fabricated for a comparative analysis of acoustic performance. The acoustic parameters of bandwidth, sensitivity, and signal-to-noise ratio (SNR) vary with different grooves indicated by the Q-factor. The results show that the ring resonators with variable-sized grooves exhibit excellent capability of acoustics detection. A maximum frequency of 160 kHz and a high sensitivity of 60.075 mV/Pa is achieved, with the minimum detectable sound pressure being 131.34 µPa/Hz1/2. Furthermore, the resonators with high Q-factors represent a remarkable sound resolution reaching 0.2 Hz. This work is of great significance for optimizing acoustic sensors and broadening the application range.

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“…Ultrasound detection via fiber optic sensors is a promising field, and a number of different optical fiber sensing schemes have been developed in recent years [10] , [11] , [12] , [13] , [14] , [15] . Among them, fiber optic resonant structures for ultrasound sensors have strong competivity [12] , [16] , [17] , [18] , due to the outstanding performances of high sensitivity and smaller size. In theory, the sensor structures including polymer-membrane based Fabry-Perot interferometers (FPI) [12] , [19] , fiber gratings [15] , [20] and micro-ring resonators [17] have extremely high sensitivity with a very small footprint owing to the long interaction length.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, fiber optic resonant structures for ultrasound sensors have strong competivity [12] , [16] , [17] , [18] , due to the outstanding performances of high sensitivity and smaller size. In theory, the sensor structures including polymer-membrane based Fabry-Perot interferometers (FPI) [12] , [19] , fiber gratings [15] , [20] and micro-ring resonators [17] have extremely high sensitivity with a very small footprint owing to the long interaction length. The spectral sideband filter technique is commonly used to achieve signal demodulation for ultrasound detection [21] , [22] , [23] .…”

Section: Introductionmentioning

confidence: 99%

Miniaturized fiber optic ultrasound sensor with multiplexing for photoacoustic imaging

Yang

Chen

et al. 2022

Photoacoustics

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A high-frequency hydrophone using an optical fiber microknot resonator

Cited by 21 publications

References 36 publications

Microfiber Knot Resonators: Structure, Spectral Properties, and Sensing Applications

Microfiber Knot Resonators: Structure, Spectral Properties, and Sensing Applications

Acoustic Sensing Performance Investigation Based on Grooves Etched in the Ring Resonators

Miniaturized fiber optic ultrasound sensor with multiplexing for photoacoustic imaging

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