S-shaped microfiber based diaphragm supported optical microphone

Dass, Sumit; Kachhap, Santosh; Jha, Rajan

doi:10.1088/2515-7647/ab1a6c

Cited by 11 publications

(5 citation statements)

References 33 publications

(35 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on S-shaped tapered fibre (STF), as shown in Figure 7 a, a straightforward and incredibly sensitive optical microphone was presented [ 122 ]. A thin, round nitrile diaphragm is connected in the middle to the short, pigtailed end of the STF.…”

Section: Most Widely Employed Optical Fibre Configurations In Sensing...mentioning

confidence: 99%

“…The suggested sensor achieves a sensitivity of 3.07 mV/Pa and a minimum detectable pressure of 36.48 mPa/Hz for an optimized setup. Up to 1300 Hz, the sensor exhibits linear behaviour, and its experimental first-order natural frequency is 1455 Hz [ 122 ].…”

Section: Most Widely Employed Optical Fibre Configurations In Sensing...mentioning

confidence: 99%

“… ( a ) Micrograph of STF [ 122 ], ( b ) schematic diagram of the proposed dislocation fibre MZI-based sensor measurement system [ 123 ], ( c ) schematic diagram of the dislocation fibre MZI-based sensor [ 123 ], and ( d ) microscope image of the point of dislocation fibre (6 μm) [ 123 ]. …”

Section: Figurementioning

confidence: 99%

See 2 more Smart Citations

Optical Fibre-Based Sensors—An Assessment of Current Innovations

Khonina,

Kazanskiy,

Butt

2023

Biosensors

View full text Add to dashboard Cite

Optical fibre sensors are an essential subset of optical fibre technology, designed specifically for sensing and measuring several physical parameters. These sensors offer unique advantages over traditional sensors, making them gradually more valuable in a wide range of applications. They can detect extremely small variations in the physical parameters they are designed to measure, such as analytes in the case of biosensing. This high sensitivity allows them to detect subtle variations in temperature, pressure, strain, the refractive index of analytes, vibration, and other environmental factors with exceptional accuracy. Moreover, these sensors enable remote sensing capabilities. Since light signals are used to carry information, the sensing elements can be placed at distant or inaccessible sites and still communicate the data back to the central monitoring system without signal degradation. In recent times, different attractive configurations and approaches have been proposed to enhance the sensitivity of the optical fibre-based sensor and are briefly explained in this review. However, we believe that the choice of optical fibre sensor configuration should be designated based on the specific application. As these sensors continue to evolve and improve, they will play an increasingly vital role in critical monitoring and control applications across various industries.

show abstract

Section: Most Widely Employed Optical Fibre Configurations In Sensing...mentioning

confidence: 99%

Section: Most Widely Employed Optical Fibre Configurations In Sensing...mentioning

confidence: 99%

See 1 more Smart Citation

Optical Fibre-Based Sensors—An Assessment of Current Innovations

Khonina,

Kazanskiy,

Butt

2023

Biosensors

View full text Add to dashboard Cite

show abstract

“…Up to date, most of membrane-based fiber optic acoustic sensor schemes usually focus on the optical fiber structure [17][18][19][20] or the material and size of membrane [18,[21][22][23]; meanwhile, the stress exerted on the membrane is neglected, which is also a crucial parameter affecting the response characteristics of sensors [24,25]. Since accurately controlling membrane stress is challenging during the fabrication process of membrane-based acoustic sensors, a few investigations and experiments have revealed the influence law of stress on the response mechanism of fiber optic acoustic sensors [24,26,27], which results in unstable and inconsistent response characteristics between different acoustic sensors.…”

Section: Introductionmentioning

confidence: 99%

Investigation of membrane stress continuously adjustable fiber optic acoustic sensor based on inverse piezoelectric effect

Luo,

Ding,

Sun

2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

In this paper, a membrane stress continuously adjustable fiber optic acoustic sensor technology is proposed, in which the stress exerted on membrane can be flexibly adjusted by employing inverse piezoelectric effect of Lead zirconate titanate (PZT) tubular pedestal. Firstly, the response mechanism of stress on membrane is investigated theoretically. On this basis, the effect of adjustable stress on the flat response region and sensitivity of single mode-multimode-single mode (SMS) fiber optic acoustic sensor are studied experimentally. The experimental result reveals that the flat response region of sensor extends from 250 Hz to 450 Hz following with the continuous increase of membrane stress by changing the positive Direct Current (DC) voltage applied on PZT from 0 V to 100 V, meanwhile the sensitivity decreases gradually from 336.5 mV/Pa to 162.7 mV/Pa. The result also verifies that the average minimum detectable pressure (MDP) of sensor maintains at 0.54 mPa/Hz1/2 with a fluctuation of 0.08 mPa/Hz1/2 during the tuning process of membrane stress, which provides a flexible method for performance and applicability improvement of membrane-based fiber optic acoustic sensors.

show abstract

“…In the same year, a simple and highly sensitive optical microphone based on S-shaped tapered fiber is proposed and demonstrated. The proposed sensor achieves a sensitivity of 3.07 mV Pa −1 and a minimum detectable pressure (MDP) of 36.48 mPa Hz −1 [18]. In 2021, a compact cantilever-based voice-eavesdropping microresonator is proposed [19].…”

Section: Introductionmentioning

confidence: 99%

Research on acoustic sensing device based on microfiber knot resonator

Zhao¹,

Cui²,

Yu³

et al. 2022

J. Micromech. Microeng.

View full text Add to dashboard Cite

An acoustic sensor packaged with polydimethylsiloxane (PDMS) film sandwich structure is proposed in this paper. The sensor uses a flat glass with a square hole in the middle as the substrate structure. The cavity length of the microfiber knot resonator (MKR) is significantly changed by the applied acoustic pressure, which is ultimately manifested as a change in the strength of the sensor signal. The sensor has a good response at frequencies from 0.1 to 10 kHz , and has a sensitivity of 0.92 mV/Pa at 1 kHz acoustic frequency. The sensor studied in this paper has the advantages of wide frequency band, small size and low cost, and has a good application prospect in the field of acoustic signal detection.

show abstract

S-shaped microfiber based diaphragm supported optical microphone

Cited by 11 publications

References 33 publications

Optical Fibre-Based Sensors—An Assessment of Current Innovations

Optical Fibre-Based Sensors—An Assessment of Current Innovations

Investigation of membrane stress continuously adjustable fiber optic acoustic sensor based on inverse piezoelectric effect

Research on acoustic sensing device based on microfiber knot resonator

Contact Info

Product

Resources

About