Tapered optical fiber geometries and sensing applications based on Mach-Zehnder Interferometer: A review

Bhardwaj, Vanita; Kishor, Kamal; Sharma, Avinash

doi:10.1016/j.yofte.2020.102302

Cited by 40 publications

(16 citation statements)

References 67 publications

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“…Concluded from Equation (2), when the propagation constants are changed, the phase condition of the constructive (or destructive) interference is altered and N is changed. Thereby, wavelength of the constructive (or destructive) interference shifts which correspond to the surrounding RI value [ 47 ].…”

Section: Methodsmentioning

confidence: 99%

A Taper-in-Taper Structured Interferometric Optical Fiber Sensor for Cu2+ ion Detection

Gong

Lei

Wang

et al. 2022

Sensors

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Copper ion is closely associated with the ecosystem and human health, and even a little excessive dose in drinking water may result in a range of health problems. However, it remains challenging to produce a highly sensitive, reliable, cost-effective and electromagnetic-interference interference-immune device to detect Cu2+ ion in drinking water. In this paper, a taper-in-taper fiber sensor was fabricated with high sensitivity by mode-mode interference and deposited polyelectrolyte layers for Cu2+ detection. We propose a new structure which forms a secondary taper in the middle of the single-mode fiber through two-arc discharge. Experimental results show that the newly developed fiber sensor possesses a sensitivity of 2741 nm/RIU in refractive index (RI), exhibits 3.7 times sensitivity enhancement when compared with traditional tapered fiber sensors. To apply this sensor in copper ions detection, the results present that when the concentration of Cu2+ is 0–0.1 mM, the sensitivity could reach 78.03 nm/mM. The taper-in-taper fiber sensor exhibits high sensitivity with good stability and mechanical strength which has great potential to be applied in the detection of low Cu2+ ions in some specific environments such as drinking water.

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Section: Methodsmentioning

confidence: 99%

A Taper-in-Taper Structured Interferometric Optical Fiber Sensor for Cu2+ ion Detection

Gong

Lei

Wang

et al. 2022

Sensors

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“…Reducing the fiber diameter is an effective way to enhance the sensitivity of the hydrogen sensor [187]. Although, the nanofiber is capable of enhancing the sensitivity, however, the excessive reduction of the diameter may lead to decreases in the mechanical stability of such devices [188]. The LPFG based sensor with a higher EF at the cladding may be more promising than FBG based hydrogen sensors.…”

Section: Future Prospectivementioning

confidence: 99%

Recent Advances in Optical Hydrogen Sensor including Use of Metal and Metal Alloys: A Review

et al. 2023

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Optical sensing technologies for hydrogen monitoring are of increasing importance in connection with the development and expanded use of hydrogen and for transition to the hydrogen economy. The past decades have witnessed a rapid development of optical sensors for hydrogen monitoring due to their excellent features of being immune to electromagnetic interference, highly sensitive, and widely applicable to a broad range of applications including gas sensing at the sub-ppm range. However, the selection of hydrogen selective metal and metal alloy plays an important role. Considering the major advancements in the field of optical sensing technologies, this review aims to provide an overview of the recent progress in hydrogen monitoring. Additionally, this review highlights the sensing principles, advantages, limitations, and future development.

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“…The phase shift occurs due to a change in sensing arm length following mechanical or thermal strain. This type of interferometer is mostly used to test telecommunication industry networks, for underwater sensing as a hydrophone [ 59 ], for sensing temperature and refractive index [ 60 ], in the healthcare industry for optoacoustic imaging applications [ 61 ], and as a heart rate and respiratory rate sensor [ 62 ].…”

Section: Optical Fiber Sensorsmentioning

confidence: 99%

Optical Fiber Sensors and Sensing Networks: Overview of the Main Principles and Applications

Pendão

Silva

2022

Sensors

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Optical fiber sensors present several advantages in relation to other types of sensors. These advantages are essentially related to the optical fiber properties, i.e., small, lightweight, resistant to high temperatures and pressure, electromagnetically passive, among others. Sensing is achieved by exploring the properties of light to obtain measurements of parameters, such as temperature, strain, or angular velocity. In addition, optical fiber sensors can be used to form an Optical Fiber Sensing Network (OFSN) allowing manufacturers to create versatile monitoring solutions with several applications, e.g., periodic monitoring along extensive distances (kilometers), in extreme or hazardous environments, inside structures and engines, in clothes, and for health monitoring and assistance. Most of the literature available on this subject focuses on a specific field of optical sensing applications and details their principles of operation. This paper presents a more broad overview, providing the reader with a literature review that describes the main principles of optical sensing and highlights the versatility, advantages, and different real-world applications of optical sensing. Moreover, it includes an overview and discussion of a less common architecture, where optical sensing and Wireless Sensor Networks (WSNs) are integrated to harness the benefits of both worlds.

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Tapered optical fiber geometries and sensing applications based on Mach-Zehnder Interferometer: A review

Cited by 40 publications

References 67 publications

A Taper-in-Taper Structured Interferometric Optical Fiber Sensor for Cu2+ ion Detection

A Taper-in-Taper Structured Interferometric Optical Fiber Sensor for Cu2+ ion Detection

Recent Advances in Optical Hydrogen Sensor including Use of Metal and Metal Alloys: A Review

Optical Fiber Sensors and Sensing Networks: Overview of the Main Principles and Applications

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