Optical Fiber Interferometers and Their Applications

Bahrampour, Abbas; Tofighi, Sara; Bathaee, M.; Farman, Farnaz

doi:10.5772/34346

Cited by 9 publications

(2 citation statements)

References 66 publications

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“…Mach-Zehnder interferometers (MZIs) have been implemented as optical devices in multiple sensing applications because of their flexible configurations (Bahrampour 2012). Their optical fiber integrated version is based on the same working principle using a different optical element (Fig.…”

Section: Mach-zehndermentioning

confidence: 99%

Strain Monitoring

Vanlanduit

Sorgente²,

Zadeh³

et al. 2021

Structural Health Monitoring Damage Detection Systems for Aerospace

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This chapter provides an overview of the use of strain sensors for structural health monitoring. Compared to acceleration-based sensors, strain sensors can measure the deformation of a structure at very low frequencies (up to DC) and enable the measurement of ultrasonic responses. Many existing SHM methods make use of strain measurement data. Furthermore, strain sensors can be easily integrated in (aircraft) structures. This chapter discusses the working principle of traditional strain gauges (Sect. 8.1) and different types of optical fiber sensors (Sect. 8.2). The installation requirements of strain sensors and the required hardware for reading out sensors are provided. We will also give an overview of the advantages and the limitations of commonly used strain sensors. Finally, we will present an overview of the applications of strain sensors for structural health monitoring in the aeronautics field.

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Section: Mach-zehndermentioning

confidence: 99%

Strain Monitoring

Vanlanduit

Sorgente²,

Zadeh³

et al. 2021

Structural Health Monitoring Damage Detection Systems for Aerospace

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“…Interferometric sensors can be produced in optical fibers or integrated optical waveguides. Generally, optical fibers can avoid problems related to channel blocking [205] and enable manufacturing of compact and economical equipment [206], but integrated optics offer greater flexibility in the geometry of the design and the combination of materials, allowing greater complexity and ease of access to the optical path in evanescent field sensing [197]. Sensing surfaces are generally prepared by depositing on the surface of a glass substrate an optically transparent thin layer of a high refractive index, such as silicon nitride (Si 3 N 4 ) [207,208] or tantalum pentoxide (Ta 2 O 5 ) [209,210].…”

Section: Interferometric Biosensorsmentioning

confidence: 99%

Optical Biosensors for Label-Free Detection of Small Molecules

Peltomaa

Glahn-Martínez

Benito‐Peña

et al. 2018

Sensors

165

111

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Label-free optical biosensors are an intriguing option for the analyses of many analytes, as they offer several advantages such as high sensitivity, direct and real-time measurement in addition to multiplexing capabilities. However, development of label-free optical biosensors for small molecules can be challenging as most of them are not naturally chromogenic or fluorescent, and in some cases, the sensor response is related to the size of the analyte. To overcome some of the limitations associated with the analysis of biologically, pharmacologically, or environmentally relevant compounds of low molecular weight, recent advances in the field have improved the detection of these analytes using outstanding methodology, instrumentation, recognition elements, or immobilization strategies. In this review, we aim to introduce some of the latest developments in the field of label-free optical biosensors with the focus on applications with novel innovations to overcome the challenges related to small molecule detection. Optical label-free methods with different transduction schemes, including evanescent wave and optical fiber sensors, surface plasmon resonance, surface-enhanced Raman spectroscopy, and interferometry, using various biorecognition elements, such as antibodies, aptamers, enzymes, and bioinspired molecularly imprinted polymers, are reviewed.

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Optical fiber interferometer application for high electron density measurements on compact torus plasmas

Zhang

Chen

Lan

et al. 2020

Review of Scientific Instruments

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An optical fiber Mach–Zehnder interferometer at a wavelength of 1.55 µm has been developed for measurements of high electron density on compact torus (CT) plasmas with a high time resolution of 0.1 µs and high phase resolution of 6.4 × 10−4 rad. To improve density measurement accuracy, the phase noise of the interferometer has been investigated in detail and optimized. In the bench test, the interferometer was calibrated using a piezoelectric ceramic actuator with known stroke. Initial results on CT plasma show that the optical fiber interferometer provides reliable density measurements at two spatial locations and the bulk velocity of plasma can be determined by the method of time of flight.

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Optical Fiber Interferometers and Their Applications

Cited by 9 publications

References 66 publications

Strain Monitoring

Strain Monitoring

Optical Biosensors for Label-Free Detection of Small Molecules

Optical fiber interferometer application for high electron density measurements on compact torus plasmas

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