AI-Assisted Fiber Optic Sensors for Simultaneous Measurement
In this chapter, a novel ANN-assisted fiber optic sensing system for simultaneous measurement of temperature and strain has been proposed and successfully demonstrated.
Laser Doppler velocimetry based on multi-core fiber
Khotiaintsev et al. proposed a new dual-core optical fiber with 25um core spacing and 125um cladding diameter, achieved the measurement of blood flow . MacPherson W et al.
Fluidic Flow Measurement Using Single Mode-Multimode
In this work, an optical fiber sensor based on a single mode - multimode – single mode (SMS) fiber structure is used to measure the flow in a millimeter-sized Polydimethylsiloxane (PDMS)
Advanced optical measurement techniques for simultaneous fibre
A new measuring method is presented that allows time-resolved quasi-simultaneous measurement of fibre orientation and flow velocity of a transparent fluid such as a substitute fluid for...
Research on high sensitivity optical fiber sensing method for
The optical fiber sensor based on the cantilever is expected to play an important role in the field of ocean flow field measurement because of high sensitivity and the ability to measure velocity
Velocity measurements with structured light transmitted through a
Request PDF | Velocity measurements with structured light transmitted through a multimode optical fiber using digital optical phase conjugation | Lensless fiber microendoscopes
A Novel Fiber Optic Sensor for Microparticle Velocity
A novel fiber optic sensor is proposed to achieve the measurement of single microparticle velocity in a two-dimensional space by translating the cores
Method for simultaneous measurement of velocity and direction of fluid
In this paper, we present a miniature fluidic flow sensor based on a short fiber Bragg grating inscribed in a single mode fiber and heated by Co2+-doped multimode fibers.
An Integrated Interferometric Fiber Optic Sensor Using a
An integrated interferometric fiber optic velocimetry sensor has been proposed and demonstrated at the central wavelength of 638 nm. The sensor is
Industrial Fluid Flow Measurement Using Optical Fiber Sensors: A
Optical fibers have been extensively employed for the development of sensors due to their compact size, immunity to electromagnetic interference, high sensitivity, and multiplexing
Optical fiber flowmeter based on a single mode-multimode
A recent application of an optical fiber to measure a flow has been presented in (Jderu et al., 2021). The proposed sensor relies on the temperature distributed measurement of a heat pulse
Fluid Flow Velocity Measurement in Active Wells Using Fiber Optic
Fluid Flow Velocity Measurement in Active Wells Using Fiber Optic Distributed Acoustic Sensors Nafiseh Vahabi, Member, IEEE, Eero Willman, Hadi Baghsiahi and David R.Selviah, Member, IEEE
An Integrated Interferometric Fiber Optic Sensor Using a
Compared with the velocimeters mentioned above, our proposed interferometric fiber optic sensor using a 638 nm semiconductor laser has the
Method for simultaneous measurement of velocity and direction of fluid
This article presents a fiber-optic method for measuring the velocity of a liquid flow, taking into account the flow direction. The proposed method is based on the use of an optical fiber with an
In Vivo Pulse Wave Measurement Through a Multimode Fiber
We present an MMF-DSCA system for measuring instantaneous blood flow and pulse wave velocity in deep tissue. With a CCD sensor, the diffuse speckle could be captured and
Fluid Flow Velocity Measurement in Active Wells Using Fiber Optic
Real time monitoring of the behaviour of fluids along the whole length of fluid filled well pipes is important to the oil and gas industry as it enables well operators to maximize oil and gas
Velocity measurements with structured light transmitted through a
Velocity measurements of a microchannel flow in the immediate proximity of the fiber end without the use of any imaging lenses are shown. Lensless multimode fiber systems are of interest
A novel velocity band energy workflow for fiber-optic DAS
A quarter-inch control line carrying optical fibers is attached to the outside of the production tubing using steel clamps. The measurement parameters for the distributed acoustic sensor (DAS), as well as the
Bubble velocity, diameter, and void fraction
A fiber optic reflectometer (FOR) technique featuring a single fiber probe is investigated for its feasibility of measuring the bubble velocity, diameter,
Multimode optical fiber photonic doppler velocimetery
Abstract and Figures A new optical fiber head for Photonic Doppler Velocimetry (PDV) made from a combination of fiber types [multimode (MM) and
Transmission Matrix Measurement of Multimode Optical Fibers by
Abstract: Multimode fibers (MMF) are promising candidates to increase the data rate while reducing the space required for optical fiber networks. However, their use is hampered by mode mixing and other
Optical vortices and the flow of their angular momentum in a multimode
The objective of this paper is to study the properties of optical vortices and their angular momenta in the field of a multimode optical fiber. In the second section we, consider eigenfields of an axi- ally
Fluidic Flow Measurement Using Single Mode-Multimode-Single Mode
The measurement of flow in fluidic channels is an essential task required for the proper operation of devices in many interesting applications. In this work, an optical fiber sensor based on a single mode
Differential Mode Delay – group delay, intermodal
What is a Differential Mode Delay? The group velocities of different modes in a multimode fiber are generally different, resulting in mode-dependent group delays
Time-domain multimode dispersion measurement in a higher-order
We present a new multimode dispersion measurement technique based on the time-of-flight method. The modal delay and group velocity dispersion of all excited modes in a few-mode fiber can be
Optical fiber flowmeter based on a single mode-multimode
SMS sensors are made by splicing a short multimode, preferably a two mode or quasi two-mode, optical fiber jumper between single mode pigtails. The interference of the modes
Determination of flow velocities using fiber-optic temperature
A new flow measuring technique is introduced to measure liquid flow velocities under harsh circumstances in environments with dirt, high pressures and elevated temperatures as in
Laser Doppler velocimetry based on multi-core fiber
Fiber laser doppler velocimetry has the advantages of high measurement accuracy, wide measurement range and non-contact measurement. Usually, fiber optic bundles are used in