Adjustable optical fiber displacement-curvature sensor based on macro-bending losses with a coding of optical signal intensity

SS Al-Lami, HK Atea, AM Salman… - Sensors and Actuators A …, 2024‏ - Elsevier
In this work, a simple design and cost-effective displacement-curvature sensor based on
macro-bend single-mode fiber (SMF) is planned and demonstrated. The optical fiber sensor …

Vernier effect based on cascading two Mach–Zehnder interferometers for selectable comb filter and saturable absorber applications in erbium-doped fiber laser

HA Al-Rubaiyee, SK Al-Hayali, SW Harun… - Optical Fiber …, 2024‏ - Elsevier
We present the applications of a Vernier effect based on cascading two Mach–Zehnder
interferometers (MZIs) as a selectable comb filter and saturable absorber (SA) in an erbium …

All fiber, highly sensitive sensor based on gold nanoparticle-coated macrobent single mode fiber for human temperature monitoring

DI Al-Janabi, AM Salman… - Journal of …, 2020‏ - spiedigitallibrary.org
A compact all-fiber temperature sensor based on a gold nanoparticle (GNP)-coated
macrobent standard single-mode fiber (SMF) has been proposed and experimentally …

Wearable macro-bend optical fiber sensor for biomechanical motion evaluation

SS Al-Lami, AM Salman, A Al-Janabi - Optical Fiber Technology, 2023‏ - Elsevier
The biocompatibility and other unique physical properties of optical fibers reflect their
potential for use in biomechanical motion sensing. In this paper, a wearable macro-bending …

Sensitivity-enhanced moisture sensor based on θ-shape bending fiber coated with copper-polyvinyl alcohol thin film

AM Salman, SK Al-Hayali, A Al-Janabi - IEEE Sensors Journal, 2021‏ - ieeexplore.ieee.org
This paper presents a compact and easy fabrication of a moisture sensing probe based on
macro-bending loss induces in a-shaped Mach-Zehnder interferometer (MZI) for the first …

No-core fiber interferometry pH sensor based on a polyvinyl alcohol/polyacrylic acid and silica/polyvinyl alcohol/polyacrylic acid hydrogel coating

TA Abdzaid, HJ Taher - Applied Optics, 2021‏ - opg.optica.org
In this paper, we present an investigation on the sensing performance of a pH sensor based
on a modal interferometer formed by a simple NO-core fiber interferometer (NCFI) that …

Switchable mode-locked ytterbium-doped fiber laser based on macrobending loss tuning of figure-eight knot fiber structure

A Al-Janabi, HQ Merza, SK Al-Hayali… - Optical …, 2024‏ - spiedigitallibrary.org
We report on the demonstration of a switchable and adjustable spacing multiwavelength
nanosecond pulsed ytterbium-doped fiber laser (YDFL) operating in a mode-locking regime …

Wide-range pH sensor based on a cascaded MZI up-down tapered hetero-core structure

S Hussein Mahmood, S Kadhim Al-Hayali… - Applied Optics, 2024‏ - opg.optica.org
In this paper, we describe the first demonstration of an optical fiber sensor based on two
cascaded architectures of the Mach–Zehnder interferometer (MZI) with an up-down-tapered …

Tapered coreless optical fiber-based refractive index sensor for acetone concentration detection

YH Kadhum, AM Salman, A Al-Janabi - Optics Continuum, 2024‏ - opg.optica.org
A fast-response optical fiber sensor is designed and fabricated to detect different
concentrations of volatile acetone. The proposed sensor structure was fabricated by splicing …

Highly sensitive fiber optic humidity sensor based on polyvinyl alcohol Fabry–Perot

SL Khashin, SA Mohammed, HJ Taher - Optics Continuum, 2022‏ - opg.optica.org
In this paper, a fiber optic Fabry–Perot (FP) for relative humidity (RH) sensing is presented.
The proposed FP cavity is constructed by splicing a 50-mm length of no-core fiber (NCF) in a …