scholarly journals A highly compact and cost-effective 2-beamsuper-resolution structured illuminationmicroscope based on all-fiber optic components

2021 ◽  
Author(s):  
Thomas Huser ◽  
Jakub Pospisil ◽  
Karel Fliegel ◽  
Miloš Klíma ◽  
Gerd Wiebusch
Keyword(s):  
Fiber Optic ◽  
Cost Effective

Plasma enhanced label-free immunoassay for alpha-fetoprotein based on a U-bend fiber-optic LSPR biosensor

RSC Advances ◽  
2015 ◽  
Vol 5 (31) ◽  
pp. 23990-23998 ◽  
Author(s):  
Gaoling Liang ◽  
Zhongjun Zhao ◽  
Yin Wei ◽  
Kunping Liu ◽  
Wenqian Hou ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Fiber Optic ◽  
Cost Effective ◽  
Alpha Fetoprotein ◽  
Localized Surface Plasmon ◽  
Label Free

A simple, label-free and cost-effective localized surface plasmon resonance (LSPR) immunosensing method was developed for detection of alpha-fetoprotein (AFP).

Detecting and Correcting Pipeline Leaks Before They Become a Big Problem

2015 ◽  
Vol 49 (1) ◽  
pp. 31-46 ◽  
Author(s):  
Ron Cramer ◽  
David Shaw ◽  
Robert Tulalian ◽  
Pabs Angelo ◽  
Maarten van Stuijvenberg
Keyword(s):  
Acoustic Wave ◽  
Real Time ◽  
Fiber Optic ◽  
Cost Effective ◽  
Leak Detection ◽  
Rate Of Change ◽  
Fiber Optic Cable ◽  
History Of ◽  
Distributed Acoustic Sensing ◽  
Critical Lines

AbstractTimely pipeline leak detection is a significant business issue in view of a long history of catastrophic incidents and growing intolerance for such events. It is vital to flag containment loss and location quickly, credibly, and reliably for all green or brown field critical lines in order to shut down the line safely and isolate the leak. Pipelines are designed to transport hydrocarbons safely; however, leaks have severe safety, economic, environmental, and reputational effects. This paper will highlight robust, reliable, and cost-effective methods, most of which leverage real-time instrumentation, telecommunications, SCADA, DCS, and associated online leak detection applications. The purpose of this paper will be to review the underlying leak detection business issues, catalogue the functional challenges, and describe experiences with available technologies. Internal and external techniques will be described, including basic rate of change of flow and pressure, compensated mass balance, statistical, real-time transient modeling, acoustic wave sensing, fiber optic cable (distributed temperature, distributed acoustic sensing), and subsea hydrophones. The paper will also describe related credibility, deployment, organizational, and maintenance issues with an emphasis on upstream applications. The scope will include leak detection for pipelines conveying various flowing fluids—gas, liquid, and multiphase flow. Pipeline environments will include subsea and onshore. Advantages, disadvantages, and experiences with these techniques will be described and analyzed.

Hybrid Solar Lighting System Cost and Performance Analysis

2001 ◽  
Author(s):  
Michael T. Panich ◽  
Eric E. Carlson ◽  
Michael F. Jerla
Keyword(s):  
Solar Radiation ◽  
Fiber Optic ◽  
Tracking System ◽  
Cost Effective ◽  
Photovoltaic Cell ◽  
Commercial Building ◽  
Full Spectrum ◽  
Electric System ◽  
Solar Lighting ◽  
And Performance

Abstract This paper reports on the methodology and results of a preliminary analysis of a hybrid solar lighting concept that has the potential to provide cost-effective topside daylighting to the core areas of commercial buildings of all types. The presented hybrid lighting concept also includes a “full spectrum” dish-type concentrating solar collector. This collector uses both the incident visible and infrared solar radiation to provide both daylighting and electric power. The incident solar radiation is separated using cold mirror technology. Visible light is sent to a fiber optic bundle for routing to integrated fiber optic/fluorescent luminaires within the building. Separated infrared solar radiation is focused on a photovoltaic cell and converted to electricity. The electricity produced provides self-powering of the collector solar tracking system and the excess electricity produced is sent into the grid-connected commercial building electric system. The paper presents the potential for performance increases/cost reductions in the technology and the current and future cost competitiveness of this promising solar technology.

scholarly journals Based on FP LDs with split band technique in two-channel fiber optical CATV transport system

2018 ◽  
Vol 185 ◽  
pp. 00015
Author(s):  
Wen-Shing Tsai ◽  
Hong-Yu Dai ◽  
Chung-Yi Li
Keyword(s):  
Transport System ◽  
Fiber Optic ◽  
Single Mode ◽  
Cost Effective ◽  
Single Mode Fiber ◽  
Transport Systems ◽  
Transmission Scheme ◽  
Fabry Perot ◽  
Fiber Optical ◽  
Split Band

This study proposes a two-channel fiber optic cable television (CATV) transport system based on Fabry–Perot laser diodes (FP-LDs) with a split band technique. To reduce the interference between channels, we apply the split band technique to two channels with different frequencies by using two converters at each moment. In this two-channel transmission scheme, composite second-order (CSO) and composite triple-beat (CTB) distortions induced by the systems are possibly confined in unused channels and result in good transmission performances. Through a 40 km standard single-mode fiber transmission, excellent performances of carrier-to-noise ratio (≥50 dB), CSO (≥70 dB), and CTB (≥72 dB) are obtained using the proposed fiber optic CATV transport systems. The proposed systems employing FP-LDs with a split band technique are also simpler and more cost effective than conventional externally modulated systems.

scholarly journals Enhanced Distributed Fiber Optic Vibration Sensing and Simultaneous Temperature Gradient Sensing Using Traditional C-OTDR and Structured Fiber with Scattering Dots

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4114 ◽  
Author(s):  
Konstantin Hicke ◽  
René Eisermann ◽  
Sebastian Chruscicki
Keyword(s):  
Fiber Optic ◽  
Low Frequency ◽  
Single Mode ◽  
Cost Effective ◽  
Time Domain Reflectometry ◽  
Gradient Sensing ◽  
Beneficial Effects ◽  
Vibration Sensing ◽  
Optical Time ◽  
And Performance

We present results demonstrating several beneficial effects on distributed fiber optic vibration sensing (DVS) functionality and performance resulting from utilizing standard single mode optical fiber (SMF) with femtosecond laser-inscribed equally-spaced simple scattering dots. This modification is particularly useful when using traditional single-wavelength amplitude-based coherent optical time domain reflectometry (C-OTDR) as sensing method. Local sensitivity is increased in quasi-distributed interferometric sensing zones which are formed by the fiber segments between subsequent pairs of the scattering dots. The otherwise nonlinear transfer function is overwritten with that of an ordinary two-beam interferometer. This linearizes the phase response to monotonous temperature variations. Furthermore, sensitivity fading is mitigated and the demodulation of low-frequency signals is enabled. The modification also allows for the quantitative determination of local temperature gradients directly from the C-OTDR intensity traces. The dots’ reflectivities and thus the induced attenuation can be tuned via the inscription process parameters. Our approach is a simple, robust and cost-effective way to gain these sensing improvements without the need for more sophisticated interrogator technology or more complex fiber structuring, e.g., based on ultra-weak FBG arrays. Our claims are substantiated by experimental evidence.

scholarly journals An experimental analysis on the performance of single mode-multimode-single mode and multimode- single mode-multimode fiber optic sensor

2019 ◽  
Vol 15 (1) ◽  
pp. 80-84 ◽  
Author(s):  
Hanim Abdul Razak
Keyword(s):  
Refractive Index ◽  
Fiber Optic ◽  
Sucrose Solution ◽  
Single Mode ◽  
Cost Effective ◽  
Fiber Optic Sensor ◽  
Superior Performance ◽  
Mode Structure ◽  
Optic Sensor ◽  
Operating Wavelength

A cost effective and simple fabrication process for Mach Zehnder Interferometer (MZI) fiber based sensor has been proposed based on single mode-multimode-single mode structure and multimode-single mode-multimode. These proposed structures employed a standard fusion arc splicing by varying the length of sensing region instead of the structures. This sensor has been experimentally demonstrated for three different concentration of solutions such as water, 1mol sucrose solution and oil with the refractive index of 1.333, 1.384 and 1.464 respectively. Furthermore, the intention of this experiment is to determine which structure that provides superior performance in terms of the sensitivity of the device. The operating wavelength of different structures corresponds to the different refractive index. It is observed that the shifting response was influenced by the length of the sensing-area and the best sensitivity achieved for is -10.45nm/RIU.

scholarly journals An Innovative Polyaniline/Platinum-Coated Fiber Optic – Surface Plasmon Resonance Sensor for Picomolar Detection of 4-Nitrophenol

2021 ◽  
Author(s):  
Iulia ANTOHE ◽  
Iuliana IORDACHE ◽  
Vlad-Andrei ANTOHE ◽  
Gabriel SOCOL
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Fiber Optic ◽  
Limit Of Detection ◽  
Low Cost ◽  
Cost Effective ◽  
Coated Fiber ◽  
Highly Sensitive ◽  
Resonance Sensor

Abstract The paper reports for the first time an innovative polyaniline (PANI)/platinum (Pt)-coated fiber optic – surface plasmon resonance (FO-SPR) sensor used for highly-sensitive 4-nitrophenol (4-NP) pollutant detection. The Pt thin film was coated over an unclad core of an optical fiber (FO) using a DC magnetron sputtering technique, while the 4-NP responsive PANI layer was synthetized using a cost-effective electroless polymerization method. The presence of the electrolessly-grown PANI on the Pt-coated FO was observed by field-emission scanning electron microscopy (FE-SEM) and subsequently evidenced by energy dispersive X-ray analysis (EDX). These FO-SPR sensors with a demonstrated sensitivity of 1515 nm/RIU were then employed for 4-NP sensing, exhibiting am excellent limit of detection (LOD) in the low picomolar range (0.17 pM). The proposed sensor’s configuration has many other advantages, such as low-cost production, small size, immunity to electromagnetic interferences, remote sensing capability, and moreover, can be operated as a “stand-alone device”, making it thus well-suited for applications such as “on-site” screening of extremely low-level trace pollutants.

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