scholarly journals Tapered fiber sensor in the near infrared wavelength

2019 ◽  
Vol 37 (3) ◽  
pp. 324-330
Author(s):  
Jiang-Yan Li
Keyword(s):  
Chemical Sensors ◽  
Near Infrared ◽  
Electric Field Distribution ◽  
Transmission Spectra ◽  
Interference Structure ◽  
Infrared Wavelength ◽  
Tapered Fiber ◽  
Difference Time ◽  
Refractive Index Detection ◽  
Tapered Structures

AbstractSimulated transmission spectra for tapered fibers with no taper, one taper and two tapers in the near infrared wavelength range, calculated by Finite-Difference-Time-Domain method are currently presented. Transmission peak positions tend to shift to the shorter wavelength when the taper deformation is added to the fiber or the taper width gets narrower. The thickness sensitivity for the tapered structures with different taper thicknesses is about 2.28e-3 nm·µm−1. There is an interference structure in the electric field distribution images, which reveals in the fiber structures. The transmission spectra for the fiber without taper, one taper and two-tapered structures were simulated in near infrared wavelength by FDTD. The transmission spectra for tlated in near infrared wavelength by FDTD. The sensitivity of the fiber was about 50 nm × RIU−1 and it had better refractive index detection. The tapered fiber can be applied to the bio-chemical sensors and physical deformation testing.

scholarly journals Stripping of the Positive-tone Diazonaphthoquinone / Novolak Resist using Laser Irradiation from Visible to Near Infrared Wavelength

2012 ◽  
Vol 25 (6) ◽  
pp. 741-746 ◽  
Author(s):  
Tomosumi Kamimura ◽  
Hiroki Muraoka ◽  
Yuki Yamana ◽  
Yoshiaki Matsura ◽  
Hideo Horibe
Keyword(s):  
Laser Irradiation ◽  
Near Infrared ◽  
Infrared Wavelength

Energy efficiency of near infrared cobalt luminscence in ZnSe:Co determined by a photoacoustic method

2012 ◽  
Vol 20 (1) ◽  
Author(s):  
Ł. Chrobak ◽  
M. Maliński ◽  
K. Strzałkowski ◽  
J. Zakrzewski
Keyword(s):  
Energy Efficiency ◽  
Frequency Dependence ◽  
Near Infrared ◽  
Transmission Spectra ◽  
Photoacoustic Method ◽  
Infrared Luminescence ◽  
Amplitude Characteristics

AbstractThe paper presents results of computations of the energy efficiency of the cobalt luminescence in ZnSe:Co determined by the photoacoustic method. The transmission spectra, photoacoustic experimental and theoretical spectra, and the frequency dependence on the photoacoustic amplitude characteristics are presented. From them, the energy efficiency of Co2+ the near infrared luminescence (3200 nm) was computed in the frame of new proposed photoacoustic model of computations of the luminescence energy efficiency.

Hybridization-sensitive fluorescence control in the near-infrared wavelength range

2011 ◽  
Vol 9 (11) ◽  
pp. 4199 ◽  
Author(s):  
Shuji Ikeda ◽  
Hiroyuki Yanagisawa ◽  
Akiko Nakamura ◽  
Dan Ohtan Wang ◽  
Mizue Yuki ◽  
...  
Keyword(s):  
Wavelength Range ◽  
Near Infrared ◽  
Infrared Wavelength

Metamaterial Window Glass for Adaptable Energy Efficiency

2013 ◽  
Author(s):  
Alex Heltzel ◽  
Tyler Mann ◽  
John R. Howell
Keyword(s):  
Energy Efficiency ◽  
Computational Analysis ◽  
Near Infrared ◽  
Window Glass ◽  
Sustainable Construction ◽  
Nanometer Scale ◽  
Glass Technology ◽  
Optical Wavelengths ◽  
Window Design ◽  
Difference Time

A computational analysis of a metamaterial (MTM) window design is presented for the purpose of increasing the energy efficiency of buildings in seasonal or cold climates. Commercial low-emissivity windows use nanometer-scale Ag films to reflect infrared energy, while retaining most transmission of optical wavelengths for functionality. An opportunity exists to further increase efficiency through a variable emissivity implementation of Ag thin-film structures. 3-D finite-difference time-domain simulations predict nonlinear absorption of near-infrared energy, providing the means to capture a substantial portion of solar energy during cold periods. The effect of various configuration parameters is quantified, with prediction of the net sustainability advantage. MTM window glass technology can be realized as a modification to current, commercial low-emissivity windows through the application of nanomanufactured films, creating the opportunity for both new and after-market sustainable construction.

Growth and Properties of Pulsed Laser Deposited K3Li2Nb5O15 Thin Films

2007 ◽  
Vol 351 ◽  
pp. 184-188 ◽  
Author(s):  
Zu Sheng Zhan ◽  
Yan Sheng Gong ◽  
Qiang Shen ◽  
Lian Meng Zhang
Keyword(s):  
Near Infrared ◽  
Ambient Pressure ◽  
Tungsten Bronze ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Optical Studies ◽  
Tetragonal Tungsten Bronze ◽  
Infrared Wavelength ◽  
Optimum Parameters ◽  
Substrate Temperatures

Potassium lithium niobate (KLN: K3Li2Nb5O15) films have been deposited on quartz glass by Pulsed laser deposition (PLD) technique using a stoichiometric KLN target as starting materials. By investigating the effects of both the oxygen pressure and the substrate temperature on the structure of KLN films, optimum parameters have been identified for the growth of high-quality KLN films. At 10Pa oxygen ambient pressure, tetragonal tungsten-bronze-type structure of KLN films with (310) preferred orientation can be achieved at substrate temperatures in the range of 700-800°C. Optical studies indicate that the films are highly transparent in the visible-near-infrared wavelength range.

scholarly journals Mode Sensitivity Exploration of Silica–Titania Waveguide for Refractive Index Sensing Applications

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7452
Author(s):  
Muhammad A. Butt ◽  
Andrzej Kaźmierczak ◽  
Cuma Tyszkiewicz ◽  
Paweł Karasiński ◽  
Ryszard Piramidowicz
Keyword(s):  
Refractive Index ◽  
High Performance ◽  
Near Infrared ◽  
Sol Gel ◽  
Cost Effective ◽  
Dip Coating ◽  
Infrared Wavelength ◽  
Refractive Index Sensing ◽  
Sensing Applications ◽  
Coating Method

In this paper, a novel and cost-effective photonic platform based on silica–titania material is discussed. The silica–titania thin films were grown utilizing the sol–gel dip-coating method and characterized with the help of the prism-insertion technique. Afterwards, the mode sensitivity analysis of the silica–titania ridge waveguide is investigated via the finite element method. Silica–titania waveguide systems are highly attractive due to their ease of development, low fabrication cost, low propagation losses and operation in both visible and near-infrared wavelength ranges. Finally, a ring resonator (RR) sensor device was modelled for refractive index sensing applications, offering a sensitivity of 230 nm/RIU, a figure of merit (FOM) of 418.2 RIU−1, and Q-factor of 2247.5 at the improved geometric parameters. We believe that the abovementioned integrated photonics platform is highly suitable for high-performance and economically reasonable optical sensing devices.

scholarly journals Near-infrared wavelength intersubband transitions in GaN∕AlN short period superlattices

2006 ◽  
Vol 89 (15) ◽  
pp. 151112 ◽  
Author(s):  
E. A. DeCuir ◽  
Emil Fred ◽  
B. S. Passmore ◽  
A. Muddasani ◽  
M. O. Manasreh ◽  
...  
Keyword(s):  
Near Infrared ◽  
Intersubband Transitions ◽  
Infrared Wavelength ◽  
Short Period ◽  
Short Period Superlattices

Measurement of the Irganox Content in Polypropylene Polymers during Extrusion

2005 ◽  
Vol 13 (3) ◽  
pp. 147-154 ◽  
Author(s):  
Wolfgang Becker ◽  
Norbert Eisenreich
Keyword(s):  
Near Infrared ◽  
Prediction Models ◽  
Partial Least Square ◽  
Least Square ◽  
Partial Least Square Regression ◽  
Process Conditions ◽  
Transmission Spectra ◽  
Mean Square ◽  
Score Plot ◽  
Least Square Regression

Near infrared spectroscopy was used as an in-line control system for the measurement of polypropylene filled with different amounts of Irganox additives. For this purpose transmission probes were installed in an extruder. The probes can withstand temperatures up to 300°C and pressures up to 60 MPa. Transmission spectra of polypropylene mixed with an Irganox additive were recorded. PCA score plot was carried out revealing the influence of varying conditions for the mixing of the sample preparation. Prediction models were generated with partial least square regression which resulted in a model which estimated Irganox with a coefficient of detremination of 0.984 and a root mean square error of prediction of 0.098%. Furthermore the possibilities for controlling process conditions by measuring transmission at a specific wavelength were shown.

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