Scholarly References to Photonwares Products

Published 2019

DOI: 10.1163/1874-6772_seg_a60_1962

Abstract:

Contents of two historical bottles recovered during the repair of the historic Fremont Street retaining wall in Deadwood, SD became an analysis project for two students, conducted in collaboration with the Historical District of Deadwood and the Anthropology Department at Augustana University. One bottle, labeled Harper's Headache Medicine, contained several spots of dark, dried material. The other bottle, labeled Kirk G. Phillips Druggist Deadwood So. Dak., was about half full of a colorless liquid and a white solid. Raman, 1H NMR...

Excerpt:

Baseline correction and advanced ATR correction were applied to the ATR spectra. An Agiltron PeakSeeker Raman Spectrometer was used to analyze the liquid from the Phillips bottle...

Published 2018

Isabela Maia Toaldo Universidade Federal de Santa Catarina

Vinícius Caliari Pesquisador Epagri Estação Experimental de Videira, Professor Unoesc Videira

DOI: 10.1016/j.foodres.2018.11.012

Abstract:

The effect of mannoproteins on the evolution of rosé sparkling wines during over-lees aging was investigated on the basis of the chemical characterization of polyphenols, organic acids, macro-and microelements using a combined analytical approach. Variations on these constituents were assessed using Raman and near-infrared spectroscopy. During the biological aging, caffeic acid, catechin, gallic acid and malvidin-3-O-glucoside were the most abundant polyphenolics in the rosé wines. The phenolic compound tyrosol, a fermentation...

Excerpt:

Near - infrared spectra were collected using an FT - NIR spectrometer Frontier 400 (Perkin Elmer, USA) and the spectrum acquisition was performed from 9090.91 cm - 1 to 4000.00 cm - 1 . While the Raman spectroscopy analysis was performed using a PeakSeeker Pro - 785, Agiltron, (Ocean Optics, USA). The Raman measurements were carried out from 250 to 1800 cm - 1 , with an excitation laser power of 100 mW (785 nm) , the integration time of 60 s, and the frame of 10 s...

Published 2018

Aftab Ahmad Khan COMSAT Institute of Information Technology Abbottabta

Dr. Muhammad Bilal National Institute of Lasers and Optronics, Nilore, Islamabad, Pakistan

DOI: 10.1016/j.pdpdt.2018.10.014

Abstract:

We present the effectiveness of Raman spectroscopy (RS) in combination with machine learning for screening and analysis of blood sera collected from tuberculosis patients. Blood samples of 60 patients have confirmed active pulmonary tuberculosis and 14 samples of healthy age matched control were used in the current study. Spectra from entire sera samples were acquired using 785 nm laser Raman system. Support Vector Machine (SVM) together with Principal Component Analysis (PCA) has been used for highlighting variations...

Excerpt:

An integrated system also has a microscope (RSM - 785, Agiltron) for viewing the sample. An objective lens having numerical aper ture of 0.25 was used for tight focusing of laser beam onto the sample surface. In - elastically scattered Raman light was also collected though same objective...

Published 2018

Raffaele Santagati Quantum Lab @ Boehringer-Ingelheim

DOI: 10.1364/optica.3.000127

Abstract:

The maturation of many photonic technologies from individual components to next-generation system-level circuits will require exceptional active control of complex states of light. A prime example is in quantum photonic technology: while single-photon processes are often probabilistic, it has been shown in theory that rapid and adaptive feedforward operations are sufficient to enable scalability. Here, we use simple “off-the-shelf” optical components to demonstrate active multiplexing—adaptive rerouting to single modes—of...

Excerpt:

Polarization-maintaining switches (Agiltron, 1 dB loss per switch, 500 kHz max operation frequency) were based on an electro-optic material...

Published 2018

Sheroz Khan Professor, International islamic University Malaysia

Shahzad Ahmad Qureshi, PhD Pakistan Institute of Engineering and Applied Sciences

DOI: 10.1364/boe.9.002041

Abstract:

This work presents a diagnostic system for the hepatitis C infection using Raman spectroscopy and proximity based classification. The proposed method exploits transformed Raman spectra using the proximity based machine learning technique and is denoted as RS-PCA-Prox. First, Raman spectral data is baseline corrected by subtracting noise and low intensity background. After this, a feature transformation of Raman spectra is adopted, not only to reduce the feature's dimensionality but also to learn different deviations in Raman...

Excerpt:

Acquiring Raman spectra For the recording of Raman spectrum, the quantity of about 10 l blood serum of each sample is put on an aluminum substrate. Raman system (PeakSeeker Pro, Agiltron USA) has been used for recording of spectra. This system consists of laser sour ce coupled with the microscope emitting laser light at 785nm...

Published 2018

Ashfaque Khan Scientist, Propulsion Division, CSIR - NAL, Bangalore

Asifullah Khan Department of Computer and Information Sciences, PIEAS, Pakistan

Ali Nawaz Khan Professor/Consultant Radiologist

Dr. Muhammad Bilal National Institute of Lasers and Optronics, Nilore, Islamabad, Pakistan

DOI: 10.1016/j.pdpdt.2018.05.010

Abstract:

This study presents the analysis of hepatitis B virus (HBV) infection in human blood serum using Raman spectroscopy combined with pattern recognition technique. In total, 119 confirmed samples of HBV infected sera, collected from Pakistan Atomic Energy Commission (PAEC) general hospital have been used for the current analysis. The differences between normal and HBV infected samples have been evaluated using support vector machine (SVM) algorithm. SVM model with two different kernels ie polynomial...

Excerpt:

All the Raman spectra were acquired from the surface of the serum droplet using Raman system (Peak Seeker PRO - 785). The system consists of inbuilt diode laser emitting light at 785 nm, coupled with inverted microscope ( RSM - 785, Agiltron, USA). In contrast to 532 nm, the fluorescence signal decreases prominently for 785 nm laser, making detection of the weak Raman signal easier...

Published 2018

Cong Du The University of Massachusetts Lowell

Qixiang Tang University of Massachusetts Lowell

Xu Guo PhD in Electrical and Computer Engineering, UMass Lowell

Jingcheng Zhou Postdoc, UC San Diego; PhD, UMass

Tzuyang Yu Associate Professor of Civil Engineering, UMass Lowell

DOI: 10.3390/s18051353

Abstract:

This article presents an application of an active all-optical photoacoustic sensing system with four elements for steel rebar corrosion monitoring. The sensor utilized a photoacoustic mechanism of gold nanocomposites to generate 8 MHz broadband ultrasound pulses in 0.4 mm compact space. A nanosecond 532 nm pulsed laser and 400 μm multimode fiber were employed to incite an ultrasound reaction. The fiber Bragg gratings were used as distributed ultrasound detectors. Accelerated corrosion testing was applied to four sections of a single...

Excerpt:

Finally, an ultraviolet glue (365A, Agiltron, Woburn, MA, USA) was covered on the fibers for protection...

Published 2018

Peng Zhang, Xiaoyan Li, Lizhong Zhang, Tianshu Wang, Huilin Jiang National and Local Joint Engineering Research Center of Space Optoelectronics Technology, Changchun University of Science and Technology, Changchun 130022, China

DOI: 10.1364/AO.56.009742

Abstract:

A 1.7 μm band tunable narrow-linewidth Raman fiber laser based on spectrally sliced amplified spontaneous emission (SS-ASE) and multiple filter structures is proposed and experimentally demonstrated. In this scheme, an SS-ASE source is employed as a pump source in order to avoid stimulated Brillouin scattering. The ring configuration includes a 500 m long high nonlinear optical fiber and a 10 km long dispersion shifted fiber as the gain medium. A segment of un-pumped polarization-maintaining erbium-doped fiber is used to modify the shape of the spectrum. Furthermore, a nonlinear polarization rotation scheme is applied as the wavelength selector to generate lasers. A high-finesse ring filter and a ring filter are used to narrow the linewidth of the laser, respectively. We demonstrate tuning capabilities of a single laser over 28 nm between 1652 nm and 1680 nm by adjusting the polarization controller (PC) and tunable filter. The tunable laser has a 0.023 nm effective linewidth with the high-finesse ring filter. The stable multi-wavelength laser operation of up to four wavelengths can be obtained by adjusting the PC carefully when the pump power increases.

Published 2018

Harith Ahmad University of Malaya

Muhamad Zharif Samion Photonics Research Centre, University of Malaya

Anir Syazwan Sharbirin PhD, Photonics Research Centre, University of Malaya

Mohammad Faizal Ismail (Ismail, M.F.) Photonics Research Centre, University of Malaya

DOI: 10.1016/j.yofte.2018.10.018

Abstract:

In this work, a thin Mo 0.8 W 0.2 S 2 film is proposed and fabricated for the use as a saturable absorber (SA) in a thulium-doped fiber laser (TDFL) cavity. The few-layer Mo 0.8 W 0.2 S 2 nanoparticles are obtained through hydrothermal exfoliation as a thin film and suspended in a polymer host, which is then placed between two fiber ferrules to serve as an SA. The proposed laser is capable of generating outputs with a maximum repetition rate of 65.79 kHz and a minimum pulse width of 1.84 µs at the maximum pump power of 168.92...

Excerpt:

...this pulse signal now travels along the laser cavity until it reaches a 2.0 ?m TBPF, which provides an advantage of tuning the output wavelength. The TBPF used is manufactured by Agiltron and has an insertion loss of 1.0 to 4.0 dB that varies in accordance to the wavelength...

Published 2017

Buddini I Karawdeniya Australian National University

Jason R. Dwyer Professor of Chemistry, University of Rhode Island

Anju Gupta Assistant Professor

DOI: 10.23860/thesis-kohr-elizabeth-2017

Abstract:

Rhodamine 6G is spin-cast onto gold surfaces and the reflectance, emission, excitation, and SERS spectra are reported. Electron microscopy shows that the particle sizes of the gold are uniform for all preparations. Reflection spectra demonstrate the spectroscopic signature for Rh6G aggregates for thicker films and that the gold plasmon band shifts due to the refractive index change on the surface. The intensity of the SERS spectra increases with increasing surface coverage but the change is nonlinear between submonolayer and multilayer surface...

Excerpt:

The reflection spectra were obtained using a Filmetrics F40 microscope with a tungstenhalogen light source from 4501000 nm. Raman spectra were obtained on an Agiltron PeakSeeker spectroscope with a 785 nm laser set at 300 mW and an integration time of 30 seconds...