Effect of boundary on refractive index of PDMS

Martinček, Ivan; Turek, Ivan; Tarjányi, Norbert

doi:10.1364/ome.4.001997

Cited by 13 publications

(6 citation statements)

References 11 publications

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“…As seen from the graphs in figures 2(a) and (b), the minimum temperature limits at which transmission at 1560 nm wavelength becomes less than 1% are different for samples #1 and #2 and amount to -18.5 °C and 0 °C, respectively. The polymer we used has the property of increasing the refractive index at the polymer/fiber interface [28]. Since the entire mass of the thin film is concentrated at this boundary, in contrast to the powder, scattered over the polymer volume, the change in transmission with decreasing temperature will be faster for sample #2 (figure 2(c)).…”

Section: Resultsmentioning

confidence: 99%

Features of repetitively-pulsed oscillation of an erbium fiber laser with a saturable absorber Bi2Te3 covered by silicone at various temperatures

Sudas¹,

Savelyev²,

Кузнецов³

et al. 2021

Phys. Scr.

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The oscillation of erbium doped fiber lasers (EDFL) in the Q-switch mode is investigated. Etched out fiber tapers coated with two types of saturable absorbers (SA) are tested as passive Q-switches. SA of the first type comprises two-component silicone with nano-flakes of a Bi 2 Te 3 single crystal dissolved in it. A thin film of Bi 2 Te 3 synthesized by the Metalorganic Chemical Vapor Deposition (MOCVD) method on the surface of the fiber taper and coated with the same silicone served as SA of the second type. Housed within a refrigerator the fabricated sample of fiber taper with SA was in series plug into the fiber ring of the laser. A maximum is observed in the temperature dependence of the EDFL pulse repetition rate with both types of Q-switches. A decrease in temperature to -4 °C (for the first type) and to 9.5 °C (for the second one) led to the oscillation wavelength change from 1560 to 1530 nm. Cooling of Q-switches of the first and second types was accompanied by a decrease in the duration of laser pulses by a factor of 2.5 and 3.5, respectively, at a pump power corresponded to the conversion of laser oscillation from CW to repetitively-pulsed mode. At a given laser pump power, a 20% and 40% increment in the pulse repetition rate is observed upon cooling of passive Q-switches based on Bi 2 Te 3 nanopowder-in-polymer and Bi 2 Te 3 thin-film, up to temperatures of -14.8 °C and 4.4 °C, respectively, as compared to that one at room temperature. A diminution in the temperature of a passive Q-switch made it possible to obtain pulsed laser oscillation in a circuit that did not support the pulsed mode at room temperature.

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Section: Resultsmentioning

confidence: 99%

Features of repetitively-pulsed oscillation of an erbium fiber laser with a saturable absorber Bi2Te3 covered by silicone at various temperatures

Sudas¹,

Savelyev²,

Кузнецов³

et al. 2021

Phys. Scr.

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“…In particular, the TiO 2 particles were acquired in powder form with a mean diameter of 1 μ m. The size distribution of these particles and how spherical they were was never established. It has also been shown that PDMS can acquire refractive index inhomogeneity at interfaces with other materials and PDMS itself (i.e., at a PDMS-PDMS interface) [ 31 ]. Whilst this could also explain a deviation in the observed scattering coefficient in the “OBEL” phantom, it may also describe the origin of the vertical line type feature running along the left hand vertical edges of the “B”, “E” and “L” letters in the experimental image.…”

Section: Discussionmentioning

confidence: 99%

Realistic simulation and experiment reveals the importance of scatterer microstructure in optical coherence tomography image formation

Ossowski

Curatolo

Sampson

et al. 2018

Biomed. Opt. Express

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Realistic simulation of image formation in optical coherence tomography, based on Maxwell’s equations, has recently been demonstrated for sample volumes of practical significance. Yet, there remains a limitation whereby reducing the size of cells used to construct a computational grid, thus allowing for a more realistic representation of scatterer microstructure, necessarily reduces the overall sample size that can be modelled. This is a significant problem since, as is well known, the microstructure of a scatterer significantly influences its scattering properties. Here we demonstrate that an optimized scatterer design can overcome this problem resulting in good agreement between simulated and experimental images for a structured phantom. This approach to OCT image simulation allows for image formation for biological tissues to be simulated with unprecedented realism.

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“…Moreover, PDMS can reduce the time and elaboration or refinement of components [16,17] for previously mentioned feature characteristic of PDMS, has been applied to the enhancement of microelectronic components, sensors, valves, detectors, filters, solid elastic lenses, and antenna substrate for microelectromechanical systems (MEMS) [18]. On the other hand, there is significant literature or on the physical and chemical properties of PDMS, which involved specific synthesis processes like curing agents molding ratio, temperature and curing times, composite materials, among others [19][20][21][22][23][24]. To enhance the PDMS's relatively low elastic modulus, we need to reinforce or filter out polymers with desired composites or ceramics, leading to more suitable characteristics, such as surface energy compatibility modulus and superior hydrophobicity [25].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Evaluation of Conductive Polymeric Composite from Metals Alloys and Graphene to Be Future Flexible Antenna Device

Abdelrahman¹,

Erchiqui

Nedil

2021

Advances in Materials Science

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Every year hundreds of serious accidents and catastrophic are accompanied by mining sector services as disaster, flooding, and demolition. To reduce the severity of the results such as high death numbers, lost communication inner and out mining, we have to find an easy way to improve communication means during that problems. In this paper, we reach out to fabricate durable, flexible, and wearable chaps, in addition to an easier carrier with highly efficient receiving and sending a signal at 2.4 GHz broad wide band. By doping a bunch of unique conductive metals (silver, copper, and gallium indium alloy) assembled on Graphene, its integration inside Polydimethylsiloxane to be future applicable antenna. Furthermore, we studied the physical and electric properties of a composite including Electrochemical Impedance properties (EIS), cyclic voltammetry (CV), and its thermal stability chip (DSC), as well as, using Transmission electron microscopy (TEM), and, scanning electron microscopy (SEM) techniques to clarify the surface morphology of fabricated materials. In addition to various measurements had been carried out such as Ultraviolet-visible, inductively coupled plasma (ICP) spectroscopy, and Energy-dispersive X-ray spectroscopy (EDX) to reinforce and elucidate the solid-state of ions inside fabricated Antenna. On the other hand, throughout stress-strain for the stretchability of fabricated is expanded to 30% of its original length, in addition to thermal stability reached to 485°C compared to pure PDMS substrate, with enhancing electric conductivity of composite ship.

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Effect of boundary on refractive index of PDMS

Cited by 13 publications

References 11 publications

Features of repetitively-pulsed oscillation of an erbium fiber laser with a saturable absorber Bi2Te3 covered by silicone at various temperatures

Features of repetitively-pulsed oscillation of an erbium fiber laser with a saturable absorber Bi2Te3 covered by silicone at various temperatures

Realistic simulation and experiment reveals the importance of scatterer microstructure in optical coherence tomography image formation

Preparation and Evaluation of Conductive Polymeric Composite from Metals Alloys and Graphene to Be Future Flexible Antenna Device

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