European Meet on Laser, Optics & Photonics November 12-13, 2020 Budapest, Hungary

Biography:

Mario F. S. Ferreira graduated in Physics from the University of Porto, Portugal,  and received the Ph.D. degree in Physics in 1992 from the University of Aveiro, Portugal, where he is now a Professor at the Physics Department. Between 1990 and 1991 he was at the University of Essex, UK, performing experimental work on external cavity semiconductor lasers and nonlinear optical fiber amplifiers.

Abstract:

We introduce the concept of dissipative solitons , which emerge as a result of a double balance: between nonlinearity and dispersion and also between gain and loss. Such dissipative solitons have many unique properties which differ from those of their conservative counterparts and which make them similar to living things. We focus our discussion on dissipative solitons in fiber lasers, which can be described by the cubic-quintic complex Ginzburg-Landau equation (CGLE). In the field of nonlinear optics, the CGLE can describe also several other systems, namely optical parametric oscillators, free-electron laser oscillators, and all-optical transmission lines.

Biography:

I am Ehsan Kamani was born in 1994 in Iran. I am a graduate of the field of optics and laser engineering. I started studyingand Research the use of lasers in medicine since 2014. I am mighty in the field of laser I have an intense internal drive . I am eager to learn and study further.medicine research and treatment and passion, and the willingness to take a chance, to fail if necessary, and to start the process all over again. I have a passion for research to be able to make life better for people affected by diseases and it is far more important than anything to me. Working in a place nearby cancer department of Shohada University and watching patients affected by cancer complications made me think how I can help these people.

Abstract:

In the name of Creator of Light Laser is a technology used in various medical fields. After the revolution, Penny Celine has been in the medicine of this laser, which has revolutionized medicine I have studied and studied laser applications in medical sciences, and I have been able to get the right information in this area. Application of laser in drug delivery of cancer tissue,Using a laser and a method for making drugs with nanoparticles, we can use the laser wavelength and appropriate selection of drugs and nanoparticles to target tissues that are used in drug delivery. People with cancer have an important role in minimizing the side effects of chemotherapy. Application of Lasers to Improve Endocrine Activity: By using appropriate wavelength lasers and energy, we can influence the process of recovery of the activity of the glands, which is used to improve the thyroid gland, pancreas and saliva.Application of laser in lowering blood pressure: Using low-level lasers can be treated intraarticular and topically in the process of reducing blood pressure Laser application in blood cell proliferation: We can play an important role in laboratory culture using laser light and proper wavelength in the process of white blood cell proliferation, red blood cells, and platelets. This process

Biography:

Ahmed Aissani est actuellement Maitre de conférences a  l. Universite des Sciences et de la Technologie Houari Boumediene d Alger (Algerie) et Maitre de recherche au Laboratoire d’Electronique Quantique, situe vau sein de la meme universite.  

Abstract:

It is well known that the Lamb dip characterizing the emitted line shape at the output of a low gain gas laser, can be used as a good frequency standard. It is for this reason that it continues to arouse the interest of scientists in view of the different applications that it may have, particularly in the spectral characterization of materials, spectroscopy, plasma physics and metrology. However, the line shape is generally asymmetrical and, in this case, the frequency of the Lamb dip does not coincide with the resonant frequency of the laser. It is essential, for a good standard, that these two frequencies . When this is the case, the line shape is symmetrical. For this, several models of laser cavities, called "stabilized cavities", have been proposed in the literature. These models are supposed to give rise to symmetrical lineshapes.

In this work, we revisit some of these models in order to highlight the limit of their validity and then, through an appropriate choice of the geometry of the cavity, a "stabilized" cavity model giving rise to a symmetrical lineshape will be proposed. such a cavity can serve as a good standard of frequencies and lengths

Biography:

Recently, there has been lot of development in the field of high-resolution FF-OCT which, provides the quantitative information based on morphology. We developed a high resolution automated full-field optical coherence tomographic system using LED light source. The FFOCT system is used to capture the high resolution amplitude images of normal and cancerous tissue Different morphological features were extracted and these features were used to train machine learning model to classify normal and cancerous tissue

Abstract:

Conventional optical coherence tomography system is based on point-by-point scanning which consumes more time for large volume acquisition and also suffers poor resolution (10 µm). In this study, we used low coherence full field optical coherence tomography (FFOCT) system based on Mirau interferometer, which provide 3D micron level resolution. The system is used for the quantification of normal and malignant breast tissue. Transverse cross-section (en-face, or XY) images can be obtained in real time with better than 2-microm axial (Z) resolution and 1.0-microm transverse (XY) resolution. 10 tissue samples (5 normal, 5 malignant) were imaged with the FFOCT system and six features were extracted by analyzing the 40 FFOCT images, based on the differences in the morphology of the normal and malignant tissue samples.  A k-nearest neighbor (k-nn) classifier was trained using 24 images, and sensitivity of 91.6 % and specificity of 83.33 % was obtained. The pathological structures were distinguished from the normal structure. The principle, experimental details and results for breast cancer analysis, and will be later presented.

Biography:

Natalia Nosidlak has complited her PhD in 2013 from Institute of Nuclear Physics Polish Academy of Sciences. In 2014, for six months, she worked at the AGH University of Science and Technology in Kraków at the Department of Electronics, then from October 2014 until today she works at the Institute of Physics at the Cracow University of Technology. She has published more than 10 papers in reputed journals.

Abstract:

In this work we present the results of the ellipsometric studies of thin films, that are part of the organic photovoltaic cell. The investigated cell, as the active layer, contains a traditional donor-acceptor structure in the form of a bulk-heterojunction (BHJ). The tested photovoltaic cell have the following structure: ITO/PEDOT:PSS/P3HT+PQ/Al. The active layer is a blend of the P3HT (Poly (3-hexylthiophene-2-diyl)) and a low molecular weight compound from the pyrazoloquinolines group marked as PQ (1,3-phenyl-6-fluorine-1H-pyrazolo[3,4-b]quinoline). The ITO layer, act as the hole collecting electrode. The PEDOT:PSS (Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) layer has been used  to smooth the ITO and facilitate the transport of holes. The presented layers have been tested using spectroscopic ellipsometry (SE) method.

The paper presents the results of our investigation that determined the spectral dispersion of optical constants in a wavelength range of 190-1700 nm by using SE technique.

The appropriate theoretical models have been fitted to the results of the SE measurements, which allowed to determine the thickness of the layers and the dispersion relation of refractive and extinction indices.Furthermore, we are showing here the temperature dependence of refractive indices of polythiophene films for a heating and a cooling process in a temperature range of 25-110°C. Additionally, thermo-optic coefficients and an optical gap were established and presented in the paper, followed by a discussion on the conditions of thermal stability of presented layers and reversibility issues in thermal processes.

Biography:

Bozena Burtan Gwizdała has complited her PhD in 2013 from Instytute of Nuclear Physics Polish Academy of Science. From October 2014 until today she works at the Instytute of Physics at the Cracow University of Technology. She has published more than 24 papers in reputed journals.

Abstract:

We have investigated the spectroscopic properties of Er³⁺-doped fluorotellurite glasses with the basic molar composition 75%TeO₂-10%P₂O₅-10%ZnO-5%PbF₂, modified by replacing 5%TeO₂ by metal oxides. The thermal stability of fluorotellurite glasses was improved by the incorporation of other components in the glass matrix. Upon 980 nm excitation, intense luminescence emission around 1,5 mm was observed. It appears that the quantum efficiency of the ⁴I_13/2 / ⁴I_15/2 transition is quite high. The absorption and fluorescence spectra have been analyzed in terms of the standard Judd–Ofelt theory along with the photoluminescence decay of the ⁴I_13/2 and ⁴S_3/2 levels of the Er³⁺ ion. The absorption and emission spectra of the ⁴I_15/2 ↔ ⁴I_13/2 infrared transition have been analyzed within the McCumber theory to yield the peak emission cross-section and figure of merit (FOM) for the amplifier gain. A new simple method to calculate the mean transition energy of the McCumber approach as the arithmetic average of the barycenter wavelengths of absorption and emission spectra was presented.

Biography:

Abstract:

ZnSe layers were grown on ZnO substrates by metal organic chemical vapor deposition technique (MOCVD). ZnO, ZnSe and ZnO/ZnSe heterostructure were investigated by Raman spectroscopy and absorption.

From the absorption spectra, we deduced the type II character of the ZnSe/ZnO heterostructure. Type II structures are very useful in photovoltaic conversion.

Biography:

Philip chidiebere ihenacho is a physicist who has over 12 of experience in physics science. He was born and educated in nigeria. As a physicist, he has shared so many ideas around the world with a lot of scientist, mathematicians and logicians. The likes of mishra basudeba from india and sigurd vojnov are few of his collaborators. He has shared of his ideas in form of lectures and seminars at Godfrey okoye university in nigeria and Enugu state university of science and technology(ESUT) about the impossibilities of teleportations of matter in space-time and deeper realisation of maxwell equations and has pioneered a lot of young physicist and promising people in nigeria as a whole. He has worked briefly with blue oxygen technologies limited as a consultant and researcher for three years, before moving to quickeninggroup limited as a researcher. Currently, he is working on the unifications of quantum mechanics and general relativity on his paper entitled PERFECT THEORY ON THE NATURE OF ELECTRONS a supposed paper that treatted energy, space-time and matter(specifically electron).

Abstract:

In the ideas that arose from relativity, the proposition that matter and energy being the same through the equation E=mc2, the recallation also that ER=mc2 and K.E =ymc2(y=1-v2/c2) and E=square root mc2/1-v2/c2 is the portration that matter and energy is the same. Looking on the previous equations, which of the two is the originator of the other? i.e matter or energy? In all accountability, relativistic theory seems complete, for it appears that a particle that has mass (kg) appears not to attain speed(3.0x10*8) close to that of light because of increase in mass. But at the same time, the supposed nature of elementary particle like electron seems to have a unified nature with the constant 3.0x10*8 which is generally accepted as light speed. But before enthusiastically accepting any new theory, some questions should come into the mind of the acceptor

Biography:

Philip chidiebere ihenacho is a physicist who has over 12 of experience in physics science. He was born and educated in nigeria. As a physicist, he has shared so many ideas around the world with a lot of scientist, mathematicians and logicians. The likes of mishra basudeba from india and sigurd vojnov are few of his collaborators. He has shared of his ideas in form of lectures and seminars at Godfrey okoye university in nigeria and Enugu state university of science and technology(ESUT) about the impossibilities of teleportations of matter in space-time and deeper realisation of maxwell equations and has pioneered a lot of young physicist and promising people in nigeria as a whole. He has worked briefly with blue oxygen technologies limited as a consultant and researcher for three years, before moving to quickeninggroup limited as a researcher. Currently, he is working on the unifications of quantum mechanics and general relativity on his paper entitled PERFECT THEORY ON THE NATURE OF ELECTRONS a supposed paper that treatted energy, space-time and matter(specifically electron).

Abstract:

In the ideas that arose from relativity, the proposition that matter and energy being the same through the equation E=mc2, the recallation also that ER=mc2 and K.E =ymc2(y=1-v2/c2) and E=square root mc2/1-v2/c2 is the portration that matter and energy is the same. Looking on the previous equations, which of the two is the originator of the other? i.e matter or energy? In all accountability, relativistic theory seems complete, for it appears that a particle that has mass (kg) appears not to attain speed(3.0x10*8) close to that of light because of increase in mass. But at the same time, the supposed nature of elementary particle like electron seems to have a unified nature with the constant 3.0x10*8 which is generally accepted as light speed. But before enthusiastically accepting any new theory, some questions should come into the mind of the acceptor

Biography:

Iñaki Aporta Litago received the degree in telecommunication engineering from the University of Cantabria, Spain, in 2014. Since then, he has been working toward the Ph.D. degree at the Photonics Engineering Group (GIF), Department of electronic Technology Industrial Automation and System Engineering. His main research is on Fiber lasers: random distributed feedback lasers, ultrafast pulsed lasers and its applications.

Abstract:

A broadband tunable pulsed fiber laser for parametric generation in PCF applied to CARS microscopy is presented. The experimental set-up of the ytterbium-based oscillator. The laser (seed) emitts a stable pulsed signal in a 40 nm range as is depicted in when the pump reaches the threshold of 73 mW. This source has an output power which varies between 1.5 to 3.5 mW (depending on the wavelength emission), a repetition rate of 3.5 MHz, a 3-dB spectral width of 80 pm and a pulse duration of 25 ps. Furthermore, the laser structure allows self-started mode-locking at any wavelength in the whole tuning range and the continous tunability of the wavelength emission with no need of polarization control. Due to the source capability of being tuned with a precision of 0.01 nm and that is free of polarization control thanks to the use of a slow-axis in-line polarizer, the laser source becomes ideal for optical parametric generation in PCF through Four-Wave Mixing (FWM). This non-linear process allows generating the Anti-Stokes component, which implies a frequency difference with the seed that matches with a concrete CARS resonance. This way, owing to the wavelength tunability of the source, the desired frequency difference could be precisely adjusted to match  the CARS resonance of interest. Moreover, this laser structre is well-suited for communication, sensing and non-linear applications .