Biography:

I3N  Institute of Nanostructures, Nanomodelling and Nanofabrication. Department of Physics, University of Aveiro,3810-193 Aveiro, Portugal

 

 

Abstract:

Mário 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. His research interests have been concerned with the modeling and characterization of multi-section semiconductor lasers for coherent systems, quantum well lasers, optical fiber amplifiers and lasers, soliton propagation, polarization and nonlinear effects in optical fibers. He is actually the leader of the Optics and Optoelectronics Group of the I3N – Institute of Nanostructures, Nanomodelling and Nanofabrication. He has written about 400 scientific journal and conference publications, and several books, namely: “Optics and Photonics” (Lidel, 2003, in Portuguese), “Topics of Mathematical Physics” (Editora Ciência Moderna, 2018, Brazil, in Portuguese), “Optical Fibers: Technology, Communications and recent Advances” (Ed., NOVA Science Publishers, 2017), and “Nonlinear Effects in Optical Fibers” (John Wiley & Sons, OSA, 2011). He was the Guest Editor of two Special Issues of “Fiber and Integrated Optics” (Taylor & Francis): “Fiber Optics in Portugal” (2005) and “Nonlinear Fiber Optics” (2015), and a Special Issue of “Fibers” (MDPI): “Optical Fiber Communications” (2018). Actually, he is Guest Editor of a Special Issue of “Applied Optics” and “Optics Express” (Optical Society of America): “Optical Sensors and Sensing 2019” (2019).

He is a member of the Optical Society of America (OSA), SPIE - The International Society for Optical Engineering, The New York Academy of Sciences (NYAS), the American Association for the Advancement of Science (AAAS), the European Optical Society (EOS), the European Physical Society (EPS) and the Portuguese Physical Society. He served in various committees of the Optical Society of America (OSA) and of SPIE – The International Society for Optics and Photonics, having been also a member of the Telecommunications Committee of the “International Association of Science and Technology for Development” (IASTED). He served also in the technical committees of various international conferences. He served as a reviewer of several scientific journals in the area of optics and optoelectronics. He is presently an Associate Editor of “Optical Fiber Technology- Materials, Devices, and Systems” (Elsevier) and a member of the Advisory Board of “Fiber and Integrated Optics” (Taylor & Francis), “Nonlinear Optics, Quantum Optics” (Old City Publishing, Inc.), and “International Journal of Optics” (Hindawi Publishing Corporation).

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). In his leisure time, he enjoys watching football, listening to music, watching movies and gazing the stars with his telescope.

Presenting author

Abstract:

introduced into the system or atom, the electrons seem to be stationary only transferring energy from one electron to the other and also because the mass and size of electron is small, it requires microscope to view it. So when one views a particular electron in the tube, we think we are viewing a particular electron but what we are seeing is the next electron and in reality what we are seeing is simply energy moving from one electron to the other inform of waves with a supposed speed of light (3.0x10*8). Since the speed of energy transfer from one electron to the other is fast enough (3.0x10*8), and electron being a point particle with a mass of 9.11x10'3, one could understand that the time it takes energy to pass through electron should be close to order of planck time and reaching 5 seconds more than dozens electrons has been penetrated. So because of the fastness of the light energy and size of electron(point), it shows that when we are looking at an electron we think we are looking at a particular one rather than more and this is so because electrons are fused together without a dot separation from each other and since electrons are fused, detection of a particular energy in electron seems difficult.

The difficulty in detecting a particular electron with energy on it occurs as follows:

1.The size of a single electron is too negligible to detect.

2.Since electrons appear to fuse together, detection of a particular electron with a   fast moving energy(3.0x10*8) at an instant of time seems difficult because electrons are identical with each other and one must always conclude that the electrons aremoving but they do not.

Biography:

Universite Tunis El Manar, Faculte des Sciences de Tunis,

Departement de Physique.

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:

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:

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:

Kavita Dubey, Electrical and Instrumentation Engineering Department, Thapar University Patiala ,The e-corresponding should be addressed:  *vishalsrivastava17@gamil.com

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:

Ahmed Aissani est actuellement Maitre de conférences à l’Université des Sciences et de la Technologie Houari Boumediene d’Alger (Algérie) et Maitre de recherche au Laboratoire d’Electronique Quantique, situé vau sein de la même université.  Il a obtenu ses diplômes de D.E.S (Diplôme des Etudes Supérieures) en « Physique du Solide », en 1982, à l’USTHB d’Alger, son DEA (Diplôme des Etudes Approfondies) en « Instrumentations et Mesures », en 1983, à l’université de Grenoble (France) et son Doctorat en « Physique des Lasers », en 1986, à l’université de Rennes (France). Entre 1986 et 1988, il a été enseignant chercheur à l’Ecole Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT) de Lannion (France). Depuis, il enseigne et encadre des étudiants en Master et en Doctorat à l’université d’Alger

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:

My goal is to promote the science of laser medicine for the health of the people of the world.

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 medicine research and treatment . I am eager to learn and study further . I have an intense internal drive 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.when I face new issues,I look at it and think, ‘that seems interesting, that could be an area I could make a contribution in,maybe I can make a difference’ then I invest myself in it,” “I take my time and life to do it, I encounter challenges and make my way through it.I choose University due to the chance that has given to me with its superb reseach expertise.Reasearch is my passion. But, unfortunately, I am not supported in my country and I am looking for an active scholarship and group to advance the goals.

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.

1. 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

2. 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.

3. Application of laser in lowering blood pressure: Using low-level lasers can be treated intraarticular and topically in the process of reducing blood pressure.

4. 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 is important in patients with over-the-counter It will play an important role.

5. Laser application in the treatment of depression: This method will be performed using appropriate light and energy

6-Application of Lasers in Acupuncture: Using a low-power laser and appropriate acupuncture points, we can treat the following illnesses.

1 - Obesity 2 - Depression 3 - Impotence - Muscle pain 5 - Paralysis

7. Application of laser in preventing ulcers in chemotherapy patients

8. Application of laser in wound healing of diabetic people

9-Laser application in the treatment of fungus nails with specific color and appropriate laser length

10. Making laser machine for diagnosis as soon as possible

All of these projects will be an important contribution to the recovery of patients and will promote the development of laser medical science. I now need research opportunities and scholarships.

Biography:

Inaki 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 Fig.1 shows 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 Fig. 2, 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