Day 1 :
Russian Academy of Sciences, Moscow, Russia
Time : 11:00-11:45
Apollonov V V is the leading specialist in the area of basic principles of creation and development of high power laser systems and high power laser radiationrninteraction with matter. He has made an outstanding input into creation and development of new branches of science - physical and technical fundamentals of high rnpower laser optics and adaptive optics, investigation of physical processes in a high volume self-controlled volume discharges, creation of high power continuousrnwave, pulsed and high repetition rate pulse-periodic laser systems, high intensity laser radiation interaction with matter, high power laser application for an effectivernprotection of valuable objects and water surface cleaning from oil films, medical applications for UV lasers. He is the author of more than 1160 publications, 14rnbooks, 350 presentations and 144 patents. (from Research Gate). He is a high profile scientist and well known around all over the world, for more than 40 years ofrnhis international scientific activity, he has participated and organized more than 56 international conferences, symposiums and workshops, prepared more than 32rncandidates and doctors of physics and mathematics. He is the General Director of “Energomashtechnika” Ltd. He is the member of European and American PhysicalrnSociety, SPIE, AIAA, American Society for QE and the member of specialized scientific council of Russia. He is a full member of Russian Academy of Natural Sciencernand Academy of Engineering Sciences, member of the Presidium RANS. He is the laureate of State Prize of USSR (1982) and of Russia (2002).
Theoretical and experimental problems of high power high repetition rate pulse-periodical laser development will be presented in the talk. New challenges for high power high repetition rate pulse-periodical lasers and very important new areas of application will be highlighted. Important advantages of the scalable mono-module disk geometry will be discussed.
University of Central Florida, USA
Keynote: Ultrabroadband mid-IR frequency combs for sensitive molecular detection: frequency-divide-and-conquer approach
Time : 11:45-12:30
Konstantin L. Vodopyanov obtained his MS degree from Moscow Institute of Physics and Technology (Phys-Tech) and accomplished his PhD and DSc (Habilitation) in the Oscillations Lab. of Lebedev Physical Inst. and General Physics Inst. correspondingly. He was an assistant professor at Moscow Phys-Tech (1985-90), Alexander-von-Humboldt Fellow at the University of Bayreuth, Germany (1990-92), and a Royal Society postdoctoral fellow and lecturer at Imperial College, London, UK (1992-98). After working for 5 years in laser industry he returned to Academia (Stanford University, 2003-2013) and is now a Chair Professor of Optics at CREOL, College of Optics & Photonics, Univ. Central Florida. Dr. Vodopyanov is a Fellow of APS, OSA, SPIE, and the UK Institute of Physics (IOP). He has > 325 technical publications and is member of program committees for several major laser conferences including CLEO (most recent, General Chair in 2010) and Photonics West (Conference Chair). His research interests include nonlinear optics, laser spectroscopy, mid-IR and terahertz-wave generation, ultra broadband frequency combs and their biomedical applications.
I will present a new technique for extending frequency combs to the highly desirable mid-IR ‘molecular fingerprint’ spectral range. The technique is based on subharmonic optical parametric oscillation (OPO) in quasi-phase-matched GaAs crystal. This process can be considered as a reverse of the second harmonic generation: the frequency comb of a pump laser (Tm-fiber 2-µm laser or Cr:ZnS 2.4-µm laser) is transposed to half of its central frequency and simultaneously spectrally augmented to more than an octave, thanks to the enormous gain bandwidth near OPO degeneracy and cross-coupling between the laser and the OPO frequency comb lines. With this source we demonstrate massively-parallel trace detection of molecular mixtures and achieve part-per-billion sensitivity levels. Our present focus is both biomedical and security applications of mid-IR spectral combs.
- Track 8 : Laser in Medicine Track: 9 Laser In Industry Track : 5 Optoelectronic Devices and Materials Track 6 : Power Electronics
Victor V Apollonov
Russian Academy of Sciences, Russia
University of Central Florida, USA
Time : 13:30-14:10
Aravinda Kar received his PhD degree from the University of Illinois at Urbana-Champaign and is an Associate Professor of Optics, MMAE (Mechanical, Materials and Aerospace Engineering) and Physics at UCF. His research interest is Laser Advanced Materials Processing such as (1) Materials processing, synthesis and modeling, (2) Device structure fabrication and prototyping, (3) Laser-assisted manufacturing and micromachining and (4) Advanced manufacturing thermal science (Thermofluids analysis of manufacturing technology.
Hyperthermia involves exposing body tissue to high temperatures (up to 113°F) to destroy cancer cells. Common methods to deliver heat include the heating of probes or needles using external microwave, radiofrequency (RF) wave or ultrasound sources. The objective of this work is to develop a metallic probe or needle that is comprised of two sections – a tip section to be inserted in a tumor, that subsequently heats up due to induced Eddy currents when exposed to a fluctuating RF magnetic field (as in those used in current Magnetic Resonance Imaging (MRI) systems); and a body section away from the tip with reduced heating to minimize damage to the normal surrounding tissue. Such a metallic probe offers superior maneuverability for placement in a tumor (due to the higher stiffness of metals) while offering real time imaging during treatment (since the energy source is an MRI system). While tip heating in MRI systems is well known and has been actively researched, the emphasis here was to reduce interaction of the body of the probe with the fluctuating RF magnetic field in the MRI system thereby reducing heating. This was accomplished by laser assisted diffusion of Ag, Au and Pt in to MP35N wires. The performance of these laser treated MP35N wires were evaluated in a RF magnetic field and are reported here. The results are presented along with predictions from a model developed as part of this work to capture the physics of the heating (or lack thereof) of the laser treated wire body in the fluctuating RF magnetic field of the MRI system.
Wakayama University, Japan
Title: White light emission from solid carbon in water during hydrogen generation by VIS nanosecond laser pulse irradiation
Time : 14:10-14:50
Akimoto has given her PhD from Kyoto University in 2002. She takes responsibility for one research group in Department of Material Science and Chemistry at Wakayama University. She is a member of the Physical Society of Japan, the Japan Society of Applied Physics, and the Society of Electron Spin Science and Technology in Japan. She has wide research backgrounds by using laser light about optical properties of materials from semiconductors to organic phosphors.
We found a novel method of hydrogen generation from a mixture of water and solid carbon by visible nanosecond laser pulse irradiation at room temperature and under ambient atmosphere. The generated gas contains roughly 50% of hydrogen and 20% of carbon monoxide, meaning that the carbon was oxidized by the laser irradiation. Speed of the gas generation was improved by ethanol addition. We tentatively attributed the gas generation mechanism to photochemical reactions of the solid carbon with water, in analogy to the classical coal gasification which usually progress under high pressure and high temperature (HPHT). It has been unclear, however, whether the HPHT condition was achieved at the site and the moment of laser pulse irradiation or not. According to the nonlinear laser power dependence of generated gas volume and pulse width dependence, we have supposed that the photochemical reactions occur by multi-photon absorption and sequential excitation in carbon material in nanosecond duration. In this presentation, we focus on the spectroscopic phenomenon during the hydrogen generation. Optical emission of continuous spectrum was observed over visible range in both sides of the excitation wavelength for excitation power over a threshold. We discuss a possibility of non-equilibrium temperature elevation.
Dong-A University, Republic of Korea
Time : 14:50-15:20
Suk-Ju Kang received a BS degree in electronic engineering from Sogang University, Rep. of Korea, in 2006 and a PhD degree in electrical and computer engineering from Pohang University of Science and Technology, Rep. of Korea, in 2011. He was a senior researcher at LG Display, Rep. of Korea, from 2011 to 2012. He is currently an Assistant Professor of Electrical Engineering at the Dong-A University, Busan, Rep. of Korea. His current research interests include image analysis and enhancement, video processing, multimedia signal processing, circuit design for display and multimedia systems, robot vision system, and LED control systems.
Light emitting diodes (LEDs) have been substituted with conventional lighting devices in applications that range from plant lights to consumer electronics. This is because they have various advantages including energy efficiency, long life time, and design flexibility. Recently, several algorithms for the LED power management have been studied for reducing the power further by using the internet of things (IoT) technology. Especially, LEDs for the plant light turn on all the time because of the intensive indoor cultivation, and hence the power management is the most important factor. This paper proposes a new intelligent LED brightness control system using the ultrasonic distance sensor. After the target brightness is determined, the ultrasonic distance sensor of the proposed algorithm measures a distance between the plant and the LED device in real time. In this case, the proposed algorithm uses the database, which is pre-defined for the optimal point between the brightness and the sensed distance, and generates the pulse width modulation signal for the output brightness. Therefore, the proposed algorithm can constantly maintain the brightness and greatly reduce the power even though the distance is changed. In the experimental result, the proposed algorithm reduced the power consumption by up to 9.8 W compared with the conventional algorithm when the target LED brightness is 100 lux and the distance is changed from 0.4 m to 1m
Surya Harikrishnan, M.Sc., B.Ed. has been involved in teaching Physics at Masters Level for the last ten years. She completed a Summer Research Fellowship Programme at University of Mumbai-Department of Atomic Energy-Centre for Excellence in Basic Sciences (UM-DAE-CEBS) and worked there for a year as a Fellow. From 2010 November she has been working as an Assistant Professor at the Department of Atomic and Molecular Physics, Manipal University. Her research interest is in the field of Archaeophotonics. She has already given a National and an International talk related to this topic and had presented a poster at the National Laser Symposium-22. A monograph authored by her on this topic is currently under review.
Photonics-the science of generation, manipulation and detection of light- has already established itself as the science of the 21st century, with a multitude of applications in a wide range of fields. One very important and relatively less-heard-of application is to use light-based techniques for the analysis of archaeological samples. The year 2015 being the International Year of Light, this illuminating application of photonics is highly relevant especially when light throws light on one’s past and heritage. While there are several scientific methods available for archaeological dating, very few techniques are known and applied for studies beyond dating. Photonics takes archaeological analysis one step further ahead of mere dating in it that it facilitates the compositional analysis of archaeological samples. There are spectroscopic techniques available to understand the chemical structure and bonds in the molecular species present in the sample, the fluorophores present if any and even the elemental composition up to the trace elemental level. All these aspect, clubbed with dating, will provide useful information like the mineral wealth, resources used, scientific expertise, technological advancement etc that prevailed at that time of the past. These light-based methods of analysis are extremely useful in studying artwork as well. The information on the chemical composition of old paintings is extremely useful in adopting appropriate methods of preparation and also to check forgery. A few pottery and stone and samples have been analysed here using Laser Induced Breakdown Spectroscopy (LIBS), Raman Spectroscopy, Laser Induced Fluorescence (LIF) seeking information about their origin and provenance and possible the method of making. The results of these studies will be presented.
Florida Southern College, USA
Time : 16:20-17:00
Ron completed his PhD at JILA and the University of Colorado at Boulder, where he studied Quantum Optics. His research interests include the dynamics of ultracold gases in optical lattices, as well as the dynamics of photons in coupled nonlinear cavities. He is currently an Assistant Professor of the Chemistry and Physics Department at Florida Southern College
An optical lattice is a periodic potential created by the interference of coherent light sources. Ultracold atoms can be inserted into these light crystals, which then dynamically tunnel around the structure. We demonstrate that, by tuning experimentally-accessible parameters of these systems, the transport characteristics of electronic components such as diodes and transistors can be realized. With these analogs of the fundamental building blocks of electronics, basic combinatorial logic gates, such as AND and OR gates can also be realized. These structures are interesting since their intrasystem dynamics are completely coherent. Thus, if an atom was prepared in a specific quantum state at one point in the system, that information will remain as the atom moves through the “atomtronic circuit”.
University of São Paulo, Brazil
Time : 17:00-17:20
Nádia Carolina Teixeira Marques graduated in Dentistry from Federal University of Alfenas – UNIFAL-MG. At the age of 24 years became MSc in Pediatric Dentistry at Bauru School of Dentistry, USP - University of São Paulo. Currently acts as PhD student from Bauru School of Dentistry, USP - University of São Paulo. She has published 10 papers in scientific journals, besides serving as periodic reviewer. Areas of Expertise: Pediatric dentistry; Pulp therapy; Laser Therapy.
The aim of this study was to evaluate the effects of Low-Level Laser therapy (LLLT) on dentin matrix protein-1 (DMP-1) expression in pulp tissue repair of human primary teeth. Twenty mandibular primary molars were allocated into the following groups: Buckley’s Formocresol (FC); Calcium Hydroxide (CH); LLLT + CH and LLLT + Zinc/Oxide Eugenol (ZOE), and received pulpotomy treatment. The teeth at the regular exfoliation period were extracted and further processed for histological evaluation and immunolocalization of DMP-1. An established score system was used to analyze the dentin pulp complex, and for the immunolocalization of the DMP-1 a descriptively analysis was carried out. Statistical analysis was performed by Kruskal-Wallis and chi-square test (p<0.05). LLLT+CH group presented the lowest degree of pulpal inflammation (p=0.0296) compared to FC group. The highest rate of hard tissue barrier (p=0.0033) and odontoblastic layer (p=0.0033) was present in CH group than in FC and LLLT+ZOE groups; furthermore, CH group showed higher rates for dense collagen fibers (p=0.0095) in comparison with both groups. In contrast with LLLT+ZOE and LLLT+CH groups, FC revealed the highest incidence of internal resorption (p=0.0142). Immunohistochemistry analysis showed DMP-1 immunopositivity in CH and LLLT+CH groups, indicating the reparative and bio-inductive capacity of these materials. No immunostaining for DMP-1 was observed both in FC and LLLT+ZOE groups. According to this study, Low-Level Laser Therapy preceding the use of calcium hydroxide exhibited satisfactory histological response and bio-inductive activity by the expression of DMP-1 on pulp tissue healing of human primary teeth.