62 Works

Microsurgery of Cell Membrane with Femtosecond Laser Pulses for Cell Fusion and Optical Injection

Ilina, I.V.; Joint Institute For High Temperatures Of The Russian Academy Of Sciences, Izhorskaya Str., 13-2, Moscow, 125412, Russian Federation, Chefonov, O.V.; Joint Institute For High Temperatures Of The Russian Academy Of Sciences, Izhorskaya Str., 13-2, Moscow, 125412, Russian Federation, Agranat, M.B.; Joint Institute For High Temperatures Of The Russian Academy Of Sciences, Izhorskaya Str., 13-2, Moscow, 125412, Russian Federation, Khramova, Yu.V.; M.V. Lomonosov Moscow State University, Biological Faculty, Leninskie Gory, 1-12, Moscow, 119234, Russian Federation, Ovchinnikov, A.V.; Joint Institute For High Temperatures Of The Russian Academy Of Sciences, Izhorskaya Str., 13-2, Moscow, 125412, Russian Federation, Sitnikov, D.S.; Joint Institute For High Temperatures Of The Russian Academy Of Sciences, Izhorskaya Str., 13-2, Moscow, 125412, Russian Federation & Semenova, M.L.; M.V. Lomonosov Moscow State University, Biological Faculty, Leninskie Gory, 1-12, Moscow, 119234, Russian Federation
We report on results of using femtosecond laserscalpel for microsurgery of plasma membrane ofliving cells. Femtosecond laser pulses were appliedto initiate cell fusion as well as to performreversible permeabilization of cell membranerequired for efficient injection of extrinsicsubstances into the target cells. Laser-based cellfusion of mammalian embryo blastomeres as wellas fusion of cell bodies of neurons of molluskLymnaea stagnalis were successfully carried out byapplying single femtosecond laser pulses (secondharmonic of a Cr:Forsterite laser system) 620 nm,100...

Creation of metal materials nanoporous structures under the action of laser radiation

Murzin, S.P.; S.P. Korolyov Samara State Aerospace University, Moskovskoye Shosse, 34, Samara, 443086, Russian Federation & Kazanskiy, N.L.; Image Processing Systems Institute Of The RAS, St. Molodogvardeyskaya, 151, Samara, 443001, Russian Federation
The laser radiation exposure for creation ofnanoporous structures in the Cu-Zn alloy wasstudied. Exposure to laser pulse-periodic radiationwith pulse repetition rate up to 5000 Hz makes itpossible to form a nanoporous structure in the nearsurfacelayer. The modes of an increase of the areadepth of such structures formation up to 40...45 μmwere ascertained. The temperature and speed modeswhich provide predominant channel-type nanoporesformation with widths of about 100 nm forming ananoporous net were investigated.

Enhancement of the Raman Scattering and the Third-Harmonic Generation in Silicon Nanowires

Sivakov, V.A.; D.V. Skobeltsyn Nuclear Physics Institute, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Osminkina, L.A.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Marshov, V.S.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Bunkov, K.V.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Petrov, D.V.; D.V. Skobeltsyn Nuclear Physics Institute, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Gonchar, K.A.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia, Golovan, L.A.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia NRC ‘Kurchatov Institute’, Moscow, 123182, Russia, Kulmas, M.N.; Institut Für Photonische Technologien, Jena, D-07745, Germany & Timoshenko, V.Yu.; Physics Department, M.V. Lomonosov Moscow State University, Moscow, 199991, Russia
We studied features of Raman scattering and the third-harmonic generation in silicon nanowire (SiNW) ensembles formed by means of chemical etching of crystalline silicon (c-Si) wafers with preliminary deposited silver nanoparticles in hydrofluoric acid. The c-Si wafers of different crystallographic orientations and doping levels were used, which results in variations of the formed nanostructure size and degree of order. For the excitation at 1064 nm the ratio of Raman scattering signals for SiNWs and those...

Fluorescent properties of the kindling fluorescent protein (KFP) at acidic pH values

Nemukhin, A.V.; M.V. Lomonosov Moscow State University, Department Of Chemistry, 119991, Moscow, Russia, Goryashchenko, A.S.; A.N. Bach Institute Of Biochemistry, Moscow, 119071, Russia, Mironov, V.A.; M.V. Lomonosov Moscow State University, Department Of Chemistry, 119991, Moscow, Russia, Savitsky, A.P.; A.N. Bach Institute Of Biochemistry, Moscow, 119071, Russia & Rusanov, A.L.; A.N. Bach Institute Of Biochemistry, Moscow, 119071, Russia
Kindling fluorescent protein (KFP) is the photoswitchable protein which can be used in high-resolution microscopy and as a quencher in FRET-sensors. Fluorescent properties of KFP depend on pH value. In this paper we investigate the influence of pH on the spectral properties and kindling/quenching ability of KFP in the acidic pH region.Shift to the acidic region leads to the increase of fluorescence intensity of KFP over time. The excitation spectrum has a new peak near...

Powder technology and innovative fiber design enabling a new generation of high-power single-mode-fiber laser sources

Benoit, A.; Xlim, UMR CNRS 7252, University Of LIMOGES, 123 Avenue Albert Thomas, 87060 Limoges, France EOLITE Systems, Cité De La Photonique, F-33600 Pessac, France, Salin, F.; EOLITE Systems, Cité De La Photonique, F-33600 Pessac, France, Dauliat, R.; Xlim, UMR CNRS 7252, University Of LIMOGES, 123 Avenue Albert Thomas, 87060 Limoges, France, Roy, P.; Xlim, UMR CNRS 7252, University Of LIMOGES, 123 Avenue Albert Thomas, 87060 Limoges, France, Valette, S.; SPCTS UMR CNRS 7315, European Ceramic Center, 12 Rue Atlantis, 87068 Limoges, France, Gaponov, D.; Xlim, UMR CNRS 7252, University Of LIMOGES, 123 Avenue Albert Thomas, 87060 Limoges, France, Schuster, K.; IPHT, Institute Of Photonic Technology, Albert-Einstein-Str. 9, 07743 Jena, Germany, Jamier, R.; Xlim, UMR CNRS 7252, University Of LIMOGES, 123 Avenue Albert Thomas, 87060 Limoges, France & Grimm, S.; IPHT, Institute Of Photonic Technology, Albert-Einstein-Str. 9, 07743 Jena, Germany
By simultaneously providing ultra large mode effective area (ULMA) and close to diffraction limited laser beams, Yb-doped double-clad photonic crystal fibers have become key components for power scaling in fiber laser systems. Despite their advantages, such fibers suffer from some drawbacks among which tremendous fabrication complexity and arising costs, high bending losses and poor integrability. In this paper, we show how the REPUSIL technique, which is an alternate synthesis method to produce high-quality doped-silica, enables...

Nanostructure Formation of the Solid Surface under the Action of Intense Laser Radiation

Urlichich, Yu.M.; Joint Stock Company "Russian Space Systems",53, Aviamotornaya St., Moscow 111250, Russia, Shmakov, V.A.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov St., Moscow 119991, Russia, Mikolutskiy, S.I.; Institute For Electrophysics And Electric Power RAS, 18, Dvorzovaya Nab., Sankt-Peterburg 191186, Russia & Khomich, V.Yu.; Institute For Electrophysics And Electric Power RAS, 18, Dvorzovaya Nab., Sankt-Peterburg 191186, Russia
The paper describes the mechanism for formationof periodic nanostructures on the surface of solidsunder the action of intense laser radiation. Themodel based on a nonlinear relaxation oftemperature-induced stresses. The solid deformedby laser radiation is considered in a form of threesimultaneously coexisting phases. The system ofequations, which describes these phases, is reducedto the generalized Ginzburg–Landau equation thathas a periodic solution. For estimation thecalculation of the step of the periodic structurearising on the silicon surface under the...

Selective Ablation in Cu(In,Ga)Se2 thin-film solar cells – analysis of different process regimes at sub-picosecond to nanosecond pulse duration.

Muralt, M.; Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Nishiwaki, S.; Laboratory For Thin Films And Photovoltaics, EMPA, Swiss Federal Laboratories For Materials Science And Technology, Überlandstrasse 129, CH-8600 Dübendorf, Witte, R.; Solneva SA, Swiss Solar Tools, Alte Lyssstrasse 2, CH-3270 Aarberg, Frei, B.; Solneva SA, Swiss Solar Tools, Alte Lyssstrasse 2, CH-3270 Aarberg, Romano, V.; Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Burn, A.; Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, +41 34 426 4141 & Buecheler, S.; Laboratory For Thin Films And Photovoltaics, EMPA, Swiss Federal Laboratories For Materials Science And Technology, Überlandstrasse 129, CH-8600 Dübendorf
Recent achievements in Cu(In,Ga)Se2 (CIGS) thin film technology allow the industrial production ofhighly efficient solar modules. A large growth of the CIGS-based solar cell production volume can beexpected for the coming years thanks to some favorable properties inherent to this absorber type. A majordrawback of CIGS is the inefficient patterning process. Since CIGS is a particularly difficult material forlaser ablation there is still no industrial all-laser scribing solution available. Manufacturers fall back onmechanical needle scribing...

Observation of Thermocapillary Effect in Gas -Assisted CO2 Laser Cutting of Steel

Dubrov, A.V.; Institute On Laser And Information Technology Of Russia Academy Of Science -ILIT RAS 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700 Russia, Zavalov, Y.N.; Institute On Laser And Information Technology Of Russia Academy Of Science -ILIT RAS 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700 Russia & Dubrov, V.D.; Institute On Laser And Information Technology Of Russia Academy Of Science -ILIT RAS 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700 Russia
Investigations of melt’s dynamics have been performed with pyrometer in the gasjet-assisted CO2 laser cutting. Pyrometer consists of 4 sensors and local luminosity of metal melt has been measured precisely on different depth along front of cutting with long dimension resolution about 0.1 mm and with time resolution as short as 0.06 ms. The results of data processing of brightness temperature are reported for laser cutting of mild-steel plate 3 mm, 6 mm and 10...

Nanostructure Formation on Solid Surfaces melted by Laser Pulse

Mikolutskiy, S.I.; Institute For Electrophysics And Electric Power RAS, 18, Dvorzovaya Nab., Sankt-Peterburg 191186, Russia, Urlichich, Yu.M.; Joint Stock Company "Russian Space Systems",53, Aviamotornaya St., Moscow 111250, Russia, Tokarev, V.N.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov St., Moscow 119991, Russia, Shmakov, V.A.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov St., Moscow 119991, Russia, Khomich, V.Yu.; Institute For Electrophysics And Electric Power RAS, 18, Dvorzovaya Nab., Sankt-Peterburg 191186, Russia & Yamschikov, V.A.; Institute For Electrophysics And Electric Power RAS, 18, Dvorzovaya Nab., Sankt-Peterburg 191186, Russia
The paper describes the model of nanostructureformation on solid surface by nanosecond laserpulses melting the material. Stefan problem withcorresponding boundary conditions is solved incombination with nucleation theory. It is found thattypical size of surface nanostructure formeddepends on energy and duration of laser pulse. Forcomparison of theoretic and experimental resultsvarious industry material (germanium, titanium,zirconia dioxide) pieces irradiated by ArF-laser areshown.

Influence of the pre-treatment of glass substrates on Laser-Induced Backside Wet Etching using NIR Nanosecond-Pulses and Cu-based solutions

Von Arx, U.; Department Architecture, Wood And Civil Engineering, Bern University Of Applied Sciences, Solothurnstrasse 102, CH-2500 Biel, Zehnder, S.; Institute For Applied Laser, Photonics And Surface Technologies, Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Neuenschwander, B.; Institute For Applied Laser, Photonics And Surface Technologies, Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf & Schwaller, P.; Institute For Applied Laser, Photonics And Surface Technologies, Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf
Laser induced backside wet etching (LIBWE) has shown to be a promising tool for the micro-structuring of transparent materials. Our group has investigated LIBWE using NIR ns-laser pulses and Cu-based absorber liquids. Focus of this paper is to investigate the influence of the pre-treatment of the transparent substrate on ablation. For this purpose experiments were done on untreated and silanized soda lime glass surfaces. Our results show that depending on the absorber liquid the silanization...

Supercontinuum Generation over 2 µm

Kamynin, V.A.; General Physics Institute, Moscow, Russian Federation, 11933, Sadovnikova, Ya.E.; Moscow State University Of Instrument Engineering And Computer Science, Moscow, Russian Federation, 142200, Kurkov, A.S.; General Physics Institute, Moscow, Russian Federation, 11933 & Tsvetkov, V.B.; General Physics Institute, Moscow, Russian Federation, 11933
Effective supercontinuum generation in fiber mediain spectral range over 2 μm was experimentallydemonstrated. Supercontinuum generation wasobserved in passive optical fibers. Maximumspectral broadening was obtained in germaniumdopedfibers with longest wavelength near 2.7 μm.To provide high spectral density we used opticalfiber amplifiers. Thus supercontinuum generationwas obtained in holmium optical fiber amplifiersmedium with spectral density 10 W/nm, in therange from 2 to 2.5 μm. In thulium fiber amplifiersobserved amplification not only in conventionalrange near 1.8 μm, but in...

UV Picosecond-Laser Induced Bulk Modifications and Luminescence in Single-Crystal Diamond

I.I. Vlasov, Khomich, A.A.; Natural Sciences Center, Prokhorov General Physics Institute, Moscow 119991, Russia, Pimenov, S.M.; Natural Sciences Center, Prokhorov General Physics Institute, Moscow 119991, Russia, Zavedeev, E.V.; Natural Sciences Center, Prokhorov General Physics Institute, Moscow 119991, Russia, Jäggi, B.; Bern University Of Applied Sciences, Engineering & Information Technology, Burgdorf CH-3400, Switzerland, Neuenschwander, B.; Bern University Of Applied Sciences, Engineering & Information Technology, Burgdorf CH-3400, Switzerland & Romano, V.; Bern University Of Applied Sciences, Engineering & Information Technology, Burgdorf CH-3400, Switzerland
Bulk laser-graphitized microstructures have been fabricated in type IIa single-crystal 1.2-mm-thick diamond plates by UV laser irradiation with 10-ps pulses at λ=355 nm wavelength. It is found that the crystallographic-plane-dependent character of structural modifications in the bulk is influenced by the laser wavelength and the direction of the laser beam incidence relative to a given crystallographic direction (<100> or <110>) in the diamond plates. High-order Stokes Raman lasing is observed during UV laser irradiation and...

A Study on the Vibration Characteristics of CFRP Composite Materials using Time-Average ESPI

Cho, C.-W.; DACC Co., 2-824 Palbok-Dong, Deokjin-Gu, Jeonju-Si, Jeollabuk-Do, 561-844 Republic Of Korea, Kim, S.-J.; Chonbuk National Uni., 567 Baekje-Daero, Deokjin-Gu, Jeonju-Si, Jeollabuk-Do, 561-756 Republic Of Korea, Choi, I.-Y.; Chonbuk National Uni., 567 Baekje-Daero, Deokjin-Gu, Jeonju-Si, Jeollabuk-Do, 561-756 Republic Of Korea, Hong, K.-M.; Chonbuk National Uni., 567 Baekje-Daero, Deokjin-Gu, Jeonju-Si, Jeollabuk-Do, 561-756 Republic Of Korea, Park, J.-H.; DACC Co., 2-824 Palbok-Dong, Deokjin-Gu, Jeonju-Si, Jeollabuk-Do, 561-844 Republic Of Korea, Kang, Y.-J.; Chonbuk National Uni., 567 Baekje-Daero, Deokjin-Gu, Jeonju-Si, Jeollabuk-Do, 561-756 Republic Of Korea & Kim, A.; Chonbuk National Uni., 567 Baekje-Daero, Deokjin-Gu, Jeonju-Si, Jeollabuk-Do, 561-756 Republic Of Korea
The ESPI (Electronic Speckle PatternInterferometry) is a real-time, full-field, nondestructiveoptical measurement technique. In thisstudy, ESPI was proposed for the purpose ofvibration analysis for new and composite materials.Composite materials have various complicatedcharacteristics according to the materials,orientations, and the stacking sequences of the plyand boundary conditions. Therefore, it is difficult toanalyze composite materials. For efficient use ofcomposite materials in engineering applications thedynamic behavior (i.e., natural frequencies andnodal patterns) should be known. With the use ofTime-Average ESPI, one...

Laser-induced chemical liquid-phase deposition of copper on transparent substrates

Von Arx, U.; Department Architecture, Wood And Civil Engineering, Bern University Of Applied Sciences, Solothurnstrasse 102, CH-2500 Biel, Switzerland, Schwaller, P.; Institute For Applied Laser, Photonics And Surface Technologies, Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland, Neuenschwander, B.; Institute For Applied Laser, Photonics And Surface Technologies, Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland & Zehnder, S.; Institute For Applied Laser, Photonics And Surface Technologies, Bern University Of Applied Sciences, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland
Laser-induced chemical liquid phase deposition allows maskless manufacturing of metallic structures on the surface of dielectrics and is prospected to be a promising tool in the field of microelectronics and microfluidics. The aim of the work presented here is to combine this deposition method with a related micro-structuring method known as laser-induced backside wet etching. Fabricating both, microstructured surface structures and subsequent deposition of conducting patterns within the same setup would be an interesting tool...

The resonance fluorescence spectra of N two-level quantum systems located around the spherical nanoantenna

Pastukhov, V.M.; International Laser Center And Faculty Of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia, Zadkov, V.N.; International Laser Center And Faculty Of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia, Vladimirova, Yu.V.; International Laser Center And Faculty Of Physics, M.V. Lomonosov Moscow State University, Moscow 119991, Russia & Klimov, V.V.; P.N. Lebedev Physical Institute, Russian Academy Of Sciences, Leninsky Ave. 53, 119991 Moscow, Russia
Modification of the resonance fluorescence spec-trum of a two-level atom driving by a lasermonochromatic field in the close proximity of aplasmonic nanostructure (metal sphere) is studiedin detail. It is shown that one can control thisspectrum varying four key parameters: distancebetween the atom and the nanosphere, atom’s lo-cation around the nanosphere, the radius of thenanosphere, and polarization of the incident ra-diation. These parameters affect the local fieldenchancement, transition frequency shift and themodification of the radiative decay...

Raman structural study of random olefin copolymers

Nedorezova, P.M.; Semenov Institute Of Chemical Physics, Russian Academy Of Sciences, 4 Kosygin St., 119991 Moscow, Russia, Starchak, E.E.; Semenov Institute Of Chemical Physics, Russian Academy Of Sciences, 4 Kosygin St., 119991 Moscow, Russia, Kovalchuk, A.A.; Rice University, Department Of Chemistry, 6100 Main St., Houston TX 77005, USA, Novokshonova, L.A.; Semenov Institute Of Chemical Physics, Russian Academy Of Sciences, 4 Kosygin St., 119991 Moscow, Russia, Klyamkina, A.N.; Semenov Institute Of Chemical Physics, Russian Academy Of Sciences, 4 Kosygin St., 119991 Moscow, Russia, Guseva, M.A.; Topchiev Institute Of Petrochemical Synthesis, Russian Academy Of Sciences, 29 Leninsky Pr., 119991 Moscow, Russia, Zavgorodnev, Yu.V.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 38 Vavilov St., 119991 Moscow, Russia “MATI”-Tsiolkovsky Russian State Technological University, 3 Orshanskaya St., 121552 Moscow, Russia, Sagitova, E.A.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 38 Vavilov St., 119991 Moscow, Russia, Nikolaeva, G.Yu.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 38 Vavilov St., 119991 Moscow, Russia, Donfack, P.; Center Of Functional Materials And Nanomolecular Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany, Prokhorov, K.A.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 38 Vavilov St., 119991 Moscow, Russia, Shklyaruk, B.F.; Topchiev Institute Of Petrochemical Synthesis, Russian Academy Of Sciences, 29 Leninsky Pr., 119991 Moscow, Russia, Materny, A.; Center Of Functional Materials And Nanomolecular Science, Jacobs University Bremen, Campus Ring 1, 28759 Bremen, Germany, Ushakova, T.M.; Semenov Institute Of Chemical Physics, Russian Academy Of Sciences, 4 Kosygin St., 119991 Moscow, Russia & Pashinin, P.P.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 38 Vavilov St., 119991 Moscow, Russia
In this work we present Raman study of random copolymers of ethylene and propylene with a number of α-olefins, and investigation of the relationships between the spectral characteristics of the Raman lines and the copolymer structural properties. For both the copolymers we observed rapid decrease in the crystallinity and conformational order as the content of the incorporated monomer increases.

Generation and propagation of polarization singularities in second harmonic generation from the surface of the isotropic gyrotropic medium

Portavkin, N.N.; Faculty Of Physics And International Laser Center, Lomonosov Moscow State University, Moscow, 119991, Russia, Makarov, V.A.; Faculty Of Physics And International Laser Center, Lomonosov Moscow State University, Moscow, 119991, Russia, Perezhogin, I.A.; Faculty Of Physics And International Laser Center, Lomonosov Moscow State University, Moscow, 119991, Russia & Grigoriev, K.S.; Faculty Of Physics And International Laser Center, Lomonosov Moscow State University, Moscow, 119991, Russia
When proceeding to the oblique incidence from thenormal incidence geometry in surface secondharmonic generation, the symmetry of the problemand, thus, of the reflected signal beam breaks. Inthis case there can appear C-points in thetransversal section of the signal beam. Using theanalytical formulae obtained in previous works, westudied the conditions of appearance and thebehaviour of the C-points in reflected signal beam(in particular case of SHG), and also the way of theline-to-point singularity transformation.

20 th International Conference on Advanced Laser Technologies ALT’12: Foreword

Romano, V.; University Of Bern & Neuenschwander, B.; Bern University Of Applied Sciences
The ALT Conference series are focused on the recent achievements and advances in laser technology and laser applications in various areas. These series of conferences, held annually since 1993, were established by Nobel Prize laureate Alexander Prokhorov, director of the General Physics Institute of the Russian Academy of Sciences. Previous conferences were organized in Russia, Czech Republic, Germany, Greece, France, Italy, Romania, Switzerland, United Kingdom, China, Hungary, Finland, Turkey, The Netherlands and Bulgaria. The key...

All-Fiber Thulium-Doped Mode-Locked Lasers Based on the Nonlinear Amplifying Loop Mirror

Krylov, A.A.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Dianov, E.M.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Pozharov, A.S.; A.M. Prokhorov General Physics Institute Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Obraztsova, E.D.; A.M. Prokhorov General Physics Institute Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Kryukov, P.G.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Arutyunyan, N.R.; A.M. Prokhorov General Physics Institute Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia & Chernysheva, M.A.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia
We report on thulium-doped all-fiber lasers based on the nonlinear amplifying loop mirror and mode-locked by both a semiconductor saturable absorber (SESAM) and single-walled carbon nanotubes (SWCNT). An intracavity and external dispersion management was realized with the aid of a passive germanium-silicate fiber. SESAM mode-locked laser generates as short as 230-fs pulses with maximum average output power of 106 mW, corresponding to a 3.7 kW peak power and almost 2 nJ pulse energy. In contrast...

Multi-stage ytterbium fiber-amplifier seeded by a gain-switched laser diode

Burn, A.; Bern University Of Applied Sciences, ALPS, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland, Romano, V.; Institute Of Applied Physics, University Of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland Bern University Of Applied Sciences, ALPS, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland, Pilz, S.; Bern University Of Applied Sciences, ALPS, Pestalozzistrasse 20, CH-3400 Burgdorf, Switzerland & Ryser, M.; Institute Of Applied Physics, University Of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
We demonstrated all-fiber amplification of 11 ps pulses from a gain-switched laser diode at 1064 nm. The diode was driven at a repetition rate of 40 MHz and delivered 13 µW of fiber-coupled average output power. For the low output pulse energy of 325 fJ we have designed a multi-stage core pumped pre-amplifier in order to keep the contribution of undesired amplified spontaneous emission as low as possible. By using a novel time-domain approach for...

Photon-Correlation Spectroscopy in Albumin Water Solutions Containing Gadolinium Ions

Sergeeva, I.A.; MSU, Faculty Of Physics, Russia, 119991, Moscow, GSP-1, 1-2 Leninskiye Gory, Gibizova, V.V.; MSU, Faculty Of Physics, Russia, 119991, Moscow, GSP-1, 1-2 Leninskiye Gory, Zhang, Xioley; MSU, Faculty Of Physics, Russia, 119991, Moscow, GSP-1, 1-2 Leninskiye Gory, Petrova, G.P.; MSU, Faculty Of Physics, Russia, 119991, Moscow, GSP-1, 1-2 Leninskiye Gory & Fedorova, K.V.; MSU, Faculty Of Physics, Russia, 119991, Moscow, GSP-1, 1-2 Leninskiye Gory
Gadoteric acid and gadodiamide molecules havegadolinium-containing chelate structures that areused in magnetic resonance tomography (MRT). [1].Over the past two decades, they were considered safeand effective for medical imaging. However, recentresults indicate the presence of gadolinium in the skinand soft tissues in patients with renal insufficiency,even with the current hemodialysis [2]. Nephrogenicsystemic fibrosis (NSF), which was described in1997, is a recently discovered rare disease ofunknown etiology that affects patients with renalinsufficiency. The development of NSF was...

Explosive Boiling of Transparent Liquids on Absorbing Targets Heated by Short Laser Pulses

Stuchebrukhov, I.A.; A.M. Prokhorov General Physics Institute Of Russian Academy Of Sciences, 38, Vavilov Str., Moscow, 119991, Russian Federation, Pivovarov, P.A.; A.M. Prokhorov General Physics Institute Of Russian Academy Of Sciences, 38, Vavilov Str., Moscow, 119991, Russian Federation, Il’ichev, N.N.; A.M. Prokhorov General Physics Institute Of Russian Academy Of Sciences, 38, Vavilov Str., Moscow, 119991, Russian Federation, Bazhulin, A.P.; A.M. Prokhorov General Physics Institute Of Russian Academy Of Sciences, 38, Vavilov Str., Moscow, 119991, Russian Federation, Ivochkin, A.Yu.; A.M. Prokhorov General Physics Institute Of Russian Academy Of Sciences, 38, Vavilov Str., Moscow, 119991, Russian Federation & Samokhin, A.A.; A.M. Prokhorov General Physics Institute Of Russian Academy Of Sciences, 38, Vavilov Str., Moscow, 119991, Russian Federation
Explosive boiling induced by sub-nanosecond laser pulses is theoretically analyzed in the case of transparent liquids on metal targets. In this case the variation of boiling start times due to inhomogeneous distribution of laser intensity through the irradiation spot can be reduced up to laser pulse duration and registered explosive boiling pressure signals become less distorted. The results are compared with experimental investigations of photoacoustic (PA) signals induced in metal target under transparent liquid layer...

Boundary Condition Effect On Photoacoustic Response Of Absorbing Liquid To Modulation Of Laser Intensity

Ivochkin, A.Yu.; A.M. Prokhorov General Physics Institute Of Russian Academy Of Sciences, 38, Vavilov Str., Moscow, 119991, Russian Federation, Il’ichev, N.N.; A.M. Prokhorov General Physics Institute Of Russian Academy Of Sciences, 38, Vavilov Str., Moscow, 119991, Russian Federation, Samokhin, A.A.; A.M. Prokhorov General Physics Institute Of Russian Academy Of Sciences, 38, Vavilov Str., Moscow, 119991, Russian Federation & Gulyamova, E.S.; A.M. Prokhorov General Physics Institute Of Russian Academy Of Sciences, 38, Vavilov Str., Moscow, 119991, Russian Federation
The photoacoustic (PA) pressure response of the absorbing liquid (water, ethanol) with free and confined surface to laser pulse with modulated intensity is studied. Modulation amplitude of the PA signal demonstrates non-monotonous behavior during laser pulse action which can be explained as interference between thermo-acoustic and vaporization mechanisms of pressure generation. The phase behavior of modulated part of PA signal also gives important information on processes in the irradiated matter. Doppler photoacoustic monitoring (DPM) is...

Colour Sensor White Balance Influence on White-Light Interferometer Resolution

Lychagov, V.; Optics And Biophotonics Department, Saratov State University, 83 Astrakhanskaya, Saratov, Russia, Smirnov, I.; Optics And Biophotonics Department, Saratov State University, 83 Astrakhanskaya, Saratov, Russia, Ryabukho, V.; Optics And Biophotonics Department, Saratov State University, 83 Astrakhanskaya, Saratov, Russia Institute Of Precision Mechanics And Control Of Russian Academy Of Science, 24 Rabochaya, Saratov, Russia. & Kalyanov, A.; Optics And Biophotonics Department, Saratov State University, 83 Astrakhanskaya, Saratov, Russia
Impact of a sensor color balance on white-light fullfieldoptical coherence tomography (FF-OCT)resolution is investigated in the paper. Full width athalf magnitude (FWHM) of a coherence pulse wascalculated for various white balance (WB) settings.Simulated dependence of FWHM on WB of asensor and experimental data are shown in thepaper. The minimum interference pulse width canbe achieved by the proper color balance coefficientschoice. And in this case the pulse is narrower thaneither one registered by colour image sensor...

Electrical properties of ZnO:Al thin films fabricated by pulsed laser deposition method

Khramova, O.D.; Institute On Laser And Information Technologies Of The Russian Academy Of Sciences, 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700, Russia Av.Shor@Yandex.Ru, Zuev, D.A.; Institute On Laser And Information Technologies Of The Russian Academy Of Sciences, 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700, Russia Av.Shor@Yandex.Ru, Novodvorsky, O.A.; Institute On Laser And Information Technologies Of The Russian Academy Of Sciences, 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700, Russia Av.Shor@Yandex.Ru, Shorokhova, A.V.; Institute On Laser And Information Technologies Of The Russian Academy Of Sciences, 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700, Russia Av.Shor@Yandex.Ru & Lotin, A.A.; Institute On Laser And Information Technologies Of The Russian Academy Of Sciences, 1 Svyatoozerskaya St., Shatura, Moscow Region, 140700, Russia Av.Shor@Yandex.Ru
The possibility of the high quality AZO thin films fabrication by the PLD method using the second harmonic of the Q-switched YAG:Nd3+ laser is demonstrated. The investigations of dependence of the AZO thin films properties on the PLD conditions (concentration of Al in the target, buffer gas pressure) have been conducted. The optimum conditions of the ZnO:Al thin films deposition have been defined.

Registration Year

  • 2013
    62