62 Works

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...

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...

Broadband Superfluorescent Source Based on Bismuth-Doped GeO2-SiO2 Fiber

Riumkin, K.E.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia, Melkumov, M.A.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia, Shubin, A.V.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia, Dianov, E.M.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia, Bufetov, I.A.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia, Khopin, V.F.; Institute Of Chemistry Of High-Purity Substances, Russian Academy Of Sciences, 49 Tropinin Str., Nizhny Novgorod 603600, Russia, Firstov, S.V.; Fiber Optics Research Center, Russian Academy Of Sciences, 38 Vavilov Str., Moscow 119333, Russia & Gurianov, A.N.; Institute Of Chemistry Of High-Purity Substances, Russian Academy Of Sciences, 49 Tropinin Str., Nizhny Novgorod 603600, Russia
The first bismuth-doped superfluorescent fibersource operating at 1.44-μm was developed. Atpump power of 200 mW and pump wavelength of1310 nm, its output signal reaches 57 mW withspectrum width of 25 nm.

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...

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...

THz and Raman Spectroscopy in Steroid Chemistry

Nazarov, M.M.; Institute On Laser And Information Technologies Of The RAS, Shatura, Russia, Smirnova, I.N.; Institute On Laser And Information Technologies Of The RAS, Shatura, Russia, Shkurinov, A.P.; Faculty Of Physics And International Laser Center M.V.Lomonosov Moscow State University, Leninskie Gory, GSP-1, Moscow, 119991, Russia & Cherkasova, O.P.; Institute Of Laser Physics SB RAS, Lavrentyeva 13/3, Novosibirsk, 630090, Russia
The terahertz time-domain and Raman spectra of steroids in the region of 0.1-3.5 THz have been measured. Steroids have several intense and specific absorption features in the THz frequency region. The features are uniquely determined by a hormone structure. This allows us to analyze steroids in complex samples such as pharmaceuticals, foodstuffs and biological fluids, and in process of the pharmacological and chemical synthesis.

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.

Self-Q-switched Cr,Nd:ReVO4 (Re=Gd, Y) crystal lasers

Zhang, H.; State Key Laboratory Of Crystal Materials And Institute Of Crystal Materials, Shandong University, 250100 Jinan, China & Yu, H.; State Key Laboratory Of Crystal Materials And Institute Of Crystal Materials, Shandong University, 250100 Jinan, China Max-Born-Institute For Nonlinear Optics And Short Pulse Spectroscopy, 2A Max-Born-Str., D-12489 Berlin, Germany
Self-Q-switched Cr,Nd:ReVO4 (Re=Gd, Y) crystallasers are demonstrated. The spectroscopic and self-Q-switched laser properties of Cr,Nd:ReVO4 arestudied. Polarized absorption spectra weremeasured at room temperature, which showed thatthe absorption bands display polarization characterand an absorption band of Cr5+ ions at 1110 nmenables the crystals to be self-Q-switched lasermaterials. The maximum pulse energy are achievedto be 1.12 μJ with Re=Gd , and the shortest pulsewidth is 85.8 ns with Re=Y. The results show thatCr,Nd:ReVO4 crystals are new potential...

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

Beat Neuenschwander & Romano, Valerio; University Of Bern
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...

Measuring Optical Properties On Rough And Liquid Metal Surfaces

Neuenschwander, B.; Institute For Applied Laser, Photonics And Surface Technologies ALPS, Bern University Of Applied Sciences, Pestalozzistrasse 20, 3400 Burgdorf, Switzerland, Schmid, M.; Institute For Applied Laser, Photonics And Surface Technologies ALPS, Bern University Of Applied Sciences, Pestalozzistrasse 20, 3400 Burgdorf, Switzerland, Zehnder, S.; Institute For Applied Laser, Photonics And Surface Technologies ALPS, Bern University Of Applied Sciences, Pestalozzistrasse 20, 3400 Burgdorf, Switzerland, Schwaller, P.; Institute For Applied Laser, Photonics And Surface Technologies ALPS, Bern University Of Applied Sciences, Pestalozzistrasse 20, 3400 Burgdorf, Switzerland, Held, M.; Institute For Applied Laser, Photonics And Surface Technologies ALPS, Bern University Of Applied Sciences, Pestalozzistrasse 20, 3400 Burgdorf, Switzerland, Hunziker, U.; Institute For Applied Laser, Photonics And Surface Technologies ALPS, Bern University Of Applied Sciences, Pestalozzistrasse 20, 3400 Burgdorf, Switzerland & Zürcher, J.; Institute For Applied Laser, Photonics And Surface Technologies ALPS, Bern University Of Applied Sciences, Pestalozzistrasse 20, 3400 Burgdorf, Switzerland
For understanding and optimizing laser processing of metals and alloys the optical properties, especially the absorption of the work piece in function of the temperature up to the liquid phase have to be known [1]. There are several approaches to extend the Drude-Model [2] for optical properties of metal to temperature dependence [3, 4, 5]. However, a verification of these models is difficult due to the lack of sufficient experimental data. Even though measuring optical...

Growth peculiarities and non-linear properties of profiled doped strontium-barium niobate crystals

Zverev, P.G.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov Str., Moscow, 119991, Russia, Lykov, P.A.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov Str., Moscow, 119991, Russia, Dunaeva, E.E.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov Str., Moscow, 119991, Russia, Ivleva, L.I.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov Str., Moscow, 119991, Russia & Osiko, V.V.; A.M. Prokhorov General Physics Institute RAS, 38, Vavilov Str., Moscow, 119991, Russia
The nominally pure and doped with Ce, Cr, Co strontium-barium niobate crystals of SBN:61 were grown by modified Stepanov technique. The specific features of the technique were studied and growth conditions for obtaining the high homogeneous SBN crystals in bulk-profiled configuration were optimized. The photorefractive and non-linear properties of SBN pure and doped with Ce, Cr and Co were investigated. It was shown that SBN:Ce crystal is an excellent medium for high efficiency holographic information...

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...

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...

Pyrometric Monitoring of Gas-Assisted Cutting of Steel Using Fiber Laser

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
Measurements of the temperature in zone of action of laser radiation on the molten metal have been performed. The results are reported for different speed of cutting of mild-steel plate of 3 mm-thick with high-power fiber laser; oxygen was used as an assisted gas. Researches demonstrate that fluctuations of local temperature are related to unequal radiation absorption that associates with local deformations of surface of melt. Thus noise spectrum of those fluctuations reflects turbulent surface...

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...

Process Developments And Applications Around The Powder In Tube Technique

Schuster, K.; IPHT- Institut Für Photonische Technologien E.V., Albert-Einstein-Straße 9, 07702 Jena Germany, Leparmentier, S.; Xlim – Groupe “Fibres Optiques”, 123, Avenue Albert THOMAS 87060 Limoges Cedex, Litzkendorf, D.; IPHT- Institut Für Photonische Technologien E.V., Albert-Einstein-Straße 9, 07702 Jena Germany, Auguste, J.-L.; Xlim – Groupe “Fibres Optiques”, 123, Avenue Albert THOMAS 87060 Limoges Cedex, Humbert, G.; Xlim – Groupe “Fibres Optiques”, 123, Avenue Albert THOMAS 87060 Limoges Cedex, Delaizir, G.; SPCTS – 12, Rue Atlantis 87068 Limoges Cedex, Blondy, J.-M.; Xlim – Groupe “Fibres Optiques”, 123, Avenue Albert THOMAS 87060 Limoges Cedex, Martin, P.-O.; Xlim – Groupe “Fibres Optiques”, 123, Avenue Albert THOMAS 87060 Limoges Cedex & Grimm, S.; IPHT- Institut Für Photonische Technologien E.V., Albert-Einstein-Straße 9, 07702 Jena Germany
The purpose of this presentation is to give an overview of techniques available to produce original optical fibers and application dedicated. Some alternative fabrication solutions to the well-know stack and draw technique will be developed, following by the interest to join the stack and draw technique to other ones like Repusil® Technique, Rod in Tube and finally the Powder in Tube methods, first described by the Bell Lab in the seventies and up to date...

PPLN Crystals for Nonlinear-optical Detection of Terahertz Wave Radiation

Yakunin, P.V.; Moscow State University, Moscow, 119991 Russia, Naumova, I.I.; Moscow State University, Moscow, 119991 Russia, Kitaeva, G.Kh.; Moscow State University, Moscow, 119991 Russia, Tuchak, A.N.; Moscow State University, Moscow, 119991 Russia Moscow State Textile University, Moscow, 119991 Russia & Kornienko, V.V.; Moscow State University, Moscow, 119991 Russia
Periodically poled lithium niobate crystals can be utilized in nonlinear-optical spectral brightness detectors of terahertz range. In this paper characteristics of detectors were determined by analyzing spectra of spontaneous parametric down- and up-conversion in these crystals.

Efficient femtosecond optical parametric amplification and wavelength conversion in silicon waveguides

Sun, Q.; State Key Laboratory Of Transient Optics And Photonics Technology, Xi’an Institute Of Optics And Precision Mechanics, Chinese Academy Of Science (CAS), Xi’an, 710119, Liu, H.; State Key Laboratory Of Transient Optics And Photonics Technology, Xi’an Institute Of Optics And Precision Mechanics, Chinese Academy Of Science (CAS), Xi’an, 710119, Wen, J.; State Key Laboratory Of Transient Optics And Photonics Technology, Xi’an Institute Of Optics And Precision Mechanics, Chinese Academy Of Science (CAS), Xi’an, 710119, Huang, N.; State Key Laboratory Of Transient Optics And Photonics Technology, Xi’an Institute Of Optics And Precision Mechanics, Chinese Academy Of Science (CAS), Xi’an, 710119 & Wang, Z.; State Key Laboratory Of Transient Optics And Photonics Technology, Xi’an Institute Of Optics And Precision Mechanics, Chinese Academy Of Science (CAS), Xi’an, 710119
Efficient femtosecond optical parametric amplification and wavelength conversion via four-wave mixing (FWM) in silicon waveguides are demonstrated. In the femtosecond FWM process, the spectra are greatly broadened, and it is difficult to achieve efficient wavelength conversion and parametric amplification when the pump and signal pulse widths are close to or less than 100 fs because of the spectral overlap. The spectral overlap can be suppressed by tailoring the dispersion profiles of the silicon waveguides, and...

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...

Photon Synthesis of Nanometric Films Based on Transitional Metal oxides for Multi-Parameter Sensors

Mulenko, S.A.; Institute For Metal Physics NAS Of Ukraine, 03142, Kiev-142, Ukraine, Valerini, D.; University Of Salento, Department Of Physics, 73100 Lecce, Italy, Caricato, A.P.; University Of Salento, Department Of Physics, 73100 Lecce, Italy & Luches, A.; University Of Salento, Department Of Physics, 73100 Lecce, Italy
The reactive pulsed laser deposition (RPLD) based on a KrF laser was used for photon synthesis of nanometric iron and chromium oxides films. RPLD allows controlling the thickness and stoichiometry of deposits with definite band gap. So RPLD was used for synthesizing nanometric iron and chromium oxides films for thermo-photo-chemical sensors. We compared sensing properties of iron and chromium oxides nanometric films deposited on <100>Si substrate by RPLD. These iron and chromium oxides films have...

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.

Numerical reconstruction of 3D image in Fourier domain confocal optical coherence microscopy

Grebenyuk, A.A.; Saratov State University, Astrakhanskaya Str. 83, Saratov, 410012, Russia & Ryabukho, V.P.; Saratov State University, Astrakhanskaya Str. 83, Saratov, 410012, Russia Institute Of Precision Mechanics And Control, Russian Academy Of Sciences, Rabochaya Str. 24, Saratov, 410028, Russia
Along with high longitudinal resolution of optical coherence tomography, confocal optical coherence microscopy (OCM) provides high transversal resolution due to relatively high numerical apertures. However, the presence of relatively high numerical apertures leads to limited depth of field, which reduces the speed of OCM and decreases the advantage of Fourier domain detection. In this paper we propose a numerical processing technique for three-dimensional image reconstruction in Fourier domain OCM. It takes into account not only...

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...

Construction of microfluidic biochips with enhanced functionalities using 3D femtosecond laser direct writing

Midorikawa, K.; Laser Technology Laboratory, RIKEN-Advanced Science Institute, Hirosawa 2-1, Wako, Saitama 351-0198, Japan, Sugioka, K.; Laser Technology Laboratory, RIKEN-Advanced Science Institute, Hirosawa 2-1, Wako, Saitama 351-0198, Japan, Qiao, L.; State Key Laboratory Of High Field Laser Physics, Shanghai Institute Of Optics And Fine Mechanics, Chinese Academy Of Sciences, P.O. Box 800-211, Shanghai 201800, China, Liao, Y.; State Key Laboratory Of High Field Laser Physics, Shanghai Institute Of Optics And Fine Mechanics, Chinese Academy Of Sciences, P.O. Box 800-211, Shanghai 201800, China, He, F.; State Key Laboratory Of High Field Laser Physics, Shanghai Institute Of Optics And Fine Mechanics, Chinese Academy Of Sciences, P.O. Box 800-211, Shanghai 201800, China & Cheng, Y.; State Key Laboratory Of High Field Laser Physics, Shanghai Institute Of Optics And Fine Mechanics, Chinese Academy Of Sciences, P.O. Box 800-211, Shanghai 201800, China
The extreme nonlinear interaction betweenfemtosecond laser pulses and large-band-gapmaterials has enabled three-dimensional (3D)microfabrication inside transparent materials. In thepast decade, this technique has been used forcreating a variety of functional components in glassmaterials, including microoptics, microfluidics,microelectronics, micromechanics, etc. Using thesebuilding blocks, femtosecond laser microfabricationalso allows for construction of highly integratedmicrodevices. Here, we provide an overview of ourlatest progress made along this direction, includingfocal spot engineering and nanofluidic fabrication.In particular, we show that 3D micro-/nano-fluidiccomponents with arbitrary...

Influence of Submillisecond Er-Laser Pulses on Mechanical Properties of Hard Tooth Tissues

Belikov, A.V.; Saint-Petersburg National Research University Of Information Technologies, Mechanics And Optics, Saint-Petersburg, 197101, Russia, Skrypnik, A.V.; Saint-Petersburg National Research University Of Information Technologies, Mechanics And Optics, Saint-Petersburg, 197101, Russia & Shatilova, K.V.; Saint-Petersburg National Research University Of Information Technologies, Mechanics And Optics, Saint-Petersburg, 197101, Russia
In this paper the influence of pulse duration, pulse repetition rate, pulse number (at single point), and pulse energy of YLF: Er laser radiation with λ=2.84 μm on mechanical properties of human hard tooth tissues was studied. It was found that the multi-pulses action of this laser radiation with pulse energy below hard tooth tissues ablation threshold promotes increase in the microhardness of enamel at 25% and microhardness of dentine at 35%. Such research can...

Registration Year

  • 2013
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