62 Works

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

P. Schwaller, F. Baumberger, P. Cam, M. Schmid & S. Pilz
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 topics this year will be Laser...

Laser Structuring of Glass-Carbon for Improvement of Its Emitting Properties

Chebotarevsky, Yu.V.; Gagarin Saratov State Technical University, 77, Polytechnicheskaya St., Saratov, 410054, Russia, Surmenko, E.L.; Gagarin Saratov State Technical University, 77, Polytechnicheskaya St., Saratov, 410054, Russia, Popov, I.A.; Gagarin Saratov State Technical University, 77, Polytechnicheskaya St., Saratov, 410054, Russia & Sokolova, T.N.; Gagarin Saratov State Technical University, 77, Polytechnicheskaya St., Saratov, 410054, Russia
Laser structuring as a stage of laser micromachining operations for a glass-carbon plate processing is described. The operations of laser scribing, milling, cleaning and marking were used for production of the field-emission multi-beam cathode preform. The operation of structuring was applied for production of micropeaks on the surface of the cathode beams. Two different approaches were tested for laser structuring of the cathode beams - linear scan and overlapping blind holes. The nanopeaks are self-organized...

Kerr-lens mode locking in a ring bidirectional YAG:Cr4+ laser

Fomitchev, A.A.; Moscow Institute Of Physics And Technology (State University), Institutsky Per. 9, Dolgoprudny, Moscow Region, 141700, Russia, Broslavets, Yu.Yu.; Moscow Institute Of Physics And Technology (State University), Institutsky Per. 9, Dolgoprudny, Moscow Region, 141700, Russia & Georgieva, M.A.; Moscow Institute Of Physics And Technology (State University), Institutsky Per. 9, Dolgoprudny, Moscow Region, 141700, Russia
This paper concerns a bidirectional ring YAG:Cr4+lаser. We investigated the features of bidirectional generation and explored the possibility of gyroscopic effect in the laser. We developed the model of bidirectional generation of such a laser taking into account spectral properties of the active medium.Experiments in our setup revealed that generation of the laser had a cluster character. Luminescence spectrum of the YAG:Cr4+ crystal and generation spectra of the laser showed that this medium has both...

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...

Application of Photothermal and Photoacoustic Spectroscopy for the Monitoring of Aqueous Dispersions of Carbon Nanomaterials

Volkov, D.S.; Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia, Zharov, V.P.; Philips Classic Laser Laboratories, University Of Arkansas For Medical Sciences, Little Rock, Arkansas, 72205, USA, Korobov, M.V.; Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia, Nedosekin, D.A.; Philips Classic Laser Laboratories, University Of Arkansas For Medical Sciences, Little Rock, Arkansas, 72205, USA, Vasil’Ev, D.V.; Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia, Mikheev, I.V.; Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia & Proskurnin, M.A.; Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, Moscow, 119991, Russia
Photothermal  and  optoacoustic  spectroscopy  in their  state-of-the-art  techniques—multiwavelength, scanning  and  transient—are  used  for  complex investigation  and analysis  (chemical  analysis  and the  estimation  of  physicochemical  properties and size)  of  novel  carbon  materials—fullerenes  and nanodiamonds—and  their aqueous  dispersions  as promising biomedical nanosystems. The estimation of the cluster size and the possibilities to determine subnanogram  amounts  of  both nanodiamonds  and fullerenes  by  these  techniques  are  shown.  The comparison  of fullerene  solutions  in  various solvents,  toluene, N-methylpyrrolydone and  water, is made.  The  advantages  of  the  photothermal  and optoacoustic  techniques  over conventional spectroscopies  and  the...

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...

CARS diagnostics of near-critical fluid in small mesopores

Morozov, V.B.; International Laser Center And Physics Department Of M.V. Lomonosov Moscow State University, Moscow, 119991 Russia, Bagratashvili, V.N.; Institute Of Perspective Laser And Information Technologies Of Russian Academy Of Science, Troitsk, Moscow Region, 142190 Russia & Arakcheev, V.G.; International Laser Center And Physics Department Of M.V. Lomonosov Moscow State University, Moscow, 119991 Russia
Due to the high spacial resolution and theinterference nature, coherent anti-Stokes Ramanscattering (CARS) spectroscopy is well suited forthe diagnostics of composites based on transparentnanoporous hosts. In particular, the adsorption of afluid on the walls of nanopores and the formation ofa condensed phase in their volume leads to obvioustransformation of the CARS spectra. Recently wehave developed a model which describes thebehavior of molecular spectra at isothermalcompression in cylindrical nanopores. Calculationsbased on the model have shown a...

Pulse Laser Deposition method for UV-Photocathode production

Denisov, N.N.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 119991, Moscow, Vavilov Str., 38, Trutnev, U.A.; FSUE RFNC - VNIIEF, 607188, Sarov, Nizhny Novgorod Region, Mira Ave, 37, Bukin, V.V.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 119991, Moscow, Vavilov Str., 38, Garanin, S.G.; FSUE RFNC - VNIIEF, 607188, Sarov, Nizhny Novgorod Region, Mira Ave, 37, Terehin, V.A.; FSUE RFNC - VNIIEF, 607188, Sarov, Nizhny Novgorod Region, Mira Ave, 37, Garnov, S.V.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 119991, Moscow, Vavilov Str., 38, Brendel, V.M.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 119991, Moscow, Vavilov Str., 38 & Bagdasarov, V.Ch.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 119991, Moscow, Vavilov Str., 38
Production method of alkali halides UVphotocathodes durable to environment exposure was proposed. Photocathodes with highhomogeneous and adhesion photoemission layerwere made. Quantum yield measurements results ofmanufactured photocathodes are presented.Developed method is promising for creation of highaperture electron injectors and detectors.

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...

A method of treatment microbe nature disease using multiwave laser radiation

Kuzmina, A.G.; First Moscow State Medical University By I.M.Sechenov, Mochovaya, 11, Moscow, 119992, Russia, Lovachova, O.V.; Advanced Energy Technologies LTD , Sretensky Bul 7/1/8, Moscow, 107045, Russia Central TB Research Institute Of The Russian Academy Of Medical Sciences Yauzskaya Alley,2, Moscow,, Sirotkin, A.A.; Prokhorov General Physics Institute Of The Russian Academy Of Sciences, Vavilov 38, Moscow, 119991, Russia Advanced Energy Technologies LTD , Sretensky Bul 7/1/8, Moscow, 107045, Russia & Kuzmin, G.P.; Prokhorov General Physics Institute Of The Russian Academy Of Sciences, Vavilov 38, Moscow, 119991, Russia Advanced Energy Technologies LTD , Sretensky Bul 7/1/8, Moscow, 107045, Russia
Multiwave laser medical device "Livadia" has been developed either for bactericidal or for therapeutic impact on the affected organism parts. This device is on the diode pumped solid state laser and main wavelength radiation conversion 1064 nm into the second harmonic 532 nm and forth harmonic 266 nm. It has been shown that UV radiation on t he wavelength 266 nm on bronchia mucosa with various inflammation types improves regenerative processes in bronchia tissues that...

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 used  to  determine  surface movement  during  laser  irradiation  (wavelength  – 2.94 um,  pulse...

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, B. Jäggi, B. Neuenschwander & V. Romano
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...

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...

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...

Raman Structural Study Of Olefin Blends

Starchak, E.E.; Semenov Institute Of Chemical Physics, Russian Academy Of Sciences, 4 Kosygin St., Moscow, 119991, Russia, Prokhorov, K.A.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 38 Vavilov St., Moscow, 119991, Russia, Nikolaeva, G.Yu.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 38 Vavilov St., Moscow, 119991, Russia, Sagitova, E.A.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 38 Vavilov St., Moscow, 119991, Russia, Ushakova, T.M.; Semenov Institute Of Chemical Physics, Russian Academy Of Sciences, 4 Kosygin St., Moscow, 119991, Russia, Zavgorodnev, Yu.V.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 38 Vavilov St., Moscow, 119991, Russia “MATI”—Tsiolkovsky Russian State Technological University, Orshanskaya 3, Moscow, 121552 Russia, Novokshonova, L.A.; Semenov Institute Of Chemical Physics, Russian Academy Of Sciences, 4 Kosygin St., Moscow, 119991, Russia, Pashinin, P.P.; Prokhorov General Physics Institute, Russian Academy Of Sciences, 38 Vavilov St., Moscow, 119991, Russia & Antipov, E.M.; Topchiev Institute Of Petrochemical Synthesis, Russian Academy Of Sciences, 29 Leninsky Pr., Moscow, 119991, Russia
We carried out detailed Raman structural study ofmelt-mixed blends of linear low-densitypolyethylene (PE) and isotactic polypropylene (PP).The relative content of PE in the PE/PP blendsvaried from 13 to 75 %. We show that Ramanspectroscopy can be effectively used for aquantitative analysis of phase and conformationalcompositions of these blends. The changes in thesecompositions due to changing the content of theblend components are discussed. Also, we studied astructure of the amorphous phase of reactor blendsof PE with...

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  irradiated  by  laser pulses of about 100 ps duration and wavelength...

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  to  SESAM-based laser,  the SWCNT  mode-locked  laser  generates 450-fs  pulses  of...

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, F. Salin, 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...

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...

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...

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...

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.

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...

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 determining the power spectral density...

Publication Year

  • 2013
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