The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
Search
Advanced search
OR
Browse
Search
Volume 19, Issue 5
Displaying 1-10 of 10 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • [title in Japanese]
    Sadao NAKAI
    1991 Volume 19 Issue 5 Pages 431-432
    Published: May 29, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.19.5_431
    JOURNAL FREE ACCESS
    Download PDF (150K)
  • Toward Microphotoconversion
    Laser Manipulation of a Fine Particle
    [in Japanese], [in Japanese]
    1991 Volume 19 Issue 5 Pages 433-439
    Published: May 29, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.19.5_433
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    By introducing CW and pulsed lasers into optical microscope, we have set up a laser trapping spectroscopy-ablation system which enables us to study spectroscopic and dynamic properties of an individual single particle in solution. We demonstrated three-dimensional laser trapping of various, μm-order particles and determined the trapping force to be in the order of pN. When a laser-trapped particle was further irradiated by a pulsed laser, ablative penetration of the particle by a minute hole was observed. It was demonstrated, furthermore, that a single microcapsule containing organic reagents was chosen, transferred, and ablated to eject the inner organic solution in an arbitrary spatial position by the present technique. A manipulation tool for controlling chemical reactions in the μm-size volume is now realized by this technique.
    View full abstract
    Download PDF (2542K)
  • Characterization of Defects in Crystals by Laser Scattering CT
    Taijing LU, Koichi TOYODA, Nobuhito NANGO, Tomoya OGAWA
    1991 Volume 19 Issue 5 Pages 440-450
    Published: May 29, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.19.5_440
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Theories of light scattering from lattice detects of crystals induced by an incident laser beam from an electromagnetic wave point of view and the detection method and instrument of light scattering are reviewed. Microdefects and microprecipitates in crystals were non-destructively detected and characterizied in the bulk and near surface of crytals by laser light scattering tomography. The three dimensional distribution of defects in crystals can be obtained by layer-by-layer tomographic observation. Some results of observation will be done here about the microdefects in semiconductive crystals by a method using a YAG laser beam.
    View full abstract
    Download PDF (2222K)
  • Demonstration of Degenerate Four Wave Mixing and Phase Conjugation of CO2 Laser in a Plasma
    Yoneyoshi KITAGAWA, Chan JOSHI
    1991 Volume 19 Issue 5 Pages 451-460
    Published: May 29, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.19.5_451
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Experimental evidence of degenerate four wave mixing in a plasma is presented for the first time. A thermal-force contribution to the signal reflectivity, as evidenced by its temporal shape and dependence on plasma density, pump and probe intensities, and polarizations dominates that due to the ponderomotive force in a collisional plasma. In SF6 gas, two pump-probe gratings contribute almost equally to the reflectivity. It is also found that ion acoustic resonance can enhance the phase conjugate reflectivity in the plasma.
    View full abstract
    Download PDF (905K)
  • Analysis for Pumping Geometries of LD Side-pumped Solid State Lasers
    Hideaki SAITO, Hiroshi HARA, Hiroshi IMOTO, Tetsuo HARADA, Hiroyuki KU ...
    1991 Volume 19 Issue 5 Pages 461-467
    Published: May 29, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.19.5_461
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Excited power distributions of an LD side-pumped Nd-YAG laser were examined using a geometrical model. Our calculated results were found to agree with those obtained in the experiments. The excited power distribution in a rod and the beam quality of the YAG oscillation were depending greatly on the geometrical position of the LD laser. Based on our model, multi-fold pumping geometries were also discussed.
    View full abstract
    Download PDF (967K)
  • Spectroscopic Studies on Ion Excimers Excited by Electron Beam
    Ken-ichi UEDA, Da XING, Hiroshi TAKUMA
    1991 Volume 19 Issue 5 Pages 468-475
    Published: May 29, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.19.5_468
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Theoretical and experimental studies have been carried out to investigate the spectroscopic data on ionic excimers. Calculated emissions of Rb2+F- agreed with the emission spectra with good accuracy. Ab initio calculations showed the scaling of emission wavelength on atomic num-ber of rare gas atoms and alikali atoms. The Cs2+F- emission spectra excited by intense electron beams were identified as B-X transition at 185 nm and as D-X transition at 152 nm. The formation mechanism was discussed from the buffer gas effects.
    View full abstract
    Download PDF (772K)
  • Na2 Near Infrared and Violet Excimer Emissions by Electron Beam Excitation
    Da XING, Ken-ichi UEDA, Hiroshi TAKAUMA
    1991 Volume 19 Issue 5 Pages 476-489
    Published: May 29, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.19.5_476
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A near infrared broadband excimer emission band and an amplified sponaneous emission (ASE) of the Na2 violet excimer band have been observed by electron beam excitation of a dense sodium vapor. The continuum from 820 to 900 nm is attributed to the Na2 first bound-free transition band c3Σ+g→ a3Σ+u and the violet excimer band centered at 436 nm is attributed to the Na2 23IIg→ a3Σ+u bound-free emission which was already observed in the optical pumping. The mechanisms for the c3Σ+g state formation are proposed to be the three-body collision recombination and the atom-molecule collisional energy transfer. The formation of the 23IIg state is proposed by a dissociative recombination of Na3+ which is efficiently yielded by electron beam. In addition, a discrete structure band observed on the long wavelength side of the violet bands is believed from the Na2 21Σu+→ X1Σg+ bound-bound transitions.
    View full abstract
    Download PDF (1434K)
  • Low Pressure Atomic Xenon Laser Excited by Self-Sustained Longitudinal Discharge
    Katsuhiko KOMATSU, Eiichi MATSUI, Fumihiko KANNARI, Minoru OBARA
    1991 Volume 19 Issue 5 Pages 490-495
    Published: May 29, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.19.5_490
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A compact longitudinally excited atomic xenon laser excited by self-sustained discharge is constructed. The discharge is driven directly by a compact coaxial-type 4-stage Marx generator. Its spectral and performance characteristics are reported at low total pressures of 20-100 Torr. For mixtures of Ar/Xe, He/Ar/Xe, and He/Xe, the 2.03 and 2.65 μm lines are dominated in the laser spectrum. Other strong lines are also observed at 1.73, and 2.63 μm in the Ar/Xe mixture. In a low pressure operation the laser is found to be pumped by a direct electron impact excitation process rather than a rare-gas ion recombination process.
    View full abstract
    Download PDF (542K)
  • Report on the Fourth International Congress on Optical Science and Engineering
    Masanobu YAMANAKA
    1991 Volume 19 Issue 5 Pages 496-498
    Published: May 29, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.19.5_496
    JOURNAL FREE ACCESS
    Download PDF (227K)
  • [title in Japanese]
    1991 Volume 19 Issue 5 Pages plate1
    Published: May 29, 1991
    Released on J-STAGE: February 26, 2010
    DOIhttps://doi.org/10.2184/lsj.19.5_plate1
    JOURNAL FREE ACCESS
    Download PDF (1187K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top