The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
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Volume 27, Issue 8
Displaying 1-11 of 11 articles from this issue
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  • How the Laser Happened
    Keitaro YOSHIHARA
    1999 Volume 27 Issue 8 Pages 517
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.517
    JOURNAL FREE ACCESS
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  • Special Issue on New Optical Materials in Ultraviolet Region
    Nobuhiko SARUKURA
    1999 Volume 27 Issue 8 Pages 518
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.518
    JOURNAL FREE ACCESS
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  • Harmonic Generation of Nd: YAG Laser in GdxY1-xCa4O (BO3)3 Crystal (GdYCOB)
    Masashi YOSHIMURA, Yusuke MORI, Takatomo SASAKI
    1999 Volume 27 Issue 8 Pages 519-524
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.519
    JOURNAL FREE ACCESS
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    GdxY1-xCa4O (BO3)3 (GdYCOB) has been grown by the Czochralski technique and characterized for harmonic generator of a Nd: YAG laser. Increase of Gd concentration in GdYCOB makes the birefringence small; therefore the solid solution GdYCOB gradually changes the phase-matching angles of type-I third- and type-II second-harmonic generation (THG and SHG) to (θ, φ) = (90°, 90°). Third-harmonic light was generated by mixing between 1.064- and 0.532-μm lights. This material is noncritically phase matchable for THG (x=0.28) and SHG (x=0.275) at room temperature. The effective nonlinear coefficient was found to be 0.55 pm/V for THG and 0.35 pm/V for SHG. Angular properties such as angular acceptances and walk-off angle are drastically improved by utilization of noncritical phase matching.
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  • 193 nm Generation by Optical Frequency Conversion Using CsLiB6O10 Crystal (CLBO)
    Kyoichi DEKI, Jun SAKUMA, Yasu OHSAKO, Andrew FINCH, Toshio YOKOTA, Ma ...
    1999 Volume 27 Issue 8 Pages 525-530
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.525
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    Two sum-frequency mixing scheme for 193-nm generation have been investigated using CLBO as the final mixing crystal. One scheme mixes the output of an optical parametric oscillator, operating at 2.1μm, with the 5th harmonic of a Nd: YAG laser. The second scheme mixes the fundamental wave of a Nd: YAG laser (1064.2 nm) with ultraviolet light at 236.4 nm. In the latter scheme, according to the Sellmeier equations obtained from the published refractive index data, Type I CLBO should critically phase-match to generate 193.4-nm output. However, in our experiments, no phase matching at room temperature was observed. The CLBO did show non-critical phase-matching (NCPM) at the wavelength combination: λ1=1064.2 nm, λ2=238.8 nm and λ3=195.0 nm at room temperature (24°C). In a temperature tuning experiment performed with this mixing scheme (λ1 fixed at 1064.2 nm and λ2 varied), it was discovered that CLBO needs to be cooled below -180°C in order to generate 193.4 nm.
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  • [title in Japanese]
    1999 Volume 27 Issue 8 Pages 530-530,535
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.530
    JOURNAL FREE ACCESS
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  • Intra-Cavity Frequency Doubling of CW Argon Ion Lasers
    Yoichi TAIRA, Kuniaki SUEOKA
    1999 Volume 27 Issue 8 Pages 531-535
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.531
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    Over one-watt continuous coherent light in a quarter micrometer wavelength region is obtained by the frequency doubling of ion lasers and solid state lasers. It is shown experimentally as well as theoretically that more than a half of the fundamental output of the source laser is converted to the UV light when the intracavity loss is sufficiently low. The applications of such UV light are also discussed.
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  • Lasing of Excitons in ZnO Thin Films
    Yusaburo SEGAWA
    1999 Volume 27 Issue 8 Pages 536-540
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.536
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    A high quality ZnO thin film was grown by the laser molecular beam epitaxial technique. Under high-density excitation, the exciton-exciton collision process (P line) was observed at room temperature in ZnO thin films where the exciton binding energy is 60 meV. From the edge of the sample, a rapid increase in the P line was observed with increasing excitation power. A fine structure originating from the cavity mode was also observed. These facts suggest the lasing of the exciton at room temperature. Crystal growth of the ZnMgO mixed crystal and the stability of the ZnO/ZnMgO heterostructure were discussed. Optical properties of the ZnO/Zn0.8Mg0.2O multi-quantum-well show that the electrons and holes are well confined in this heterostructure.
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  • Growth and UV Nonlinear Properties of Optical-Grade Lithium Tetraborate (Li2B4O7) Crystals
    Ryuichi KOMATSU, Tamotsu SUGAWARA, Noriko WATANABE, Satoshi UDA, Valen ...
    1999 Volume 27 Issue 8 Pages 541-546
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.541
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    High quality and scatters-free LB4 crystals are successfully grown. Nonlinear optical properties of this new promising crystal in UV range are described remarking on the long-term reliability required to nonlinear devices. New applications using LB4 are also discussed.
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  • Fluoride Single Crystals for UV Solid-State Laser Applications
    Kiyoshi SHIMAMURA, Sonia L. BALDOCHI, Zhenlin LIU, Nobuhiko SARUKURA, ...
    1999 Volume 27 Issue 8 Pages 547-552
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.547
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    A new, highly reproducible crystal growth technique for high quality fluorides has been developed. A series of Ce-doped fluorides free from cracks and inclusions, including LiCaAlF6, LiSrAlF6, LiYF4, and LiLuF4, have been grown for UV laser applications. The effective distribution coefficient of Ce in each crystal has been determined. 60-mJ pulses at 289-nm were generated using Ce: LiCaAlF6 single crystals. Un-doped LiCaAlF6 single crystal exhibited extended transmission to 112 nm.
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  • Report on CLEO/QELS'99
    Hiroshi TAKUMA, Takayoshi KOBAYASHI, Taro SEKIKAWA, Yusuke TAMAKI, Nob ...
    1999 Volume 27 Issue 8 Pages 553-571
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.553
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  • Fundamentals of Laser Measurements I: Velocity Measurements
    Yoshihisa AIZU, Toshiaki IWAI, Toshimitsu ASAKURA
    1999 Volume 27 Issue 8 Pages 572-578
    Published: August 15, 1999
    Released on J-STAGE: March 17, 2010
    DOIhttps://doi.org/10.2184/lsj.27.572
    JOURNAL FREE ACCESS
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