• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study of New Borate Crystal for Ultraviolet Light Generation

Research Project

Project/Area Number 08455038
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied optics/Quantum optical engineering
Research InstitutionOsaka University

Principal Investigator

SASAKI Takatomo  Faculty of Engineering, Osaka University, Professor, 工学部, 教授 (50029237)

Co-Investigator(Kenkyū-buntansha) MORI Yusuke  Faculty of Engineering, Osaka University, Research Associate, 工学部, 助手 (90252618)
TAKEI Humihiko  Faculty of Science, Osaka University, Professor, 理学部, 教授 (60005981)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥8,600,000 (Direct Cost: ¥8,600,000)
Fiscal Year 1997: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1996: ¥6,900,000 (Direct Cost: ¥6,900,000)
KeywordsCLBO / nonlinear optical crystal / frequency conversion / UV generation / mechanical property / chemical property / ボレート系結晶 / CsLiB_6O_<10> / 熱アニール / 水和物 / ビッカース硬度 / ボレート結晶
Research Abstract

The results obtained in this research are summarized as followings.
We have obtained 266 nm and 213 nm output with a pulse energy of 600 mJ and 320 mJ,respectively, from the input of 2800 mJ.To the best of my knowledge, these have been the highest ever generated UV laser energy through NLO frequency conversion of nanoseconds pulsed Nd : YAG laser. There were no crystal temperature control applied in this work. Excellent output stability and rounded beam pattern were observed. High power all solid state UV laser via CLBO crystal is realized.
Effect of doping on the various properties has been studied. It was found that Rb doping could shorten CLBO's SHG cutoff wavelength (lc), for example the lc became 2 nm shorter for the crystal grown from 10 mole % Rb-doped (Rs/Cd=0.1) melt. The Rb doping, however, has made CLBO more fragile. This was also the case for the K and Na doping. On the other hand, the Al doping could give rise to an enhancement of mechanical properties of CLBO.The Vickers hardness as a function of the Al/Cs ratio in the melt. Each data point represents an average value obtained from a number of indents on each sample. The hardness of undoped CLBO was 270 and 180 for (100) and (001) surfaces, respectively, while values for 1% Al-doped and 5% Al-doped CLBO were 290 and 310 for (100) and 220 and 230 for (001) surfaces. Actually, the Al-doped CLBO crystals have not been cracked even when they were the polycrystalline.
It was found that the hygroscopic nature of CLBO become less by the Al doping. The undoped and 2%Al doped CLBO crystals were dissoved in the solution of H_2O (20%) and glycerin (80%) in order to investigate the effect of doping on resistance against water. The samples have been dipped in the solution during experiment. This experiment has shown that the Al-doped CLBO is less soluble than undoped CLBO.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Y.K.Yap et al.: "Long-term operation of CsLiB_6O_<10> at elevated crystal temperature" Optics Letters. 23. 34-36 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.K.Yap et al.: "CsLiB_6O_<10> crystal for frequency doubling the Nd:YAG laser" Optics communications. 145. 104-106 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] H.Takei et al.: "Thermal Expansions of Pure and Al-doped CsLiB_6O_<10> Crystals for NLO Application" Jpn.J.Appl.Phys.36. 126-128 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 森 勇介、他: "紫外光発生用非線形光学結晶CsLiB_6O_<10>の開発" 機械の研究. 49. 250-256 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 森 勇介、他: "新しい紫外光発生用の非線形光学結晶CsLiB_6O_<10>" 応用物理. 66. 965-969 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.K.Yap, T.Inoue, H.Sakai, Y.Kagebayashi, Y.Mori, T.Sasaki, K.Deki, and M.Horiguchi: "Long-term operation of CsLiB_6O_<10> at elevated crystal temperature" Optics Letters. Vol.23. 34-36 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Y.K.Yap, S.Haramura, A.Taguchi, Y.Mori, and T.Sasaki: "CsLiB_6O_<10> crystal for frequency doubling the Nd : YAG laser" Optics communications. Vol.145. 104-106 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Humihiko Takei, Takuya Suzuki, Mikito Mamiya, Fumiko Sakai, Masayoshi Koike, Yusuke Mori, and Takatomo Sasaki: "Thermal Expansions of Pure and Al-doped CsLiB_6O_<10> Crystals for Nonlinear Optical Applications" Jpn.J.Appl.Phys.Vol.36, No.1A. 126-128 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoke-Khin, Yap, Masato Inagaki, Satoshi Nakajima, Yusuke Mori, and Takatomo Sasaki: "High-power fourth- and fifth-harmonic generation of a Nd : YAG laser by means of a CsLiB_6O_<10>" Optics Letters. Vol.21, No.17. 1348-1350 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A,Taguchi 他5名: "Effects of the moisture on CsLiB_6O_<10>" OSA Trends in Optics and Photonics「Advanced Solid-State Laser」. 10. 19-23 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.K.Yap 他5名: "Long-term operation of CsLiB_6O_<10> at elevated crystal temperature" Optics Letters. 23. 34-36 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.K.Yap 他4名: "CsLiB_6O_<10> crystal for frequency doubling the Nd:YAG laser" Optics Communications. 145. 101-104 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Humihiko Takei: "Thermal Epansions of pure and Al-doped CLBO crystals for NLO applications" Japanese Journal of Applied Physics. 36. 126-128 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yusuke Mori: "High power 4H and 5HG of a Nd : YAG laser by means of a CLBO" Optics Letters. 21. 1348-1350 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yusuke Mori: "Effects of the moisture on CLBO" Proceedings of Advanced Solid-State Lasers '97. (in press). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yusuke Mori: "High power all-solid-state UV laser by CLBO crystal" Proceedings of Advanced Solid-State Lasers '97. (in press). (1997)

    • Related Report
      1996 Annual Research Report

URL: 

Published: 1996-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi