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DESIGN AND SYNTHESIS OF AN ULTRAVIOLET-TRANSPARENT NONLINEAR OPTICAL CRYSTAL SR2BE2B2O7

机译:紫外透明非线性光学SR2BE2B2O7的设计与合成

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摘要

POWERFUL, tunable ultraviolet laser sources, required for many spectroscopic applications, rely on the frequency-doubling of lasers in the visible range. Such second-harmonic generation (SHG) depends on the development of nonlinear optical (NLO) materials with high SHG coefficients, a wide transparent region in the ultraviolet, and moderate birefringence. Few such materials are available; those most widely used at present are the inorganic crystals beta-BaB2O4 (BBO)(1) and LiB3O5 (LBO)(2). These crystals are effective for SHG only down to wavelengths of 205 nm (ref. 3), because of a limited ultraviolet-transparent range in the former case and birefringence problems in the latter. We have developed previously(4) a new inorganic NLO crystal, KBe2BO3F2 (KBBF); which avoids both of these problems to a large degree. But it is hard to grow large crystals of KBBF because of weak binding between its layered structural units. We have now developed an improved material by rational design: Sr2Be2B2O7 (SBBO), which shares (and in fact slightly improves on) all of the favourable NLO properties of KBBF and is easy to grow as large (so far up to 7 x 7 x 3 mm) crystals of high optical quality. The large SHG coefficients and wide range of ultraviolet transparency make this material a promising candidate for frequency doubling into the ultraviolet. [References: 12]
机译:许多分光镜应用所需的强大的可调谐紫外激光源依赖于可见光范围内激光的倍频。这样的二次谐波生成(SHG)取决于具有高SHG系数,紫外线中的透明区域较宽且双折射适中的非线性光学(NLO)材料的开发。这种材料很少。目前使用最广泛的是无机晶体β-BaB2O4(BBO)(1)和LiB3O5(LBO)(2)。由于前者的紫外线透过范围有限,而后者的双折射问题,这些晶体仅对波长至205 nm的SHG有效(参考文献3)。我们先前已经开发了(4)一种新的无机NLO晶体KBe2BO3F2(KBBF);这在很大程度上避免了这两个问题。但是,由于KBBF的分层结构单元之间的结合较弱,因此很难生长大晶体。现在,我们通过合理的设计开发了一种改进的材料:Sr2Be2B2O7(SBBO),它具有KBBF的所有有利的NLO性质(并且实际上有所改进),并且很容易增长到最大(到目前为止达到7 x 7 x 3毫米)高光学质量的晶体。 SHG系数大且紫外线透过率范围广,使得该材料成为倍增紫外线频率的有希望的候选者。 [参考:12]

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  • 来源
    《Nature》 |1995年第6512期|p. 322-324|共3页
  • 作者单位

    CHINESE ACAD SCI FUJIAN INST RES STRUCT MATTER FUZHOU 350002 PEOPLES REPUBLIC OF CHINA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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