纳秒激光对磷酸钛氧铷晶体的损伤：晶体质量的缺失影响

Nanosecond laser induced damage in RbTiOPO4: the missing influence of crystal quality.

作者信息

Hildenbrand Anne, Wagner Frank R, Natoli Jean-Yves, Commandré Mireille

机构信息

Institut Fresnel, CNRS, Aix-Marseille Université, Ecole Centrale Marseille, Campus de Saint-Jérôme, 13013 Marseille, France.

出版信息

Opt Express. 2009 Sep 28;17(20):18263-70. doi: 10.1364/OE.17.018263.

DOI:10.1364/OE.17.018263

PMID:19907617

Abstract

Nanosecond laser induced damage in RbTiOPO(4) (RTP) an isomorphic material to the more widely known KTiOPO(4) (KTP) is studied in crystals with varying properties. The ionic conductivity along the z-axes of the tested crystals ranged from 1.5 10(-9) S/cm to 1.1 10(-12) S/cm. Further, different growth sectors with different absorption in the range of hundreds of ppm/cm and differing zones in inhomogeneous crystals have been investigated. Despite these important differences in crystal quality, no significant difference could be observed in the laser damage resistance at 1064 nm. Thus growth induced defects only play a minor role in nanosecond laser induced damage in RTP. Transient, laser induced defects are discussed in analogy with KTP as possible laser damage precursors.

摘要

在性质各异的晶体中研究了纳秒激光对磷酸氧钛铷（RbTiOPO₄，RTP）——一种与更为人熟知的磷酸氧钛钾（KTiOPO₄，KTP）同构的材料——造成的损伤。所测试晶体沿z轴的离子电导率范围为1.5×10⁻⁹ S/cm至1.1×10⁻¹² S/cm。此外，还研究了在数百ppm/cm范围内具有不同吸收率的不同生长扇区以及非均匀晶体中的不同区域。尽管晶体质量存在这些重要差异，但在1064 nm处的抗激光损伤能力未观察到显著差异。因此，生长诱导缺陷在RTP的纳秒激光损伤中仅起次要作用。与KTP类似，讨论了瞬态激光诱导缺陷作为可能的激光损伤前驱体的情况。