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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (11): 1899-1906.DOI: 10.16553/j.cnki.issn1000-985x.2025.0135

• 研究论文 • 上一篇    下一篇

高电阻率RTP晶体生长与性能研究

王世武1,2(), 王鸿雁2(), 王惠2, 聂奕2, 张芳2, 朱海永3, 马爱珍2, 高佳2, 匡永飞2, 张行愚1   

  1. 1.山东大学信息科学与工程学院,青岛 266237
    2.青岛海泰光电技术有限公司,青岛 266107
    3.温州大学电气与电子工程学院,温州 325035
  • 收稿日期:2025-06-26 出版日期:2025-11-20 发布日期:2025-12-11
  • 通信作者: 王鸿雁
  • 作者简介:王世武(1980—),男,山东省人,博士研究生,正高级工程师。E-mail:202220478@mail.sdu.edu.cn
  • 基金资助:
    山东省重点研发计划(2021JMRH0202);山东省企业技术创新项目(2024537020000103)

Growth and Properties of RTP Crystals with High Resistivity

WANG Shiwu1,2(), WANG Hongyan2(), WANG Hui2, NIE Yi2, ZHANG Fang2, ZHU Haiyong3, MA Aizhen2, GAO Jia2, KUANG Yongfei2, ZHANG Xingyu1   

  1. 1. School of Information Science and Engineering,Shandong University,Qingdao 266237,China
    2. Qingdao Crystech Inc. ,Qingdao 266107,China
    3. College of Electrical and Electronic Engineering,Wenzhou University,Wenzhou 325035,China
  • Received:2025-06-26 Online:2025-11-20 Published:2025-12-11
  • Contact: WANG Hongyan

摘要: 本文采用顶部籽晶熔盐法结合动态温场技术,成功生长出大尺寸、高电阻率RTP晶体,并对RTP晶体的性能进行了研究。本研究中所生长的晶坯尺寸达到54 mm×68 mm×52 mm,质量达到265 g。晶坯内部质量均匀,结晶完好,电阻率集中在1.0×1012~3.4×1012 Ω·cm。1 064与532 nm激光照射晶体同一位置1 000 s后,抗灰迹吸收为125 ppm/cm。电子探针微区成分分析测试结果表明,电阻率高的RTP晶体原子摩尔百分比更接近化学计量比。电阻率为1.6×1012 Ω·cm的RTP晶体在直流电压3 200 V加压1 200 h后,无电流溢漏或击穿。在-40~70 ℃,RTP电光调Q开关均可正常运转且消光比大于20 dB@1 064 nm。RTP晶体的激光损伤阈值为1.78 GW/cm2@1 064 nm & 9.6 ns。这些研究结果为RTP晶体作为电光调Q开关的关键材料应用提供了重要依据。

关键词: RTP晶体; 电阻率; 抗灰迹吸收; RTP电光调Q开关; 消光比; 激光损伤阈值

Abstract: RTP crystals with large size and high resistivity were successfully grown by the top-seeded solvent growth method combined with dynamic temperature field control technology, and their properties were researched. The crystal size reaches 54 mm ×68 mm×52 mm and its weight reaches 265 g. The internal quality is uniform and the crystallization is intact. The resistivity of the crystal is concentrated within the range of 1.0×1012~1.4×1012 Ω·cm. The absorption of gray-tracking resistance is 125 ppm/cm after co-irradiation at the same crystal spot for 1 000 s by 1 064 and 532 nm laser. The electron probe micro-area composition analysis test result indicates that the molar percentage of each atom is closer to the stoichiometric ratio in the RTP crystal with higher resistivity. The RTP crystal with resistivity of 1.6×1012 Ω∙cm is no current leakage or breakdown when it is pressurized with a DC voltage of 3 200 V for 1 200 h. Within the temperature range from -40 ℃ to 70 ℃, the RTP electro-optic Q-switch could operate normally and the extinction ratio is higher than 20 dB@1 064 nm. The laser induced damage threshold of the RTP crystal is 1.78 GW/cm2@1 064 nm & 9.6 ns. These results provide important basis for the application of RTP crystals as a key material for electro-optic Q-switch.

Key words: RTP crystal; resistivity; absorption of gray-tracking resistance; RTP electro-optic Q-switch; extinction ratio; laser induced damage threshold

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