A High Conversion Efficiency Q-Switched Intracavity Nd:YVO_4/KTA Optical Parametric Oscillator under Direct Diode Pumping at 880nm

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英文篇名：A High Conversion Efficiency Q-Switched Intracavity Nd:YVO_4/KTA Optical Parametric Oscillator under Direct Diode Pumping at 880nm 作者：何丽娇 ; 刘可 ; 宗楠 ; 刘钊 ; 王志敏 ; 薄勇 ; 王小军 ; 彭钦军 ; 崔大复 ; 许祖彦 英文作者：Li-Jiao He;Ke Liu;Nan Zong;Zhao Liu;Zhi-Min Wang;Yong Bo;Xiao-Jun Wang;Qin-Jun Peng;Da-Fu Cui;Zu-Yan Xu;Key Lab of Solid-state Lasers, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences;University of Chinese Academy of Sciences;Key Lab of Functional Crystal and Laser Technology, Technical Institute of Physics and Chemistry,Chinese Academy of Sciences; 中文刊名：WLKB 英文刊名：中国物理快报(英文版) 机构：Key Lab of Solid-state Lasers, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences;University of Chinese Academy of Sciences;Key Lab of Functional Crystal and Laser Technology, Technical Institute of Physics and Chemistry,Chinese Academy of Sciences; 出版日期：2019-04-01 出版单位：Chinese Physics Letters 年：2019 期：v.36 基金：the National Natural Science Foundation of China under Grant Nos 61505226 and 61535013;; the Fund of Chinese Academy of Sciences under Grant No 6141A01071701 语种：英文; 页：WLKB201904006 页数：4 CN：04 ISSN：11-1959/O4 分类号：27-30

摘要

We report a high conversion efficiency Q-switched Nd:YVO_4/KTiOAsO_4(KTA) intracavity optical parametric oscillator(IOPO) operating near 3.5 um based on direct 880 nm laser diode(LD) pumping. A maximum average idler output power of 2.6 W with a pulse width of about 7.9 ns is achieved under an absorbed LD power of 45.4 W at a pulse repetition rate(PRR) of 10 kHz. The maximum optical-optical conversion efficiency from LD power to OPO mid-infrared(MIR) output of 6.74% is achieved. To our knowledge, this is the highest conversion efficiency for a KTA-IOPO by exploiting a Q-switched laser as the parent fundamental pump source. The beam quality factors M~2 of the MIR beam at the full output power with a PRR of 10 kHz are within 2.12 in both the horizontal and vertical directions, indicating a near Gaussian mode.
        We report a high conversion efficiency Q-switched Nd:YVO_4/KTiOAsO_4(KTA) intracavity optical parametric oscillator(IOPO) operating near 3.5 um based on direct 880 nm laser diode(LD) pumping. A maximum average idler output power of 2.6 W with a pulse width of about 7.9 ns is achieved under an absorbed LD power of 45.4 W at a pulse repetition rate(PRR) of 10 kHz. The maximum optical-optical conversion efficiency from LD power to OPO mid-infrared(MIR) output of 6.74% is achieved. To our knowledge, this is the highest conversion efficiency for a KTA-IOPO by exploiting a Q-switched laser as the parent fundamental pump source. The beam quality factors M~2 of the MIR beam at the full output power with a PRR of 10 kHz are within 2.12 in both the horizontal and vertical directions, indicating a near Gaussian mode.

引文

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