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首页> 外文期刊>Optics Letters >Few-cycle pulses tunable from 3 to 7 mu m via intrapulse difference-frequency generation in oxide LGN crystals
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Few-cycle pulses tunable from 3 to 7 mu m via intrapulse difference-frequency generation in oxide LGN crystals

机译：几个循环脉冲通过氧化物LGN晶体中的intapulse差频产生从3至7μm调谐

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摘要

An ultrashort mid-infrared (IR) source beyond 5 mu m is crucial for a plethora of existing and emerging applications in spectroscopy, medical diagnostics, and high-field physics. Nonlinear generation of such sources from well-developed near-IR lasers, however, remains a challenge due to the limitation of mid-IR crystals. Based on oxide La3Ga5.5Nb0.5O14 (LGN) crystals, here we report the generation of femtosecond pulses tunable from 3 to 7 mu m by intrapulse difference-frequency generation of 7.5 fs, 800 nm pulses. The efficiency and bandwidth dependences on pump polarization and crystal length are studied for both Type-I and Type-II phase-matching configurations. Maximum pulse energy of similar to 10 nJ is generated at 5.2 mu m with a conversion efficiency of similar to 0.14%. Because of the few-cycle pump pulse duration, the generated mid-IR pulses are as short as about three cycles. These results, to the best of our knowledge, represent the first experimental demonstration of LGN in generating mid-IR ultrashort pulses. (C) 2020 Optical Society of America
机译：超短半红外线（IR）源超过5μm，对于光谱，医疗诊断和高场物理学中的现有和新兴应用的血清，是至关重要的。然而，由于中红外晶体的限制，从发达的近红外激光器的非线性产生这种来源仍然是挑战。基于氧化物La3Ga5.5nb0.5014（Lgn）晶体，在这里，我们通过intapulse差频 - 频率产生7.5 fs，800nm脉冲来报告从3至7 mu m调谐的飞秒脉冲的产生。研究I I型和II型相位匹配配置研究了泵偏振和晶体长度的效率和带宽依赖性。类似于10 nJ的最大脉冲能量为5.2μm，转化效率类似于0.14％。由于几个周期泵脉冲持续时间，所产生的中红外脉冲短至三个周期。尽可能知道这些结果代表了LGN在产生中外超短脉冲中的第一个实验证明。 （c）2020美国光学学会

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  • 来源
    《Optics Letters》 |2020年第20期|共4页
  • 作者

    Liu Jinsheng; Ma Jingui; Lu Dazhi; Gu Xingbin; Cui Ziruo; Yuan Peng; Wang Jing; Xie Guoqiang; Yu Haohai; Zhang Huaijin; Qian Liejia;

  • 作者单位

    Shanghai Jiao Tong Univ Sch Phys &

    Astron Collaborat Innovat Ctr IFSA CICIFSA Key Lab Laser Plasmas MOE Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Phys &

    Astron Collaborat Innovat Ctr IFSA CICIFSA Key Lab Laser Plasmas MOE Shanghai 200240 Peoples R China;

    Shandong Univ State Key Lab Crystal Mat Jinan 250100 Peoples R China;

    Shanghai Jiao Tong Univ Sch Phys &

    Astron Collaborat Innovat Ctr IFSA CICIFSA Key Lab Laser Plasmas MOE Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Phys &

    Astron Collaborat Innovat Ctr IFSA CICIFSA Key Lab Laser Plasmas MOE Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Phys &

    Astron Collaborat Innovat Ctr IFSA CICIFSA Key Lab Laser Plasmas MOE Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Phys &

    Astron Collaborat Innovat Ctr IFSA CICIFSA Key Lab Laser Plasmas MOE Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Phys &

    Astron Collaborat Innovat Ctr IFSA CICIFSA Key Lab Laser Plasmas MOE Shanghai 200240 Peoples R China;

    Shandong Univ State Key Lab Crystal Mat Jinan 250100 Peoples R China;

    Shandong Univ State Key Lab Crystal Mat Jinan 250100 Peoples R China;

    Shanghai Jiao Tong Univ Sch Phys &

    Astron Collaborat Innovat Ctr IFSA CICIFSA Key Lab Laser Plasmas MOE Shanghai 200240 Peoples R China;

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  • 正文语种 eng
  • 中图分类 计量学;光学;
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