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Ultraintense few-cycle infrared laser generation by fast-extending plasma grating
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作者 Zhaoli Li Yanlei Zuo +5 位作者 Xiaoming Zeng Zhaohui Wu Xiaodong Wang Xiao Wang Jie Mu bilong hu 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2023年第1期1-7,共7页
Ultraintense short-period infrared laser pulses play an important role in frontier scientific research,but their power is quite low when generated using current technology.This paper demonstrates a scheme for generati... Ultraintense short-period infrared laser pulses play an important role in frontier scientific research,but their power is quite low when generated using current technology.This paper demonstrates a scheme for generating an ultraintense few-cycle infrared pulse by directly compressing a long infrared pulse.In this scheme,an infrared picosecond-to-nanosecond laser pulse counterpropagates with a rapidly extending plasma grating that is created by ionizing an undulated gas by a short laser pulse,and the infrared laser pulse is reflected by the rapidly extending plasma grating.Because of the high expansion velocity of the latter,the infrared laser pulse is compressed in the reflection process.One-and two-dimensional particle-in-cell simulations show that by this method,a pulse with a duration of tens of picoseconds in the mid-to far-infrared range can be compressed to a few cycles with an efficiency exceeding 60%,thereby making ultraintense few-cycle infrared pulses possible. 展开更多
关键词 INTENSE CYCLE scheme
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Laser compression via fast-extending plasma gratings
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作者 Zhaohui Wu Yanlei Zuo +9 位作者 Xiaoming Zeng Zhaoli Li Zhimeng Zhang Xiaodong Wang bilong hu Xiao Wang Jie Mu Jingqin Su Qihua Zhu Yaping Dai 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2022年第6期19-28,共10页
A method is proposed for compressing laser pulses by fast-extending plasma gratings(FEPGs),which are created by ionizing a hypersonic wave generated by stimulated Brillouin scattering in a background gas.Ionized by a ... A method is proposed for compressing laser pulses by fast-extending plasma gratings(FEPGs),which are created by ionizing a hypersonic wave generated by stimulated Brillouin scattering in a background gas.Ionized by a short laser pulse,the phonon forms a light-velocity FEPG to fully reflect a resonant pump laser.As the reflecting surface moves with the velocity of light,the reflected pulse is temporally overlapped and compressed.One-and two-dimensional fully kinetic particle-in-cell simulations with a laser wavelength of 1μm show that in this regime,a pump pulse is compressed from 10–40 ps to 7–10 fs(i.e.,a few optical cycles),with a two-dimensional transfer efficiency up to 60%.This method is a promising way to produce critical laser powers while avoiding several significant problems that arise in plasma-based compressors,including an unwanted linear stage,major plasma instabilities,and the need for seed preparation. 展开更多
关键词 PUMP SCATTERING COMPRESSOR
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A cylindricalÖffner stretcher based on ternary reflector for femtosecond petawatt-level laser system
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作者 李伟 王逍 +6 位作者 左言磊 洪义麟 胡必龙 吴朝辉 母杰 周凯南 曾小明 《Chinese Optics Letters》 SCIE EI CAS CSCD 2023年第7期69-73,共5页
A cylindricalÖffner stretcher based on ternary reflector(COSTER)is proposed and analyzed.Compared with the traditionalÖffner stretcher,the COSTER has no off-axis aberration in the multipass configuration,and... A cylindricalÖffner stretcher based on ternary reflector(COSTER)is proposed and analyzed.Compared with the traditionalÖffner stretcher,the COSTER has no off-axis aberration in the multipass configuration,and the output laser of COSTER has lower spectral phase noise and higher temporal contrast in the far field.The COSTER is quite suitable to be used in multipetawatt laser facilities,and it might be the preferred stretcher configuration for ultrafast and ultra-intense lasers. 展开更多
关键词 cylindrical Offner stretcher aberration temporal contrast
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压缩聚焦过程中的波前畸变对远场时空分布影响 被引量:3
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作者 胡必龙 王逍 +6 位作者 李伟 曾小明 母杰 左言磊 王晓东 吴朝辉 粟敬钦 《光学学报》 EI CAS CSCD 北大核心 2020年第11期216-222,共7页
针对超高峰值功率激光系统中脉冲的压缩及聚焦过程进行建模,基于光线追迹法和夫琅禾费衍射方法对平行光栅对压缩器的色散过程和抛物面镜的聚焦过程进行了模拟分析,同时采用Square-Radial多项式对方形口径的波前畸变进行描述,分析了近场... 针对超高峰值功率激光系统中脉冲的压缩及聚焦过程进行建模,基于光线追迹法和夫琅禾费衍射方法对平行光栅对压缩器的色散过程和抛物面镜的聚焦过程进行了模拟分析,同时采用Square-Radial多项式对方形口径的波前畸变进行描述,分析了近场存在4种不同波前畸变情况时对远场时空分布的影响,定量给出了不同情况下波前畸变误差的允许范围。 展开更多
关键词 超快光学 脉冲压缩 超快激光 衍射光栅 波前畸变 时空特性
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