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- Title
Laser chirp controlled relativistic few-cycle mid-infrared pulse generation.
- Authors
Dongao Li; Guobo Zhang; Jie Zhao; Yanting Hu; Yu Lu; Hao Zhang; Qianni Li; Dongze Zhang; Rong Sha; Fuqiu Shao; Zhengming Sheng; Tongpu Yu
- Abstract
Relativistic few-cycle mid-infrared (mid-IR) pulses are unique tools for strong-field physics and ultrafast science, but are difficult to generate with traditional nonlinear optical methods. Here, we propose a scheme to generate such pulses with high efficiency via plasma-based frequency modulation with a negatively chirped laser pulse (NCLP). The NCLP is rapidly compressed longitudinally due to dispersion and plasma etching, and its central frequency is downshifted via photon deceleration due to the enhanced laser intensity and plasma density modulations. Simulation results show that few-cycle mid-IR pulses with the maximum center wavelength of 7.9 µm and pulse intensity of aMIR = 2.9 can be generated under a proper chirp parameter. Further, the maximum energy conversion efficiency can approach 5.0%. Such a relativistic mid-IR source is promising for a wide range of applications.
- Subjects
MID-infrared lasers; LASER plasmas; PLASMA diffusion; LASER pulses; LASERS; EXERCISE intensity; SUPERCONTINUUM generation
- Publication
High Power Laser Science & Engineering, 2023, Vol 11, p1
- ISSN
2095-4719
- Publication type
Article
- DOI
10.1017/hpl.2023.51