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| 題名: | Parametric generation and characterization of femtosecond mid-infrared pulses in ZnGeP2 |
| 作者: | 林明緯;Wandel, Scott;Lin, Ming-Wei;Yin, Yanchun;Xu, Guibao;Jovanovic, Igor |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2016-03-07 |
| 上傳時間: | 2026-04-23 12:36:31 (UTC+8) |
| 出版者: | The Optical Society |
| 摘要: | 摘要： Ultrafast mid-infrared (IR) coherent radiation plays an important role in strong-field physics, wherein the use of longer wavelengths has reduced the optical intensities needed to drive light-matter interactions by orders of magnitude in comparison to near-IR radiation. Optimizing parametric interactions for generation and characterization of mid-IR pulses is an enabling step for those applications. We report on the production of >50 µJ femtosecond pulses centered at 5 µm in a two-stage optical parametric amplifier (OPA) based on ZnGeP2, a high-performance optical material in this spectral region. The OPA is pumped by an ultrafast 2-µm source. Amplified pulses have been characterized by parametric upconversion, enabling the use of standard silicon detectors. A numerical model of the system has been developed and tested to control dispersion, group-velocity mismatch, and off-axis parametric fluorescence. The source architecture is suitable for production of mJ-level mid-IR ultrafast pulses without the use of chirped-pulse amplification, where convenient pumping could be realized directly by mid-IR laser sources based on materials such as Cr:ZnSe or Cr:ZnS.Ultrafast mid-infrared (IR) coherent radiation plays an important role in strong-field physics, wherein the use of longer wavelengths has reduced the optical intensities needed to drive light-matter interactions by orders of magnitude in comparison to near-IR radiation. Optimizing parametric interactions for generation and characterization of mid-IR pulses is an enabling step for those applications. We report on the production of >50 µJ femtosecond pulses centered at 5 µm in a two-stage optical parametric amplifier (OPA) based on ZnGeP2, a high-performance optical material in this spectral region. The OPA is pumped by an ultrafast 2-µm source. Amplified pulses have been characterized by parametric upconversion, enabling the use of standard silicon detectors. A numerical model of the system has been developed and tested to control dispersion, group-velocity mismatch, and off-axis parametric fluorescence. The source architecture is suitable for production of mJ-level mid-IR ultrafast pulses without the use of chirped-pulse amplification, where convenient pumping could be realized directly by mid-IR laser sources based on materials such as Cr:ZnSe or Cr:ZnS.
出版日期： 2016-03-07
出處： Optics express, 2016-03, Vol.24 (5), p.5287
資源來源： Optica Publishing Group Journals
識別號： ISSN: 1094-4087
識別號： EISSN: 1094-4087
識別號： DOI: 10.1364/OE.24.005287 |
| 顯示於類別: | [物理學系] 期刊論文
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