克服单周期激光源脉冲能量瓶颈的高效可扩展方案
Efficient and scalable scheme for overcoming the pulse energy bottleneck of single-cycle laser sources
AI总结：
提出先进双啁啾光学参量放大方案，采用两种非线性晶体克服单周期中红外激光脉冲能量瓶颈，实验实现53 mJ输出和6 TW峰值功率，为单周期MIR脉冲最高值，并有望应用于多TW亚周期脉冲。
摘要：
我们提出了一种名为先进双啁啾光学参量放大（DC-OPA）的新方案，该方案采用两种非线性晶体（BiB$_3$O$_6$和掺MgO铌酸锂）来克服单周期中红外（MIR）激光脉冲在脉冲能量可扩展性方面的瓶颈。在实验中，先进DC-OPA方案实现了载波包络相位稳定的MIR激光脉冲，其带宽超过一个倍频程（1.4-3.1 $μ$m），输出脉冲能量为53 mJ。脉冲持续时间被压缩至8.58 fs，对应于中心波长2.44 $μ$m的1.05个周期，峰值功率为6 TW。据我们所知，所获得的脉冲能量和峰值功率是单周期MIR激光脉冲光学参量放大所达到的最高值。得益于先进DC-OPA方案的能量可扩展性，它有望应用于多TW亚周期激光脉冲。
英文摘要：
We propose a novel scheme called advanced dual-chirped optical parametric amplification (DC-OPA) that employs two kinds of nonlinear crystals (BiB$_3$O$_6$ and MgO-doped lithium niobate) to overcome the bottleneck of pulse energy scalability for single-cycle mid-infrared (MIR) laser pulses. In experiments, the advanced DC-OPA scheme achieved carrier-to-envelope phase-stable MIR laser pulses for a bandwidth of over one octave (1.4-3.1 $μ$m) with an output pulse energy of 53 mJ. The pulse duration was compressed to 8.58 fs, which corresponds to 1.05 cycles with a central wavelength of 2.44 $μ$m and peak power of 6 TW. To our knowledge, the obtained values for the pulse energy and peak power are the highest achieved for optical parametric amplification of single-cycle MIR laser pulses. Thanks to the energy scalability of the advanced DC-OPA scheme, it is potentially applicable to multi-TW sub-cycle laser pulses.
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