Multi-octave, CEP-stable source for high-energy field synthesis

利用倍频程超连续谱产生锁模皮秒脉冲

Mode-locked picosecond pulse generation from an octave-spanning supercontinuum

利用1550 nm泵浦的倍频程超连续谱光源，通过光谱分割和再放大，获得了1110 nm附近的皮秒锁模脉冲。1110 nm的脉冲是近transform-limited，与1.7 ps的持续时间超过其1.2 nm的带宽，并表现出高的脉冲间相干。超连续谱光源和脉冲合成系统都完全在光纤中实现。多功能源的建设表明，脉冲合成切片超连续谱可能是一个有用的技术在1000 - 2000 nm的波长范围。

中红外多倍频程超连续谱

Multi-octave supercontinuum from mid-IR filamentation in bulk

在超连续谱产生中，各种传播效应结合起来产生了具有深远可能性的强超短光脉冲的显著光谱展宽。不同的应用对光源特性提出了高度不同和具有挑战性的要求，例如从紫外（UV）到可见光（VIS）到近红外（NIR）和中红外（MIR）的光谱覆盖范围。对于许多应用而言，发射到发射的可重复性、高光谱能量密度、不存在复杂或非确定性脉冲分裂也是必不可少的。在这里，我们提出了一个“多合一”的解决方案，第一个超连续光谱在批量覆盖最宽的带宽从刚刚超过紫外线远到中红外线。该光谱跨越三个以上的倍频程，具有高光谱能量密度（每纳米3 pJ至10 nJ），具有高的逐次再现性，并且是载波到包络相位（CEP）稳定的。我们的方法，基于飞秒MIR脉冲在反常色散制度的激励，允许一类新的简单和紧凑的超连续谱源。

级联非简并四波混频技术合成可见光和紫外高功率单周期脉冲

Cascaded Nondegenerate Four-Wave Mixing Technique for High-Power Single-Cycle Pulse Synthesis in the Visible and Ultraviolet Ranges

我们提出了一种新的技术来合成高功率单周期脉冲在可见光和紫外光范围内的相干叠加的多频带倍频程跨越光谱获得的高度非简并级联四波混频的飞秒脉冲在体各向同性非共振介质。实验证明，使用薄熔融石英幻灯片的相干光谱跨越两个倍频程的带宽的产生。使用频率分辨光学门控，其中多个级联的订单已被同时测量的第一次，干预多色字段的充分表征，支持直接合成近单周期2.2 fs的可见光-UV脉冲的可能性，而无需重复复杂的振幅或相位控制，这应该使许多应用在科学和技术。

A six-octave optical frequency comb from a scalable few-cycle erbium fiber laser

A compact and robust coherent laser light source that provides spectral coverage from the ultraviolet to infrared is desirable for numerous applications, including heterodyne super resolution imaging[1], broadband infrared microscopy[2], protein structure determination[3], and standoff atmospheric trace-gas detection[4]. Addressing these demanding measurement problems, laser frequency combs[5] combine user-defined spectral resolution with sub-femtosecond timing and waveform control to enable new modalities of high-resolution, high-speed, and broadband spectroscopy[6-9]. In this Letter we intro…

Stably accessing octave-spanning microresonator frequency combs in the soliton regime

Microresonator frequency combs can be an enabling technology for optical frequency synthesis and timekeeping in low size, weight, and power architectures. Such systems require comb operation in low-noise, phase-coherent states such as solitons, with broad spectral bandwidths (e.g., octave-spanning) for self-referencing to detect the carrier-envelope offset frequency. However, stably accessing such states is complicated by thermo-optic dispersion. For example, in the Si3N4 platform, precisely dispersion-engineered structures can support broadband operation, but microsecond thermal time constant…

High-energy mid-infrared sub-cycle pulse synthesis from a parametric amplifier

High-energy, carrier-envelope phase (CEP)-stable, sub-cycle, mid-infrared (mid-IR) pulses can provide unique opportunities of exploring phase-sensitive strong-field light-matter interactions in atoms, molecules, and solids. In the mid-IR wavelength, the ponderomotive energy of laser pulses is dramatically increased (versus the visible/near-infrared) and, therefore, the Keldysh parameter is much smaller than unity even at relatively modest laser intensities. This enables to study the sub-cycle electron dynamics in solids via high-harmonic generation (HHG) without damage. One can also control th…