Ultrashort Pulse Propagation and Amplification in New Cr-Doped LiSAF and LiCAF Solid State Laser Materials

在激烈的， 超短激光脉冲技术及其应用 由于开发了 掺铬LiSAF和掺铬LiSAF激光材料 LiCAF。 这些材料，像没有其他人还没有 发展，显示最有吸引力的特点 固态激光器所需的材料， 产生超强超短激光脉冲。 它们具有高增益和能量存储特性， 良好的光学性能，高的损伤阈值， 可以大规模种植。 此外，他们独特 联合收割机具有长荧光寿命（对于 LiSAF和130 US为LiCAF）和最广泛的 光谱发射带已知（220 nm， 第一次，让人觉得， 高增益放大，超短（100 fs） 闪光灯泵浦大直径固体脉冲 状态激光模块。 其影响将是 对于未来的超短、高 强度激光技术，在发展 实验室x射线激光，亚皮秒x射线研究， 粒子加速。 我们将全面调查所有 这两种材料的物理特性 由于它们用作超短脉冲的高增益放大器 激光脉冲 这将包括全面审查 Cr掺杂的基本光谱和原子性质 宽带脉冲LiSAF和LiCAF 放大，它们放大短脉冲的能力， 啁啾脉冲 放大（CPA）可以提取能量，而那些 影响其广泛应用的材料特性 孔径，多段阵列（MSA）放大器。 因此，本研究将探讨所有问题， 必须将这些新材料作为 主要激光放大器介质。 数据武装 通过这项研究，我们将能够在未来 工作，朝着建设 能够发射数十甚至数百个 焦耳，时间小于100 fs，可聚焦到 强度大于1020 W/cm 2。

A new avenue of opportunity in the field of intense, ultrashort laser pulse technology and its applications has opened as a result of the development of the laser materials Cr-doped LiSAF and Cr-doped LiCAF. These materials, like no others yet developed, display the most attractive characteristics of a solid state laser material required for the generation of ultra-intense, ultrashort laser pulses. They have high gain and energy storage properties, good optical properties, a high damage threshold and can be grown in large sizes. Moreover, they uniquely combine long fluorescence lifetimes ( 70 us for LiSAF and 130 us for LiCAF) and the broadest spectral emission bandwith known (220nm for LiSAF), making possible, for the first time, the amplification with high gain, of ultrashort ( 100fs) pulses with flashlamp-pumped, large diameter, solid state laser modules. The implications will be considerable for future applications of ultrashort, high intensity laser technology, in the development of laboratory x-ray lasers, sub-picosecond x-ray studies, and particle acceleration. We will make a comprehensive investigation of all the physical properties of these two materials associated with their use as high gain amplifiers of ultrashort laser pulses. This will include a full examination of the basic spectral and atomic properties of Cr-doped LiSAF and LiCAF pertaining to broadband pulse amplification, their capacity to amplify short pulses, the effectiveness with which chirped pulse amplification (CPA) can extract energy, and those material properties affecting their use in wide aperture, multi-segmented array (MSA) amplifiers. This study will therefore address all the issues necessary to incorporate these new materials as a major laser amplifier medium. Armed with data produced by this study, we will then be able, in future work, to move forward towards the construction of lasers capable of emitting tens, perhaps hundreds of joules in times of less than 100fs, focusable to intensities greater than 1020W/cm2.