High repetition rate high power laser system for mid-IR experiments

用于中红外实验的高重复率高功率激光系统

• 批准号: 525701038
• 金额: --
• 依托单位: Friedrich-Alexander-Universität Erlangen-Nürnberg
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2023
• 资助国家: 德国
• 起止时间: 2022-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/525701038?language=en
• 关键词: repetition; rate; power; laser; system

My research goal is to control of the macroscopic properties of complex quantum materials in interaction with ultrashort light pulses. Through this proposal we will establish a novel spectroscopy to address experimentally key aspects on the resonant excitation of mid-IR vibrational and electronic modes for samples in a tailored cryogenic electromagnetic environment. We will implement a multidimensional pump and probe setup capable to measure the time evolution of the optical conductivity of complex quantum materials subsequently to the multiple resonant drive of low energy modes of vibrational, electronic or magnetic nature. In detail here I propose a novel spectroscopic approach capable of measuring small changes in the dielectric function on a broad energy range from 3eV (400nm) to 0,1eV(0,015mm) subsequently to multiple excitation in the mid-IR range. In order to produce adequate laser pulses in the mid-IR and visible we will purchase a laser system capable of delivering ultrashort high energy pulses (energy per pulse>1.5mJ) at high repetition rate (50KHz). The laser pulse produced by the source should be divided into four pulses, one used to generate THz pulses (at 1028 nm), and 3pumping optical parametric amplifiers (OPA) designed to produce intrinsically synchronized pulses tuneable in the visible and mid-IR range. In detail the OPA are: 1) Twin OPA and difference frequency generation to generate CEP mid-IR pulses tuneable between 5-20m (Epp>1µJ from 5 to 15µm); 2) Mid-IR OPA from =2µm to 10µm with Epp>1µJ on all the range; 3) Visible OPA tuneable between 600 and 900nm (pulse duration<30fs). The laser system will deliver independently tuneable mid-IR pulses capable of resonantly drive low energy excitations such as phonon modes, electronic gaps (superconducting and CDW) and spin excitation. Such a source will be the back bone of experiments aimed at controlling the superconducting through multiple photo-excitations. The research unit will allow for the measurements of the response to photo-excitation on a large wavelength range (from 400 to 10000nm) single shot at 40KHz. The shaping of visible light pulses at high repetition rate will enable stochastic based spectroscopy with mid-IR excitations schemes.

我的研究目的是控制复杂量子材料与超短光脉冲相互作用的宏观特性。通过该提案，我们将建立一种新的光谱法，以解决有关在量身定制的低温电磁环境中样品中MID-IR振动和电子模式共振的兴奋的实验关键方面。我们将实施一个多维泵和探测设置，能够测量复杂量子材料的光导率的时间演变，然后以振动，电子或磁性的低能模式的多谐振驱动器。在这里，我提出了一种新型的光谱方法，能够测量旧能量范围的较小变化，从3ev（400nm）到0,1EV（0,015mm），随后在中期IR范围内进行了多种兴奋。为了在MID-IR中产生足够的激光脉冲，我们将购买能够输送的激光系统。以高重复速率（50kHz）以高能量脉冲（每脉冲> 1.5MJ）。源产生的激光脉冲应分为四个脉冲，一种用于生成Thz脉冲（在1028 nm），以及旨在在可见范围内和中IR范围内可调节的本质同步脉冲的3个pumping光学参数放大器（OPA）。详细说明OPA为：1）双OPA和差异频率产生，以产生可调5-20m之间可调（从5到15µm）之间调谐的CEP MID-IR脉冲； 2）MID-IR OPA从= 2µm到10µm，在所有范围内EPP> 1µJ； 3）可见的OPA可调节600至900nm之间（脉冲持续时间<30fs）。激光系统将提供独立可调的MID-IR脉冲，能够共同驱动低能量兴奋，例如声子模式，电子间隙（超导和CDW）和自旋兴奋。这样的来源将是实验的后骨，旨在通过多种光探测来控制超导。研究单元将允许在40kHz的大波长范围内（从400至10000nm）进行对光启动的响应的测量。以高重复速率的可见光脉冲的形状将通过MID-IR兴奋方案实现基于随机的光谱。