Generation of midwave- and longwave infrared few-cycle multi-mJ pulses for the study of soliton-induced ultrafast nonlinear phenomena in atomic and molecular gases by using dielectric-coated metallic hollow-core fibers

使用电介质涂层金属空心光纤生成中波和长波红外少周期多 mJ 脉冲，用于研究原子和分子气体中孤子引起的超快非线性现象

• 批准号: 443415906
• 负责人: Dr. Uwe Griebner
• 金额: --
• 依托单位: Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (MBI)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/443415906?language=en
• 关键词: Generation; midwave; longwave; infrared; few

The project aims at the use of an already existing novel multi-mJ ultrashort pulse midwave IR (MWIR) OPCPA system (3 mJ, 5 micrometers) operating at 1 kHz and its extension to longer wavelengths in the longwave IR (LWIR) range (covering 7-12 micrometers) for the study of nonlinear processes in dielectric-coated metallic hollow-core fibers (DM-HCF). This unique laser source and the exploration of DM-HCFs grant access to a new segment of mid-IR nonlinear optics, e.g., to investigate new spectral and temporal regimes and ultrafast nonlinear processes in the anomalous dispersion range hitherto inaccessible in other waveguides. In particular solitonic phenomena in the 5-12 micrometers spectral range for distortion-less soliton pulse delivery, few-cycle soliton self-compression and soliton-induced supercontinuum generation will be studied from both a theoretical and experimental perspective. The individual goals are:(1) Extending the existing few-cycle MWIR OPCPA system for the generation of ultrashort pulses in the range of 7-12 micrometers, enabling pulse energies in the mJ-range. (2) Theoretical and experimental study of DM-HCFs for MWIR and LWIR pulse self-compression in the anomalous dispersion regime. In the considered wavelength range from 5-12 micrometers an unrivaled new compression technique is expected. Furthermore, DM-HCFs allow the compression of pulses with much higher energy compared to glass HCFs. (3) Theoretical and experimental study of supercontinuum generation in DM-HCFs filled with a gas using the high-energy MWIR and LWIR pulses. The application of such pump pulses should allow the generation of extremely broadband supercontinua extending into the THz spectral range.(4) Distortion-less soliton propagation of MWIR and LWIR pulses in gas-filled DM-HCFs will be studied in dependence on wavelength and pulse energy. Solitons in the targeted wavelength range between 3-12 micrometers have not been realized yet. (5) Generation of high-energy THz pulses in gases by using the two-color pulse technique. One can expect that with millijoule pulses in the MWIR and LWIR the THz yield will be increased by up to two orders of magnitude compared to near-IR pump pulses.

The project aims at the use of an already existing novel multi-mJ ultrashort pulse midwave IR (MWIR) OPCPA system (3 mJ, 5 micrometers) operating at 1 kHz and its extension to longer wavelengths in the longwave IR (LWIR) range (covering 7-12 micrometers) for the study of nonlinear processes in dielectric-coated metallic hollow-core fibers (DM-HCF).这种独特的激光源以及DM-HCFS授予对MID-IR非线性光学元件的新段的访问，例如，研究在其他波导中无法接触的异常分散范围内的新频谱和时间状态以及超快的非线性过程。在5-12微米光谱范围内，尤其将从理论和实验的角度研究，在5-12微米光谱范围内用于无失真的孤子脉冲递送，几乎没有循环的孤子自我压缩和孤子诱导的超脑生成。单个目标是：（1）扩展现有的几个周期MWIR OPCPA系统，以在7-12微米的范围内生成超短脉冲，从而在MJ范围内启用脉冲能。 （2）在异常分散方案中，DM-HCFS的MWIR和LWIR脉冲自我压缩的理论和实验研究。在考虑到5-12微米的考虑波长范围内，预计无与伦比的新压缩技术。此外，与玻璃HCF相比，DM-HCF可以压缩能量更高的脉冲。 （3）使用高能量MWIR和LWIR脉冲填充气体的DM-HCF中超脑产生的理论和实验研究。这种泵脉冲的应用应允许生成非常宽带的超弯曲，以扩展到THZ光谱范围。（4）将在充满气体的DM-HCF中的MWIR和LWIR脉冲的无失真孤子传播，以依赖波长和脉冲能量。尚未实现在3-12微米之间的目标波长范围内的孤子。 （5）使用两色脉冲技术在气体中产生高能量Thz脉冲。可以预期，与近IR泵脉冲相比，使用MWIR和LWIR中的Millijoule脉冲将增加多达两个数量级。