High power femtosecond laser system

高功率飞秒激光系统

• 批准号: 526169114
• 金额: --
• 依托单位: Freie Universität Berlin
• 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/526169114?language=en
• 关键词: power; femtosecond; laser; system

A high-power femtosecond laser system (high-power laser system for short) is applied for that delivers ultrashort light pulses at a fixed wavelength in the spectral range from 400 nm to 2000 nm without further devices. The pulse width shall be between 30 fs and 400 fs with a repetition rate of at least 1 kHz. Preferably, the repetition rate can be changed up to 100 kHz. At the same time, the output power shall not drop. At 1 kHz repetition rate, the individual light pulses must have at least 2.5 mJ in the range from 375 nm to 850 nm, must have at least 3 mJ in the range from 850 nm to 1500 nm, and must have more than 3 mJ in the range from 1500 nm to 2000 nm. The spatial mode TEM00 of the light pulses must be better than M2 < 1.3. With these specifications, nonlinear OPAs and NOPAs can be operated to produce tunable femtosecond light pulses in the range of 270 nm to 15000 nm. These light pulses must have energies in the range of µJ so that pump-probe spectroscopy experiments can be performed with multiple beam copies (sample and reference beams). Polarization-resolved UV/VIS-pump IR-probe spectroscopy and IR-pump IR-probe spectroscopy are a major focus here. For this reason, quotes were also solicited from vendors with specifications of OPAs that can be driven with the high-power laser systems to demonstrate these capabilities. The high-power laser system should be as easy to operate as possible (turn-key), it should require as little maintenance as possible, and it should have the lowest possible overall energy consumption (sustainability). The high-power laser system is to be purchased as a replacement for a defective high-power laser system that had been used successfully for many years in high utilization. It delivered light pulses with 2.5 mJ energy at a repetition rate of 1 kHz and a pulse length of about 60 - 80 fs.

高功率飞秒激光系统（简称高功率激光系统）在400 ~ 2000 nm的光谱范围内提供固定波长的超短光脉冲，无需进一步的器件。脉冲宽度应在30fs至400fs之间，重复频率至少为1khz。最好，重复频率可以改变到100千赫。同时，输出功率不得下降。在1khz的重复频率下，单个光脉冲在375 nm到850 nm的范围内必须至少有2.5 mJ，在850 nm到1500 nm的范围内必须至少有3 mJ，在1500 nm到2000 nm的范围内必须有超过3 mJ。光脉冲的空间模TEM00必须优于M2 < 1.3。有了这些规格，非线性opa和nopa可以在270 nm到15000 nm范围内产生可调谐的飞秒光脉冲。这些光脉冲的能量必须在µJ范围内，这样泵浦探测光谱实验才能用多个光束副本（样品和参考光束）进行。偏振分辨紫外/可见光泵浦红外探针光谱和红外泵浦红外探针光谱是这里的主要焦点。出于这个原因，还向供应商征求了可由高功率激光系统驱动的opa规格的报价，以展示这些能力。高功率激光系统应该尽可能容易操作（交钥匙），它应该需要尽可能少的维护，它应该具有最低的整体能耗（可持续性）。购买高功率激光系统是为了替换已经在高利用率中成功使用多年的有缺陷的高功率激光系统。它以1千赫的重复频率和约60 - 80秒的脉冲长度传输2.5 mJ能量的光脉冲。