2026-10-14T00:50:34Z https://www.scidb.cn/oai

10.57760/sciencedb.20058 2025-01-17T10:37:52Z

2025-01-17 High temporal contrast 1053 nm femtosecond pulses via spectral broadening and filtering in an air-filled multi-pass cell using a Yb:CALGO amplifier doi:10.57760/sciencedb.20058 en Temporal contrast is crucial for the interaction of ultra intense, ultrashort pulse lasers with matter. Seed laser sources that offer high temporal contrast are essential for enhancing overall temporal contrast. In this study, we demonstrate the generation of a high temporal contrast seed laser by spectral broadening and filtering of a Yb: CALGO femtosecond amplifier in an air-filled multi-pass cell. The temporal contrast exceeds 109 within 100 ps prior to the main pulse, with a pulse energy of 227 µJ and a duration of 118 fs. Given its excellent beam quality and stability, this laser source is well-suited as a high-quality seed for Nd: glass-based ultra intense laser facilities. This work achieves a remarkable internal efficiency of over 70% in generating a clean seed pulse for ultra intense lasers. high temporal contrast seed; laser; ultraintense and ultrafast laser Liya Shen Jiajun Song Yujie Peng Yinfei Liu Guanguang Gao Junze Zhu Tianze Xu Xiaoming Lu Yuxin Leng PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank