{"title":"High temporal contrast 1053 nm femtosecond pulses via spectral broadening and filtering in an air-filled multi-pass cell using a Yb:CALGO amplifier.","authors":"Liya Shen, Jiaming Jiang, Jiajun Song, Yujie Peng, Yinfei Liu, Guanguang Gao, Junze Zhu, Tianze Xu, Xiaoming Lu, Yuxin Leng","doi":"10.1364/OL.556024","DOIUrl":null,"url":null,"abstract":"<p><p>Temporal contrast is crucial for the interaction of ultraintense, 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 (MPC). The temporal contrast exceeds 10<sup>9</sup> 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 ultraintense laser facilities. This work achieves a remarkable internal efficiency of over 70% in generating a clean seed pulse for ultraintense lasers.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 7","pages":"2398-2401"},"PeriodicalIF":3.1000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.556024","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
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Abstract
Temporal contrast is crucial for the interaction of ultraintense, 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 (MPC). 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 ultraintense laser facilities. This work achieves a remarkable internal efficiency of over 70% in generating a clean seed pulse for ultraintense lasers.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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