{"title":"111 W picosecond Ho:YAG amplifier and its application to 10 μm mid-infrared generation.","authors":"Jinwen Tang, Xiaoxiao Hua, Minglang Wu, Wenhao Cheng, Zhitai Zhou, Baoquan Yao, Tongyu Dai, Xiaoming Duan","doi":"10.1364/OL.574416","DOIUrl":null,"url":null,"abstract":"<p><p>In this Letter, we report a high-power picosecond Ho:YAG amplifier system delivering an average output power exceeding 111 W at a repetition rate of 10 kHz, achieving an overall gain of 93 dB, with beam quality characterized by <i>M</i><sup>2</sup> values of 1.53 and 1.65 in two orthogonal directions and highly stable operation (1.7% RMS fluctuation). To the best of our knowledge, this represents the highest average power demonstrated thus far for a 2-μm picosecond laser amplifier. Utilizing this robust amplifier as a pump source, we further developed a ZnGeP<sub>2</sub> (ZGP) optical parametric generator (OPG) for mid-infrared radiation, successfully achieving direct emission at 10.1 μm with an output power of 123 mW under a pump power of 16 W. Notably, this work demonstrates the first direct 10 μm generation from a ZGP-based OPG.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 19","pages":"6161-6164"},"PeriodicalIF":3.3000,"publicationDate":"2025-10-01","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.574416","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
In this Letter, we report a high-power picosecond Ho:YAG amplifier system delivering an average output power exceeding 111 W at a repetition rate of 10 kHz, achieving an overall gain of 93 dB, with beam quality characterized by M2 values of 1.53 and 1.65 in two orthogonal directions and highly stable operation (1.7% RMS fluctuation). To the best of our knowledge, this represents the highest average power demonstrated thus far for a 2-μm picosecond laser amplifier. Utilizing this robust amplifier as a pump source, we further developed a ZnGeP2 (ZGP) optical parametric generator (OPG) for mid-infrared radiation, successfully achieving direct emission at 10.1 μm with an output power of 123 mW under a pump power of 16 W. Notably, this work demonstrates the first direct 10 μm generation from a ZGP-based OPG.
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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