{"title":"100 W orbital angular momentum laser at 2 µm.","authors":"Heng Ding, Zihao Tong, Changsheng Zheng, Tianxiang Meng, Wenlong Wei, Lei Zhu, Yinyin Wang, Dazhi Lu, Yongguang Zhao, Haohai Yu, Huaijin Zhang","doi":"10.1364/OL.551090","DOIUrl":null,"url":null,"abstract":"<p><p>Direct power scaling of an at-source scalar orbital angular momentum (OAM) laser is demonstrated in a Ho:YAG single-crystal fiber (SCF). Benefiting from the long gain region and the large surface-to-volume ratio of this fiber-like geometric structure, a 100 W optical vortex laser (OAM = <i>ℏ</i>) with a high slope efficiency of 66.0% is achieved at 2.1 µm, which is, to the best of our knowledge, the record power of the at-source OAM laser in the 2 µm spectral range and opens a new route for direct generation of high-power, high-efficiency structure light beams.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 5","pages":"1661-1664"},"PeriodicalIF":3.1000,"publicationDate":"2025-03-01","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.551090","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}
引用次数: 0
Abstract
Direct power scaling of an at-source scalar orbital angular momentum (OAM) laser is demonstrated in a Ho:YAG single-crystal fiber (SCF). Benefiting from the long gain region and the large surface-to-volume ratio of this fiber-like geometric structure, a 100 W optical vortex laser (OAM = ℏ) with a high slope efficiency of 66.0% is achieved at 2.1 µm, which is, to the best of our knowledge, the record power of the at-source OAM laser in the 2 µm spectral range and opens a new route for direct generation of high-power, high-efficiency structure light beams.
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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