{"acknowledgement":"We thank Rishabh Sahu and Sebastian Wald for technical contributions to the experiment. Funding by Institute of Science and Technology Austria.","file_date_updated":"2024-01-17T08:53:16Z","type":"journal_article","date_updated":"2024-01-17T08:53:47Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa_version":"Published Version","doi":"10.1364/optica.507451","department":[{"_id":"OnHo"}],"article_type":"original","status":"public","keyword":["Atomic and Molecular Physics","and Optics","Electronic","Optical and Magnetic Materials"],"_id":"14802","file":[{"content_type":"application/pdf","file_id":"14824","relation":"main_file","checksum":"eb99ca7d0fe73e22f121875175546ed7","file_name":"2023_Optica_Diorico.pdf","date_created":"2024-01-17T08:53:16Z","creator":"dernst","access_level":"open_access","success":1,"date_updated":"2024-01-17T08:53:16Z","file_size":4558986}],"publication_status":"published","date_created":"2024-01-15T10:25:38Z","month":"01","license":"https://creativecommons.org/licenses/by/4.0/","publisher":"Optica Publishing Group","publication":"Optica","issue":"1","publication_identifier":{"issn":["2334-2536"]},"ddc":["530"],"citation":{"ista":"Diorico FR, Zhutov A, Hosten O. 2024. Laser-cavity locking utilizing beam ellipticity: accessing the 10<sup>−7</sup> instability scale relative to cavity linewidth. Optica. 11(1), 26–31.","mla":"Diorico, Fritz R., et al. “Laser-Cavity Locking Utilizing Beam Ellipticity: Accessing the 10<sup>−7</sup> Instability Scale Relative to Cavity Linewidth.” <i>Optica</i>, vol. 11, no. 1, Optica Publishing Group, 2024, pp. 26–31, doi:<a href=\"https://doi.org/10.1364/optica.507451\">10.1364/optica.507451</a>.","short":"F.R. Diorico, A. Zhutov, O. Hosten, Optica 11 (2024) 26–31.","ama":"Diorico FR, Zhutov A, Hosten O. Laser-cavity locking utilizing beam ellipticity: accessing the 10<sup>−7</sup> instability scale relative to cavity linewidth. <i>Optica</i>. 2024;11(1):26-31. doi:<a href=\"https://doi.org/10.1364/optica.507451\">10.1364/optica.507451</a>","apa":"Diorico, F. R., Zhutov, A., &#38; Hosten, O. (2024). Laser-cavity locking utilizing beam ellipticity: accessing the 10<sup>−7</sup> instability scale relative to cavity linewidth. <i>Optica</i>. Optica Publishing Group. <a href=\"https://doi.org/10.1364/optica.507451\">https://doi.org/10.1364/optica.507451</a>","chicago":"Diorico, Fritz R, Artem Zhutov, and Onur Hosten. “Laser-Cavity Locking Utilizing Beam Ellipticity: Accessing the 10<sup>−7</sup> Instability Scale Relative to Cavity Linewidth.” <i>Optica</i>. Optica Publishing Group, 2024. <a href=\"https://doi.org/10.1364/optica.507451\">https://doi.org/10.1364/optica.507451</a>.","ieee":"F. R. Diorico, A. Zhutov, and O. Hosten, “Laser-cavity locking utilizing beam ellipticity: accessing the 10<sup>−7</sup> instability scale relative to cavity linewidth,” <i>Optica</i>, vol. 11, no. 1. Optica Publishing Group, pp. 26–31, 2024."},"title":"Laser-cavity locking utilizing beam ellipticity: accessing the 10<sup>−7</sup> instability scale relative to cavity linewidth","intvolume":"        11","article_processing_charge":"Yes","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"has_accepted_license":"1","date_published":"2024-01-20T00:00:00Z","volume":11,"quality_controlled":"1","year":"2024","abstract":[{"lang":"eng","text":"Frequency-stable lasers form the back bone of precision measurements in science and technology. Such lasers typically attain their stability through frequency locking to reference cavities. State-of-the-art locking performances to date had been achieved using frequency modulation based methods, complemented with active drift cancellation systems. We demonstrate an all passive, modulation-free laser-cavity locking technique (squash locking) that utilizes changes in spatial beam ellipticity for error signal generation, and a coherent polarization post-selection for noise resilience. By comparing two identically built proof-of-principle systems, we show a frequency locking instability of 5×10<jats:sup>−7</jats:sup> relative to the cavity linewidth at 10 s averaging. The results surpass the demonstrated performances of methods engineered over the last five decades, potentially enabling an advancement in the precision control of lasers, while creating avenues for bridging the performance gaps between industrial grade lasers with scientific ones due to the afforded simplicity and scalability."}],"oa":1,"author":[{"first_name":"Fritz R","orcid":"0000-0002-4947-8924","last_name":"Diorico","full_name":"Diorico, Fritz R","id":"2E054C4C-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Artem","last_name":"Zhutov","full_name":"Zhutov, Artem","id":"0f02ed6a-b514-11ee-b891-8379c5f19cb7"},{"id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","full_name":"Hosten, Onur","last_name":"Hosten","orcid":"0000-0002-2031-204X","first_name":"Onur"}],"day":"20","language":[{"iso":"eng"}],"page":"26-31"}