---
res:
  bibo_abstract:
  - 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.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Fritz R
      foaf_name: Diorico, Fritz R
      foaf_surname: Diorico
      foaf_workInfoHomepage: http://www.librecat.org/personId=2E054C4C-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0002-4947-8924
  - foaf_Person:
      foaf_givenName: Artem
      foaf_name: Zhutov, Artem
      foaf_surname: Zhutov
      foaf_workInfoHomepage: http://www.librecat.org/personId=0f02ed6a-b514-11ee-b891-8379c5f19cb7
  - foaf_Person:
      foaf_givenName: Onur
      foaf_name: Hosten, Onur
      foaf_surname: Hosten
      foaf_workInfoHomepage: http://www.librecat.org/personId=4C02D85E-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0002-2031-204X
  bibo_doi: 10.1364/optica.507451
  bibo_issue: '1'
  bibo_volume: 11
  dct_date: 2024^xs_gYear
  dct_identifier:
  - UT:001202817000004
  dct_isPartOf:
  - http://id.crossref.org/issn/2334-2536
  dct_language: eng
  dct_publisher: Optica Publishing Group@
  dct_subject:
  - Atomic and Molecular Physics
  - and Optics
  - Electronic
  - Optical and Magnetic Materials
  dct_title: 'Laser-cavity locking utilizing beam ellipticity: accessing the 10<sup>−7</sup>
    instability scale relative to cavity linewidth@'
...