Mitigating Mode-Matching Loss in Nonclassical Laser Interferometry

Sebastian Steinlechner*, Niels-Ole Rohweder, Mikhail Korobko, Daniel Toyra, Andreas Freise, Roman Schnabel

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Strongly squeezed states of light are a key technology in boosting the sensitivity of interferometric setups, such as in gravitational-wave detectors. However, the practical use of squeezed states is limited by optical loss, which reduces the observable squeeze factor. Here, we experimentally demonstrate that introducing squeezed states in additional, higher-order spatial modes can significantly improve the observed nonclassical sensitivity improvement when the loss is due to mode-matching deficiencies. Our results could be directly applied to gravitational-wave detectors, where this type of loss is a major contribution.

Original languageEnglish
Article number263602
Number of pages5
JournalPhysical Review Letters
Volume121
Issue number26
DOIs
Publication statusPublished - 28 Dec 2018
Externally publishedYes

Keywords

  • SQUEEZED VACUUM STATES
  • ALIGNMENT

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