Mitigating Mode-Matching Loss in Nonclassical Laser Interferometry

Sebastian Steinlechner, Niels Ole Rohweder, Mikhail Korobko, Daniel Töyrä, Andreas Freise, Roman Schnabel

Research output: Contribution to JournalArticleAcademicpeer-review


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
JournalPhysical review letters
Issue number26
Publication statusPublished - 28 Dec 2018
Externally publishedYes


FundersFunder number
Seventh Framework Programme606176, 339897
Science and Technology Facilities CouncilST/N000633/1


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