Polarization separation assisted optomechanical time-domain analysis with submeter resolution

Dexin Ba, Zijie Hua, Yijia Li, Yongkang Dong

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Optomechanical time-domain analysis (OMTDA) is a novel approach to measure distributed acoustic impedance of surrounding media with a high spatial resolution based on coherent forward stimulated Brillouin scattering probing. However, the spatial resolution is still limited by the polarization noise and influence of activation pulse. In this Letter, we propose a polarization separation based OMTDA to further improve the resolution. By isolating the acoustic activation and probing process in orthogonal polarization states, the backward Brillouin scattering of an activation pulse is effectively suppressed. Accompanied with the reduced polarization fluctuation brought by polarization-maintaining fiber, a spatial resolution of 0.8 m is experimentally demonstrated over a 34-m-long fiber and the precise distinction between air and alcohol is realized.

Original languageEnglish
Pages (from-to)5886-5889
Number of pages4
JournalOptics Letters
Issue number23
StatePublished - 1 Dec 2021
Externally publishedYes

Bibliographical note

Funding Information:
National Key Scientific Instrument and Equipment Development Projects of China (2017YFF0108700).

Publisher Copyright:
© 2021 Optica Publishing Group.


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