Abstract

A high-sensitivity and high-spatial-resolution distributed acoustic sensor based on phase-sensitive optical frequency domain reflectometry ($ \Phi $-OFDR) is proposed. The vibration information is retrieved from the phase change of the complex Rayleigh backscattering. Inner-pulse division and rotating-vector-sum methods are employed to overcome the fading problem and to suppress the crosstalk along the fiber. For the first time, to the best of our knowledge, the waveforms of two simultaneous kilohertz-level vibrations along a 950 m fiber are recovered thanks to the enhanced crosstalk suppression ratio. The spatial resolution of 12 cm and strain resolution of $ 1\,\,{\rm n}\varepsilon /\sqrt {{\rm Hz}} $ are experimentally achieved.

© 2020 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
High-fidelity distributed fiber-optic acoustic sensor with fading noise suppressed and sub-meter spatial resolution

Dian Chen, Qingwen Liu, and Zuyuan He
Opt. Express 26(13) 16138-16146 (2018)

High spatial resolution distributed fiber strain sensor based on phase-OFDR

Jiong Li, Jiulin Gan, Zhishen Zhang, Xiaobo Heng, Changsheng Yang, Qi Qian, Shanhui Xu, and Zhongmin Yang
Opt. Express 25(22) 27913-27922 (2017)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription