Abstract

A sensing system is proposed for quantitative measurement of large-range dynamic nanostrain based on a phase-sensitive optical time domain reflectometer, where the coherent detection and I/Q demodulation methods are employed to demodulate both the phase and the amplitude of the Rayleigh scattering light in real time. A nanopositioning translation stage is utilized to apply precise nanostrain to fiber. By measuring phase differences between two adjacent sections, the quantitative nanostrain with a large measurement range is demonstrated; this is also a method to measure the strain parameter of refractive index. For the Panda polarization-maintaining fiber under test in the experiment, the strain parameter of phase difference is measured to be 8.714  mrad/(·m), while the strain parameter of refractive index is measured to be 0.3751ε1. As a proof of the concept, the dynamic strain sensing with a range of 10–1000 nε is experimentally demonstrated, and the strain resolution is 1 or 2 , corresponding to 5 or 2.5 m spatial resolution, respectively. The experimental measurement also shows a triangular wave with a 12-Hz vibrating frequency and a 100-nε strain amplitude as well as a 188-Hz resonant signal of the tensile section.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
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)

Phase-sensitive optical time-domain reflectometric system based on a single-source dual heterodyne detection scheme

Miao Yu, Minhan Liu, Tianying Chang, Jinpeng Lang, Jiandong Chen, and Hong-Liang Cui
Appl. Opt. 56(14) 4058-4064 (2017)

High-resolution distributed shape sensing using phase-sensitive optical time-domain reflectometry and multicore fibers

Łukasz Szostkiewicz, Marcelo A. Soto, Zhisheng Yang, Alejandro Dominguez-Lopez, Itxaso Parola, Krzysztof Markiewicz, Anna Pytel, Agnieszka Kołakowska, Marek Napierała, Tomasz Nasiłowski, and Luc Thevenaz
Opt. Express 27(15) 20763-20773 (2019)

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 (7)

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 (14)

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