Abstract

The performance of sensors, including optical fiber sensors, is commonly limited by the tradeoff between a large dynamic range and a high resolution. In this Letter, in order to optimize both, we propose an inline multimode interferometer sensor based on a suspended-core microstructured optical fiber. Due to the existence of multiple pairs of mode interferences, the transmission spectrum of the interferometer consists of dense fringes modulated by a lower envelope. Since these mode interferences take place in the uniform material with the same length, the dense fringes and the lower envelope have an identical sensing response without crosstalk. Hence, the sensor integrates the large dynamic range of the lower envelope and the high resolution of the dense fringes. Strain-sensing performance is investigated to validate the characteristic of the large dynamic range and the high resolution of the proposed sensor. The dynamic range, theoretically 0–9200 µɛ, is 12 times larger than for the dense fringes, and the resolution is 17.5 times higher than for the lower envelope.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
High-sensitivity gas pressure sensor based on a multimode interferometer using hollow-core tube lattice fiber

Zhengyong Li, Changrui Liao, Yatao Yang, Ying Wang, and Yiping Wang
Opt. Lett. 45(16) 4571-4574 (2020)

High-resolution, large dynamic range fiber-optic thermometer with cascaded Fabry–Perot cavities

Guigen Liu, Qiwen Sheng, Weilin Hou, and Ming Han
Opt. Lett. 41(21) 5134-5137 (2016)

Simultaneous measurement of temperature and strain based on a hollow core Bragg fiber

Yu Wang, Yan Zhou, Xinyu Wang, Daru Chen, Zhenggang Lian, Chao Lu, and Hwa-Yaw Tam
Opt. Lett. 45(22) 6122-6125 (2020)

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 Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica 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 Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica 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 Optica member, or as an authorized user of your institution.

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

Equations (2)

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

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

Metrics