Abstract

We demonstrated an ultra-compact and highly sensitive temperature sensor by using an in-fiber Mach–Zehnder interferometer (MZI) with side-opened channels. The MZI was constructed by off-center splicing a thin piece of microstructured optical fiber (MOF) between two single-mode fibers. Then, two side-opened channels were drilled through the MOF along the transverse direction by using a femtosecond laser to let the liquid with a high thermo-optic coefficient enter into the air cavity of the MZI. Due to the large effective refractive index (RI) difference between the core mode and the cavity mode excited by the offset splicing point, the scale of the MOF-based MZI can be reduced to several hundred micrometers. Experimental results show that the MOF-based MZI infiltrated with isopropanol has a temperature sensitivity up to 3.8 nm/°C with small strain cross-sensitivity of 0.0001 °C/μϵ in the temperature range of 22°C–34°C, which makes it a competitive fiber sensor in highly sensitive temperature sensing applications, including healthcare and consumer electronics.

© 2017 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Highly sensitive temperature sensor based on a polymer-infiltrated Mach–Zehnder interferometer created in graded index fiber

Fengchan Zhang, Xizhen Xu, Jun He, Bin Du, and Yiping Wang
Opt. Lett. 44(10) 2466-2469 (2019)

Highly-sensitive gas pressure sensor using twin-core fiber based in-line Mach-Zehnder interferometer

Zhengyong Li, Changrui Liao, Yiping Wang, Lei Xu, Dongning Wang, Xiaopeng Dong, Shen Liu, Qiao Wang, Kaiming Yang, and Jiangtao Zhou
Opt. Express 23(5) 6673-6678 (2015)

Ultra-highly sensitive gas pressure sensor based on dual side-hole fiber interferometers with Vernier effect

Hongfeng Lin, Fufei Liu, Huiyong Guo, Ai Zhou, and Yutang Dai
Opt. Express 26(22) 28763-28772 (2018)

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