Abstract

We proposed and designed an ultra-sensitive polymeric waveguide temperature sensor based on an asymmetric Mach–Zehnder interferometer that has different widths in the two interferometer arms. A polymer with a larger thermo-optic coefficient (TOC) was employed to enhance the sensitivity of the waveguide temperature sensor. The influence of the width difference between the two arms and the cladding materials with different TOCs on the sensitivity of the sensor was studied and experimentally demonstrated. The devices were fabricated by using the standard photolithography and simple all-wet etching process. When the cladding material Norland optical adhesive 73 (NOA 73) and the width difference of 6.5 μm were selected, the sensitivity of the waveguide temperature sensor was measured to be 30.8 nm/°C. Moreover, the minimum temperature resolution was about 0.97×103°C. The proposed sensor has the distinct advantages of high sensitivity, high resolution, easy fabrication, low cost, and biological compatibility, which make it have potential applications in temperature detection of organisms, molecular analysis, and biotechnology.

© 2019 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Optical temperature sensor with enhanced sensitivity by employing hybrid waveguides in a silicon Mach-Zehnder interferometer

Xiaowei Guan, Xiaoyan Wang, and Lars H. Frandsen
Opt. Express 24(15) 16349-16356 (2016)

Athermal silicon optical add-drop multiplexers based on thermo-optic coefficient tuning of sol-gel material

Soha Namnabat, Kyung-Jo Kim, Adam Jones, Roland Himmelhuber, Christopher T. DeRose, Douglas C. Trotter, Andrew L. Starbuck, Andrew Pomerene, Anthony L. Lentine, and Robert A. Norwood
Opt. Express 25(18) 21471-21482 (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

Tables (1)

You do not have subscription access to this journal. Article tables 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 (2)

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