Packaged inline cascaded optical micro-resonators for multi- parameter sensing

Vishnu Kavungal, Gerald Farrell, Qiang Wu, Arun Kumar Mallik, Changyu Shen, Yuliya Semenova

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
4 Downloads (Pure)


A novel design principle and fabrication method for whispering gallery mode optical multiple-resonator arrays have been proposed and demonstrated. The proposed design involves an inline cascade of optical micro-resonators (ICOMRs) coupled to multiple tapered sections along a single optical fiber. The multiple micro-resonators can be used for sensing of several parameters or a single parameter at multiple locations simultaneously. A simple and robust packaging technique has been developed ensuring stable and repeatable operation of the device. In order to demonstrate the capability of simultaneous multi- parameter sensing of the proposed ICOMRs structure, strain and temperature measurements were carried out using an inline cascade of two cylindrical micro-resonators: a tapered polymer optical fiber based micro-cylinder and a polydimethylsiloxane coated silica cylindrical micro-resonator. An Axial tensile strain sensitivity of 1.4 ± 0.04 pm/με and temperature sensitivity of 330 ± 18 pm/°C have been demonstrated experimentally. The proposed ICOMRs design has many potential applications in distributed sensing, lab-on-a-fiber technology and optical communications.
Original languageEnglish
Pages (from-to)50-54
JournalOptical Fiber Technology
Early online date2 Mar 2019
Publication statusPublished - 1 Jul 2019


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