Abstract
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 language | English |
|---|---|
| Pages (from-to) | 50-54 |
| Journal | Optical Fiber Technology |
| Volume | 50 |
| Early online date | 2 Mar 2019 |
| DOIs | |
| Publication status | Published - 1 Jul 2019 |
Keywords
- Whispering gallery modes
- Microcavity devices
- Fiber optics sensors
- Multisensor methods