Thermo-optic Tuning of a Packaged Whispering Gallery Mode Resonator Filled with Nematic Liquid Crystal

Authors

Vishnu Kavungal, Technological University DublinFollow
Gerald Farrell, Technological University DublinFollow
Qiang wu, Technological University DublinFollow
Arun Mallik, Technological University DublinFollow
Yuliya Semenova, Technological University DublinFollow

Document Type

Article

Rights

Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Disciplines

2. ENGINEERING AND TECHNOLOGY, Electrical and electronic engineering

Publication Details

Vol. 26, No. 7 | 2 Apr 2018 | OPTICS EXPRESS 8431

Abstract

Thermo-optic tuning of whispering gallery modes (WGMs) in a nematic liquid crystal-filled thin-walled capillary tube resonator is reported. WGMs were excited by the evanescent field from a tapered optical fiber. Tapered optical fiber fabrication and reduction of wall thickness of the capillary tube was carried out by a ceramic micro-heater brushing technique. A simple and robust packaging technique is demonstrated to ensure stable and repeatable operation of the device. Tunability of WGMs with temperature was demonstrated with a sensitivity of 267.5 ± 2.5 pm/°C. The demonstrated thermo-optic method for WGMs tuning is potentially useful for many tunable photonic devices and sensors.

DOI

https://doi.org/10.1364/OE.26.008431

Recommended Citation

Kavangul, V., Farrell, G. & Qiang, W. (2018). Thermo-optic tuning of a packaged whispering gallery mode resonator filled with nematic liquid crystal. Optics Express, vol. 26, no. 7, pp. 8431-8442. doi: 10.1364/OE.26.008431.