Saddle-shape Whispering Gallery Mode resonators: µm- to cm- scale

Eyal Yacoby, Yosef London

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Optical Whispering Gallery Mode (WGM) of various sizes and axisymmetry-shapes have been studied and used for a variety of optical sensors. Recently, we suggested a new type of WGM resonators with a saddle shape. These structures consist of two resonators with a bridging region resembling a valley. The unique shape of the saddle-shape resonators may allow the coupling of light into the resonator using a tapered fiber, by placing the tapered fiber at the structural minima point of the valley region. This coupling configuration provides high mechanical stability while maintaining the quality (Q) factor of the joint structured resonator. Here we present saddle shape resonators of various shapes and sizes, suitable for a variety of sensing applications.

Original languageEnglish
Title of host publicationElectro-Optical and Infrared Systems
Subtitle of host publicationTechnology and Applications XX
EditorsDuncan L. Hickman, Helge Bursing, Gary W. Kamerman, Ove Steinvall
ISBN (Electronic)9781510667037
StatePublished - 2023
Externally publishedYes
EventElectro-Optical and Infrared Systems: Technology and Applications XX 2023 - Amsterdam, Netherlands
Duration: 3 Sep 20235 Sep 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceElectro-Optical and Infrared Systems: Technology and Applications XX 2023

Bibliographical note

Publisher Copyright:
© 2023 SPIE. All rights reserved.


  • Mechanical tuning
  • Microsphere
  • Saddle-shape
  • Silica rod resonators
  • Whispering Gallery Modes


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