Permanent matching of coupled optical bottle resonators with better than 0.16 GHz precision

N.A. Toropov, M. Sumetsky*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The fabrication precision is one of the most critical challenges to the creation of practical photonic circuits composed of coupled high Q-factor microresonators. While very accurate transient tuning of microresonators based on local heating has been reported, the record precision of permanent resonance positioning achieved by post-processing is still within 1 and 5 GHz. Here we demonstrate two coupled bottle microresonators fabricated at the fiber surface with resonances that are matched with a better than 0.16 GHz precision. This corresponds to a better than 0.17 Å precision in the effective fiber radius variation. The achieved fabrication precision is only limited by the resolution of our optical spectrum analyzer and can be potentially improved by an order of magnitude.

Original languageEnglish
Pages (from-to)2278-2281
Number of pages4
JournalOptics Letters
Issue number10
Early online date19 Apr 2016
Publication statusPublished - 10 May 2016

Bibliographical note

© 2016 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.

Funding: Royal Society (WM130110); Horizon 2020 (H2020-EU.1.3.3, 691011); British Council Researcher Links (164861753)


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