Dynamic fabrication method of SNAP microresonators

Abstract

Surface Nanoscale Axial Photonics (SNAP) technology has demonstrated the record subangstrom fabrication precision of optical microresonators and resonant photonic circuits at the optical fiber surface. However, fabrication errors arising from fluctuations of temperature, inscription parameters, alignment inconsistencies, and other factors did not allow researchers to achieve the subangstrom precision without sophisticated postprocessing. Here we show that the key fabrication method of SNAP structures – CO2 laser beam optical fiber annealing – suffers from significant fiber displacements which may introduce a few percent fabrication errors. To suppress the effects of misalignment, we develop a dynamic fabrication method employing a translating beam exposure and demonstrate its excellent precision. The effective fiber radius variation of ~ 10 nm is introduced with an error of ~ 0.1 angstrom. We suggest that the remaining fabrication errors can be attributed to laser power fluctuations.

Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
Aston University (General)
Publication ISSN: 1539-4794
Last Modified: 05 May 2025 07:26
Date Deposited: 02 May 2025 14:18
PURE Output Type: Article
Published Date: 2025-04-01
Accepted Date: 2025-04-01
Authors: Wang, Zijie
Crespo-Ballesteros, Manuel (ORCID Profile 0000-0002-0592-4726)
Collins, Christopher
Yang, Yong
Zhang, Qi
Zhang, Xiaobei
Sumetsky, Michael (ORCID Profile 0000-0001-7289-3547)

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