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Novel laser machining of optical fibers for long cavities with low birefringence
journal contribution
posted on 2023-06-09, 07:07 authored by Hiroki TakahashiHiroki Takahashi, Jack Morphew, Fedja OrucevicFedja Orucevic, Atsushi Noguchi, Ezra Kassa, Matthias KellerMatthias KellerWe present a novel method of machining optical fiber surfaces with a CO2 laser for use in Fiber-based Fabry-Perot Cavities (FFPCs). Previously FFPCs were prone to large birefringence and limited to relatively short cavity lengths (= 200 µm). These characteristics hinder their use in some applications such as cavity quantum electrodynamics with trapped ions. We optimized the laser machining process to produce large, uniform surface structures. This enables the cavities to achieve high finesse even for long cavity lengths. By rotating the fibers around their axis during the laser machining process the asymmetry resulting from the laser’s transverse mode profile is eliminated. Consequently we are able to fabricate fiber mirrors with a high degree of rotational symmetry, leading to remarkably low birefringence. Through measurements of the cavity finesse over a range of cavity lengths and the polarization dependence of the cavity linewidth, we confirmed the quality of the produced fiber mirrors for use in low-birefringence FFPCs.
History
Publication status
- Published
File Version
- Published version
Journal
Optics ExpressISSN
1094-4087Publisher
Optical Society of AmericaExternal DOI
Issue
25Volume
22Page range
31317-31328Department affiliated with
- Physics and Astronomy Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2017-07-11First Compliant Deposit (FCD) Date
2017-07-11Usage metrics
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