Laser written mirror profiles for open-access fiber Fabry-Pérot microcavities

We demonstrate laser-written concave hemispherical structures produced on the endfacets of optical fibers that serve as mirror substrates for tunable open-access microcavities. We achieve finesse values of up to 250, and a mostly constant performance across the entire stability range. This enables c...

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Bibliographic Details
Published in:arXiv.org 2022-11
Main Authors: Hessenauer, Jannis, Weber, Ksenia, Benedikter, Julia, Gissibl, Timo, Höfer, Johannes, Giessen, Harald, Hunger, David
Format: Article
Language:English
Subjects:
Microcavities
Optical fibers
Stability
Substrates
Online Access:Get full text
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Summary:We demonstrate laser-written concave hemispherical structures produced on the endfacets of optical fibers that serve as mirror substrates for tunable open-access microcavities. We achieve finesse values of up to 250, and a mostly constant performance across the entire stability range. This enables cavity operation also close to the stability limit, where a peak quality factor of \(1.5\times 10^4\) is reached. Together with a small mode waist of \(2.3\; \mathrm{\mu m}\), the cavity achieves a Purcell factor of \(C \sim 2.5\), which is useful for experiments that require good lateral optical access or otherwise large separation of the mirrors. Laser-written mirror profiles can be produced with a tremendous flexibility in shape and on various surfaces, opening new possibilities for microcavities.
ISSN:2331-8422