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Journal Articles Advanced Engineering Materials Year : 2024

Internal Ceramic Protective Coating of Hollow‐Core Fibers

Abstract

In order to optimize the use of hollow-core photonic crystal fibers (HC-PCF), their cores are filled with an atomic gas for an ultra-enhanced interaction with an incident laser beam in applications such as atomic vapor microcells. One challenge in these gas-filled HC-PCFs is to control the physio-chemical interactions between the gas medium and the silica inner-surface of the fiber core-surround. This work thus focuses on the processing of ceramic coatings on glass substrates by chemical solution deposition. It also describes the successful implementation of an original coating procedure for a deposition inside hollow-core fibers with complex microstructures. It is indeed possible to form a thin, dense, inorganic and amorphous layer with a low thickness, low roughness and high transparency. To obtain such a result, several parameters must be controlled, including the concentration of the solution, the technique and the deposition time, as well as the heat treatment undergone by the fiber. In particular, the selected aluminosilicate coatings, which are non-porous and present a 20 to 30 nm thickness, demonstrated a considerable improvement of the lifetime properties of the fibers filled with rubidium vapor, without modifying its original guiding properties.
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Origin : Publication funded by an institution

Dates and versions

hal-04574276 , version 1 (14-05-2024)

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Jenny Jouin, Philippe Thomas, Heloïse Orihuel, Elodie de Sousa, Yann Launay, et al.. Internal Ceramic Protective Coating of Hollow‐Core Fibers. Advanced Engineering Materials, 2024, pp.20302209. ⟨10.1002/adem.202302209⟩. ⟨hal-04574276⟩
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