Heraeus has filed a patent for a method to produce anti-resonant hollow-core fiber preforms. The process involves preparing anti-resonance element preforms, positioning them in a cladding tube using a template, and hot-forming the assembly. This innovation aims to enhance fiber optics technology. GlobalData’s report on Heraeus gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Heraeus, Ceramic membrane fuel cells was a key innovation area identified from patents. Heraeus's grant share as of January 2024 was 51%. Grant share is based on the ratio of number of grants to total number of patents.

Method for producing anti-resonant hollow-core fiber preform

Source: United States Patent and Trademark Office (USPTO). Credit: Heraeus Holding GmbH

A patent application (Publication Number: US20240034665A1) describes a method for producing a preform of an anti-resonant hollow-core fiber. The method involves providing a cladding tube with a cladding tube inner bore, preparing anti-resonance element preforms, and using a positioning template for arranging the preforms in the tube. The assembly is then processed using a hot-forming process. Additional steps include cutting out the cladding tube to form a counter centering surface, thermally fixing the preforms to the tube wall, and creating a second positioning template for the second end of the tube.

Furthermore, the method includes inserting the preforms through the second positioning template, utilizing centering surfaces for accurate positioning, and preparing a third positioning template with a closing element for further guidance. The method also allows for flame-free thermal connecting and involves various steps such as linking the templates, connecting the closing element, and pushing the preforms into the tube inner bore. Additionally, the method includes the use of gas flow elements in the templates for fluid-conducting purposes. The patent application also covers the production of secondary preforms and anti-resonant hollow-core fibers from the initial preform, highlighting the versatility and potential applications of the described method in fiber optics manufacturing.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies