J-Fiber Jena

Superior products - based on the vast experience in the development and manufacturing of optical fiber technologies and the resources and stability of the LEONI group

Our business
j-fiber is one of the leading suppliers of optical fibers for data transmission networks. We are the partner and fiber source to the large cable manufacturers. Our core business is the manufacturing of high-performance Multimode fibers specifically for LAN and data center cabling applications.


Since 2007 j-fiber and its subsidiary j-plasma GmbH are part of the LEONI Group, a worldwide supplier of systems and solutions for wire, cable and on-board-systems. j-fiber belongs to LEONI Business Unit Fiber Optics. As competence center for ultra-pure fused silica and preforms, j-fiber enables fiber optic specialty solutions for the OEM clients of BU Fiber Optics in industry, optics, sensor technologies and optical analysis, science, data communications as well as research.

Competence and Experience
In more than 30 years of company history in the research and manufacturing of optical fibers and preform technologies at our Jena location, we combine the pioneering optics works of Carl Zeiss, Ernst Abbe and Otto Schott with leading know-how in optical glass and fiber manufacturing.

Process technologies and manufacturing competence
Superior raw materials and final optical fiber products – it is all based on a unique combination of process technology, competence and resources of j-fiber group in Jena: high-volume fiber draw capacities for volume manufacturing of optical fibers; j-fiber MCVD (Modified Chemical Vapor Deposition), PBVD (Plasma Based Vapor Deposition) and fused silica melting technologies for ultra-pure raw materials and state- of-the-art preform designs.

Quality management, environment protection and operational safety
j-fiber GmbH and j-plasma GmbH have been certified according to DIN ISO 9001 and 14001 and in addition we have been successfully audited according to EMAS III and fulfill the RoHS and REACH safety regulations.

Further j-fiber is approved as QPL listed supplier and product approved by the US Department of Defense according to their MIL-STD 790 (Facility Certification) and MIL-PRF-49291 (Product Certification).



j-fiber GmbH
Im Semmicht 1
D-07751 Jena, Germany

Tel: +49-3641-352 100
Fax: +49-3641-352 101