Fiber Optics for Industry & Science: Cables, Assemblies & Sensors
Delivering light exactly where you need it. Bespoke fiber optic assemblies and bundles for demanding applications. Engineered in Germany.
Discover our solutions Organize a consultationCustom-Tailored Fiber Optic Solutions
Welcome to your leading global provider of custom-tailored fiber optic solutions. As specialists in multimode fibers and advanced manufacturing technologies, we develop individual solutions based on your specific project requirements. Extensive industry knowledge of the fibers available on the market, paired with the maximum precision of mechanical components with eccentricity deviations of <15µm, forms the foundation of our expertise and quality. This allows us to guarantee reliable and highly efficient customer solutions in the fiber optics sector.
Schedule a ConsultationWhy FOS Inon Fiber Optics?
Global Partnership
By your side, worldwide. We are an internationally operating company with a global network of partners. No matter where you are located, we are there for you and will support you with your projects.
Custom-Tailored Solutions
Fiber optic cables individually tailored to your project. Our experts are happy to advise you and will work with you to develop the optimal solution for your project.
Highest Quality
We use state-of-the-art tools and technologies in the manufacturing of our fiber optic cables. Our products undergo strict quality controls to ensure they meet our high standards.
Reliability
Solutions that deliver what they promise. Our fiber optic solutions are robust, durable, and reliable. You can count on our products to function flawlessly even under demanding conditions.
Expertise
Benefit from our expert knowledge and our many years of experience in the fiber optics industry. Our team of experts is happy to advise you and will support you in the planning and implementation of your projects.
Our Fiber Optic Solutions
From custom fiber bundles to sub-15µm precision mechanical parts—we build the optical backbone for the world’s most demanding industries.

About FOS Inon Fiber Optics
FOS Inon Optics is a medium-sized, owner-managed manufacturer of fiber optic cables from Germany, based in Niederschelden-Siegen. FOS Inon Optics has always manufactured sophisticated, custom-specific fiber optic cables for sectors such as power plants, fiber-optic flame detection, spectroscopy and microscopy, quality control, UV curing, as well as for other lighting and laser applications.
The family-owned company successfully focuses on niche products in the laser and analytics industries. Its business success is based on investments in state-of-the-art equipment, experienced and highly qualified employees with excellent technical knowledge, and the “Made in Germany” quality standard. The history of this young company proves that traditional values and developments combined with modern technologies guarantee high-quality products.
With the help of high-end tools, we achieve top quality. Whether you need radiation-resistant optical fibers in special lengths or temperature-resistant variants, trust in our expertise and benefit from our highly developed system for maximum accuracy in your project.
Contact UsApplication Examples of our High-Performance Fibers
FOS stands for uncompromising precision, long service life and reproducible quality, developed and manufactured in Germany for the highest demands.
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Reliability doesn’t happen by chance.
At FOS Inon Optics, quality is not just a promise—it is a standard that can be measured. Our development and manufacturing processes for fiber-optic systems are ISO 9001:2015 certified. This establishes the foundation for reliable performance, reproducible results, and trust wherever optical precision is critical.







