
Fiber Assemblies
Custom-Tailored Precision for Diverse Applications.
Custom-tailored optical fibers optimized for a multitude of applications, including UV curing, spectroscopy, and fiber-optic flame detection. We prioritize quality and offer solutions for various wavelengths with the certified assurance of ISO 9001:2015.
Quality Through Controlled Production Processes
Quality is the most critical indicator for fiber optic applications. Adherence to specifications must be guaranteed at every step of production. By using high-grade raw materials and continuously training our employees who control the key positions in the production process, we can guarantee consistently high quality. In a personal consultation with our sales team, the appropriate fiber and technology are individually selected for your application. They are always manufactured with high-end technology and optimized for the highest quality.
ISO 9001 is the globally recognized standard for quality management. Certification confirms that a company:
- Documented processes have
- Quality systematically monitored
- Continuously improved
- Customer requirements reliably met
For you as a customer, this means specifically: Every cable is manufactured and tested according to the same documented procedures, regardless of whether it is a single piece or a series.

Diverse Application Possibilities
Manufacturing is carried out according to your specifications and requirements. The result is optical fibers that are optimally designed for a variety of applications:
- UV curing, quality control applications, astronomy and medicine, spectroscopy in industry and medicine, light transmission for welding, soldering, and marking, measurement and sensors in laboratory equipment or harsh environments, fiber-optic flame detection.
We offer solutions for UV wavelengths from 200 nm to 1200 nm, NIR wavelengths from 1100 nm to 2200 nm, and special solutions for visible wavelengths.
UV curing is a process in which liquid materials (adhesives, varnishes, coatings) harden within seconds using ultraviolet light. Optical fibers precisely transport the intense UV light from the lamp to the curing area, even in hard-to-reach places. You might be familiar with this from the dentist: there, UV light cures composite fillings via an optical fiber. But the process is also widely used in electronics manufacturing and the printing industry.

Light is measured in nanometers (nm). The smaller the number, the more energetic the light:
- 200-380 nm: Ultraviolet (UV). Invisible, used for curing and disinfection.
- 380-700 nm: Visible light (violet to red).
- 700-1200 nm: Near-infrared (NIR). For heat measurement and spectroscopy.
Different fiber optic materials transmit different wavelengths optimally. We select the appropriate material for your application.

Manufacturing Process
To ensure our light guides and fiber optic products meet the highest standards, we rely on a specialized manufacturing process. This allows us to guarantee exceptional chemical and tactile robustness so they can perform optimally in their respective environments. Precision is a critical factor in this, true to our motto: “Making the impossible happen.”
Materials Used
- Borosilicate: Glass with high temperature resistance and chemical resilience.
- PMMA (Polymethylmethacrylate): A thermoplastic, lightweight plastic with high light transmittance.
- Silica-Hard Clad: A robust plastic coating for improved strength and durability.
- Silica-Silica for UV and NIR Wavelengths: Our specialized glass fibers, optimized for the transmission of light in the ultraviolet (UV) and near-infrared (NIR) ranges.
PMMA is a thermoplastic material, known under brand names such as Plexiglas or acrylic glass. In fiber optics, PMMA is used for:
- Flexible, cost-effective fiber optic cables are used
- Large core diameters (up to several millimeters)
- Applications using visible light
PMMA fibers are less temperature-resistant than glass fibers (max. 70-100°C), but significantly more flexible and less expensive. This makes them a particularly good choice for lighting or sensors where extreme temperatures are not present.

Borosilicate (also called “boron glass”) is a special type of glass with a high boron oxide content. It is the same material used to make heat-resistant laboratory glassware and baking molds. In fiber optics, it offers:
- Excellent chemical resistance to acids and alkalis
- Good temperature resistance up to approximately 400-500°C
- Low thermal expansion (less stress during temperature changes)
Ideal for standard industrial applications and lighting.

Optional Specifications:
- Various apertures available
- Polarization can be maintained
- Anti-reflection coating possible
- Various lengths, diameters, bending radii, converters, and vacuum feedthroughs optional
- Various connectors and ferrules suitable for industry and medicine
SMA (Sub-Miniature A) is a standard screw-type connector for fiber optic cables, designed for laboratory equipment and spectrometers. The connector has a 1/4″-36 thread. FSMA is the fiber optic version with a specially protected ferrule for the sensitive fiber end face. Standardized connectors allow you to connect our cables directly to your equipment, or we can manufacture custom connectors for your specific application.

Silica-silica fibers consist entirely of high-purity quartz glass (silicon dioxide), both the core and the cladding. This construction offers:
- Extremely high temperature resistance up to 1000°C
- Optimal transmission in the UV range (below 300 nm)
- Excellent transmission in the NIR range (1000-2500 nm)
- Minimal absorption losses
Therefore, these fibers are primarily used in high-performance lasers, UV curing, and spectroscopy.

POF | PMMA Fibers and Applications
Our light guides are suitable for a variety of applications where precise light transmission and color fidelity are essential, such as:
- High-performance cables
- Pure silica bundles
- Connectors, FSMA, SMA, etc.
- Custom-specific ferrules
- Metal parts
- Tapered fibers
- Custom-tailored solutions
- Fibers
… and much more!
Do you require further information, a customized quote, or expert consultation for your project? We are at your disposal at any time.

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.





