Can this jumper cable transmit high-power lasers for laser welding?
Yes, “large-core” energy fiber patch cords are specifically designed for transmitting high-power lasers (including industrial and medical applications such as laser welding, laser cutting, and laser marking).
From the perspective of optical physics and engineering design, the reason they can transmit the high power required for laser welding (typically hundreds to thousands of watts) depends on the following core technical principles:
1. Large-Core Design Reduces Power Density
The lasers used in laser welding have extremely high energy. If ordinary single-mode fibers (with a core diameter usually only 9 $\mu$m) are used, the extremely high power concentrated on a tiny cross-sectional area will cause the power density (unit: W/cm^2) to far exceed the damage threshold of quartz glass, instantly burning out the fiber (the “fiber fuse” effect).
- Large-Core fibers typically have core diameters of 100 $\mu$m, 200 $\mu$m, 400 $\mu$m, 600 $\mu$m, or even 1000 $\mu$m and above. According to the formula P/A (power/area), increasing the cross-sectional area by tens to tens of thousands of times can significantly reduce the optical power density inside the fiber and at the end face, allowing kilowatt-level (kW) lasers to pass safely.
2. Coupling with Multi-Mode Laser Beams
Semiconductor lasers (Diode Lasers) or solid-state lasers used for welding have a larger numerical aperture (NA) and relatively lower beam quality (M^2). Large-core fibers, as multi-mode fibers, have a larger light-receiving area and a larger numerical aperture, enabling efficient coupling of high-power lasers into the fiber core.
3. Special Structural Design for High-Power Energy Patch Cords
To withstand the extreme power of welding lasers, these patch cords have fundamental structural differences from ordinary communication patch cords:
- Epoxy-Free / Air-Gap Process: High-power laser irradiation will instantly carbonize and burn ordinary curing adhesives. Therefore, high-power energy patch cords (such as D80, high-power SMA905 connectors) typically use an epoxy-free, air-gap design at the ferrule end face, or employ special metal sealing processes.
- Heat Dissipation and Metal Ferrules: Ferrules made of materials with excellent thermal conductivity, such as copper, stainless steel, or gold-plated metal, are usually used to quickly dissipate excess heat generated by scattering or absorption.
- Endcap Technology: An endcap made of coreless quartz is fused to the output end of the fiber. This causes the laser light to diverge physically before reaching the interface between the fiber and air, reducing the light intensity at the end face and preventing micro-dust in the air from sintering on the end face and damaging the fiber.
OFSCN® Product Information
Energy fiber patch cords for industrial high-power laser welding (e.g., kW-level processing) are not part of OFSCN®'s core product line.
OFSCN®'s core R&D and product focus is on Fiber Bragg Grating (FBG) sensors, specialty optical fibers (high-temperature, high-strength, small-diameter fibers), and fiber optic sensing network systems.
However, in terms of specialty connectors and high-reliability, temperature-resistant components, OFSCN® provides the following related basic device support:
- OFSCN® 120℃ Fiber Optic Connector: Supports customization of various fiber optic connectors including SMA905, FC, and ST, with a maximum operating temperature of 120℃.
- OFSCN® 200℃ Fiber Optic Connector: Offers stainless steel construction and special temperature-resistant material encapsulation, supporting high-reliability connections like SMA905, with an operating temperature of up to 200℃.
Note: If you need to perform industrial-grade laser welding transmission at tens of thousands or thousands of watts, it is recommended to use industrial D80 / SMA905 water-cooled energy fiber patch cords specifically designed for high-power laser transmission.