2026-01-24
Your fiber laser is pumping serious power through double-clad fiber. The core signal looks clean, but something’s heating up downstream. Connectors are running hot. Splices are failing prematurely. The problem isn’t always obvious until you start looking at what’s happening in the cladding.
We manufacture components for high-power fiber systems, and here’s what we see constantly. Engineers focus on core power and forget about the cladding modes carrying unwanted energy. That oversight causes real damage. A quality Cladding Power Stripper isn’t optional in kilowatt-class systems. It’s essential protection for everything downstream.
Double-clad fiber designs pump power through the inner cladding to amplify the core signal. That’s the whole point of the architecture. But not all that pump power gets absorbed by the gain fiber.
Residual pump light stays trapped in the cladding after the gain section. Mode coupling sends some core power into cladding modes too. Imperfect splices create additional cladding light. All this energy has to go somewhere.
The cladding power travels right along with your signal. It doesn’t contribute to your useful output. It just creates problems at every component it encounters.
Fiber connectors aren’t designed to handle significant cladding power. The adhesives holding the fiber in the ferrule absorb this energy and heat up. Temperature rises until the bond fails or the connector face gets damaged.
We’ve seen connectors rated for 10W of core power fail catastrophically with just 2-3W of cladding power present. The damage happens fast once temperatures cross critical thresholds.
Splices face similar issues. The stripped fiber section in a fusion splice absorbs cladding power directly. Coatings char. The glass itself can crack from thermal stress. Your carefully optimized splice suddenly becomes a failure point.
Unstripped cladding power doesn’t disappear magically. It gets absorbed at random points in your system. Usually at the worst possible locations.
Mode field adapters take a hit. Any component with index-matching gel or adhesive becomes a heat sink. Temperature-sensitive components like isolators and modulators experience performance drift or outright failure.
End caps and beam delivery optics really suffer. All that cladding power finally escapes the fiber and dumps into whatever’s nearby. Focusing optics, protective windows, and beam dumps overheat quickly.
A Cladding Power Stripper removes cladding modes before they reach sensitive components. The design uses high-index materials in intimate contact with the fiber cladding.
The cladding modes couple out into the stripping material. This material has excellent thermal conductivity and spreads the heat across a much larger area. Heat sinks or cooling channels then remove the thermal energy in a controlled way.
Your signal in the fiber core passes through completely unaffected. Only the unwanted cladding modes get stripped away. The result is clean fiber output that your downstream components can handle safely.
Low-power systems under 1W total output often get away without dedicated stripping. The small amount of cladding power present doesn’t cause immediate problems.
Once you cross into multi-watt territory, Cladding Power Stripper components become important. At 5W and above, they’re essential. Kilowatt systems absolutely require robust stripping solutions at multiple points in the optical path.
The exact threshold depends on your component quality and how much margin you’ve built into thermal management. But it’s always better to strip early rather than deal with failure later.
Placement matters enormously. You want stripping right after gain stages where residual pump power is highest. Another critical location is immediately before expensive or temperature-sensitive components.
Thermal management determines how much power your Cladding Power Stripper can handle. Passive designs with heat sinks work up to about 20-30W of stripped power. Higher levels need active cooling with water or forced air.
The fiber coating around the stripping section needs attention too. Some designs strip coating locally. Others work with coating intact. Each approach has tradeoffs in power handling and mechanical reliability.
High-power fiber laser systems keep pushing to higher output levels. More power means more residual cladding light to manage. Your components need protection that scales with your system performance.
We manufacture Cladding Power Stripper products because we understand what happens when cladding power goes unmanaged. Component failures. System downtime. Expensive repairs. All preventable with proper stripping solutions.
Your kilowatt-class fiber systems deserve components engineered for the real power levels they’ll encounter. That includes dealing with cladding power before it becomes cladding problems. We’re here to supply the stripping solutions your high-power applications demand.
It varies widely based on system design, but 2-5% of total output power appearing as cladding light is common. For a 1kW laser, that’s 20-50W you need to strip safely.
Yes. Specialized power meters with integrating sphere inputs can measure total fiber output including cladding. Comparing this to core-only measurements reveals cladding power levels.
Quality cladding power stripper designs show minimal core loss, typically under 0.1 dB. The stripping mechanism targets cladding modes specifically while leaving core propagation undisturbed.
When operated within power ratings and with proper cooling, cladding power strippers last the lifetime of your system. Failures usually indicate operation beyond specifications or inadequate thermal management.
