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A high-performance liquid cooling heat dissipation component different from traditional milled/grooved water cooling plates, specially designed for high-power fiber lasers and optical communication modules)
1. Definition and Core Structure
Definition:
Groove‑free does not mean no flow channels. Instead of adopting the traditional process of mechanical milling/grooving plus cover plate welding, it is an optical fiber water cooling plate with integrated sealed flow channels realized through processes such as Friction Stir Welding (FSW), diffusion bonding, or embedded copper tubes. The flow channels are embedded inside the metal substrate with no groove marks on the surface, achieving extremely high overall flatness.
Internal flow channels: serpentine / parallel microchannels, embedded copper tubes, with no exposed notches;
Inlet and outlet water connectors (G1/4, NPT, etc.), sealing structure (FSW solder-free sealing to prevent leakage);
Surface treatment: anodizing (corrosion protection), conductive oxidation, nickel / tin plating (to meet different installation requirements).
2. Working Principle
The flat bottom surface of the cooling plate is closely attached to heat sources such as pump sources, beam combiners, and laser cavities of fiber lasers via thermal grease or phase change materials.
Heat is rapidly conducted through the high-thermal-conductivity substrate to the internal flow channel walls.
Deionized water or ethylene glycol aqueous solution (commonly used) circulates inside the flow channels and removes heat through forced convection.
The hot fluid returns to the Cooling Distribution Unit (CDU) or chiller for heat exchange and cooling, forming a closed-loop cooling system.
The groove‑free structure reduces thermal resistance interfaces, improves heat transfer efficiency, and avoids stress concentration and corrosion risks at groove edges.
3. Mainstream Manufacturing Processes
Friction Stir Welding (FSW, most widely used): Pre-set flow channel space between two plates; solid-state welding achieved through thermo‑mechanical effects generated by a high-speed rotating stirring tool. It features no porosity or cracks, no solder required, minimal deformation, and is suitable for large‑size, high‑load fiber optic water cooling plates.
Embedded copper tube + vacuum brazing: Pre-fabricated copper tubes embedded into blind holes of the substrate, with gaps filled via vacuum brazing to form seamless flow channels.
Diffusion bonding: Metallic atomic bonding achieved under high temperature and pressure, suitable for ultra‑thin and ultra‑precision flow channels but at relatively high cost.
4. Performance Advantages and Comparison (vs. Traditional Milled Groove Water Cooling Plates)
Comparison Item
Groove‑Free Fiber Optic Water Cooling Plate
Traditional Milled Groove Water Cooling Plate
Surface Flatness
Extremely high (≤0.05 mm/100 mm), gap-free attachment
Sealing test: helium leak detection (leak rate ≤1×10⁻⁹ mbar·L/s) to ensure no leakage during long-term operation.
6. Typical Application Scenarios
High-power fiber lasers: heat dissipation for pump modules, beam combiners, Q-drives in 1 kW–10 kW industrial cutting/welding lasers;
Optical communication equipment: high-speed optical modules in data centers, coherent communication equipment, EDFA amplifiers;
Medical laser equipment: fiber laser beauty devices, dental laser equipment;
Semiconductor manufacturing: fiber transmission systems in laser annealing and laser dicing equipment.
7. Selection and Design Guidelines
Heat source distribution: serpentine flow channels for uniform distribution, parallel flow channels for multiple heat source points;
Flow rate and pressure: ensure flow velocity ≥1 m/s to avoid local overheating;
Material selection: aluminum alloy for general scenarios, copper for ultra-high heat flux density;
Interface and compatibility: confirm specifications and positions of water inlet/outlet connectors to match existing chillers / CDUs;
Environmental requirements: enhanced surface corrosion protection (e.g., hard anodizing) for outdoor / humid environments;
Compliance: meet CE and RoHS; pressure testing required for high-pressure applications.
8. Maintenance Recommendations
Replace coolant regularly (every 6–12 months) to prevent scaling;
Conduct pressure testing and helium leak detection annually to check for leaks;
Keep the cooling plate surface clean to avoid oil contamination impairing thermal conductivity;
Avoid severe impact and vibration to prevent flow channel deformation.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
2006
Total Annual:
1,500,000-2,500,000
Employee Number:
138~168
Ecer Certification：
Verified Supplier
Uchi was established in 2006 in Dongguan, China.
After years of development, Uchi has become a large scale hi-tech enterprise that specialized in development and production of complete series of MOV,PTC, NTC series, PPTC series, Fuse(ALL TYPE),Resistor、integrated circuit 、 Capacitor, ... Uchi was established in 2006 in Dongguan, China.
After years of development, Uchi has become a large scale hi-tech enterprise that specialized in development and production of complete series of MOV,PTC, NTC series, PPTC series, Fuse(ALL TYPE),Resistor、integrated circuit 、 Capacitor, ...
