Laser

Application

The precision and reliability of high-power industrial lasers are closely linked to the control of the operating temperatures of the resonator (laser source) and the optical components (lenses) used to focus the laser beam. The high-performance WRA LASER process chillers have been specifically designed for cooling laser systems and help achieve three key objectives: maintaining a precise wavelength, ensuring optimal laser beam focusing, and reducing thermal stress on components.

Laser overheating problems

Modern laser machines are subject to significant power fluctuations due to the variability of processing cycles. Therefore, without appropriate cooling, the thermal loads generated by the resonator’s power electronics can lead to a range of undesirable effects:

Reduced machining accuracy due to beam focusing problems caused by overheating of the active medium
Power fluctuations aiming instability
Reduced life cycle of the laser unit due to rapid aging caused by overheating of key system components
Lower overall optical conversion efficiency due to the increased wavelength of the beam

Precision and reliability

The WRA LASER process liquid chillers have been specifically designed and developed to meet the cooling requirements of industrial laser systems. All WRA LASER units are equipped with the LASERPACK ±0.5K control system, which integrates a hot gas bypass valve for cooling capacity regulation and an advanced microprocessor controller with an enhanced PI algorithm, ensuring a standard temperature stability of ±0.5K under variable load conditions.

Two Independent Temperature Levels
The dual cooling-circuit version is equipped with a modulating three-way valve and a second pump dedicated to the optics hydraulic circuit. This option makes it possible to independently control the operating temperature of the laser source and the optics, helping to maintain beam alignment on the workpiece during the machining process.
LASERPACK ±0.1K Ultra-High Precision Version
This configuration includes high-precision temperature sensors and dedicated controller parameter settings, enabling the system to limit deviations from the target temperature to ±0.1K stability (under stable load conditions).
Corrosion Protection
The hydraulic circuit and the standard non-ferrous pump (stainless steel/polymers) are resistant to corrosion, preserve the purity of the process fluid, and protect the laser source and optical components from contamination-related issues.
Maximum Reliability
Every unit is individually factory-tested and undergoes comprehensive functional testing. The use of high-quality components ensures long-term reliability, eliminating downtime and minimizing production stoppages.

What do cosmotec products offer?

The WRA LASER Cosmotec chillers are an optimal solution for cooling laser machines. They are designed to operate continuously and reliably and comply with the highest energy efficiency standards defined by the Ecodesign ErP 2021 regulation.

Cosmotec chillers can meet the most varied application needs as they offer numerous options and configurations.

Energy Efficiency: All liquid chillers comply with the limits required by the ErP2021 regulations – SEPR HT (EU) 2016/2281 and SEPR MT (EU) 2015/1095.
Suitable for Outdoor Installation: The electrical panel, designed in compliance with EN 60204 standards and featuring an IP54 protection rating, allows all units to be installed outdoors.
Corrosion Protection: The HDPE plastic tank, hydraulic circuit, and non-ferrous pump (stainless steel/polymers), all resistant to corrosion, help preserve the purity of the process fluid.
LASERPACK configurations with precision levels of ±0.5K and ±0.1K
Dual cooling circuit independent control of source and optics operating temperatures
High-efficiency plate evaporators in AISI316
Condensers with Aluminum Fins and Copper Microchannel Tubes (-20% refrigerant charge)
Electronic Expansion Valve
High-Efficiency EC Brushless Axial Fans
Inverter centrifugal pumps
Standard automatic hydraulic bypass valve
Dynamic setpoint with standard ambient probe
Compatibility with ethylene glycol (EGW) or propylene glycol (PGW) solutions, offering corrosion and frost protection.
Compatibility with deionised (DI) water: DI cartridge filter for maintaining system resistivity available on request
50/60 Hz dual-frequency versions
60 Hz UL versions

Application areas

Laser: CO₂, disc, diode, fibre, YAG
Cut
Welding
Engraving
Drilling
Coating (superficial application of material)
Marking
Additive manufacturing processes such as 3D printing

Perfect cosmotec products for this application

Air conditioning

Refrigeration

Ventilation

Heat exchangers

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