US Laser Corp, Laser Marking Systems, Laser Machining Centers, High Power CW Nd:YAG, Pulsed Lasers, marking and industrial laser machine applications

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for your world

High Power CW Nd:YAG Laser

For Laser Cutting, Laser Welding,

Laser Heat Treating and Laser Cladding Applications

U.S. Laser manufactures high power CW Nd YAG laser systems, equipment and machines for laser welding, laser cutting, cladding and heat treating applications


Laser Configuration

Laser Head

At the heart of the system is U.S. Laser's unique laser head. The laser head is a single lamp, single ellipse, close-coupled design, optimized for maximum pumping efficiency.  The design produces up to 700 watts with a small diameter (6.3 mm) rod.  The single lamp reduces consumable costs, while the high efficiency reduces the energy and cooling requirements as well.

The laser head design allows for easy cascading of heads, in a series periodic resonator.  Single and two-head systems are standard, and four-head systems are available. 

An important feature of the design is that it is tunable: the output power can be smoothly varied from <20% to 100% of rated power without any anomalies in the beam characteristics.

U.S. Laser can also provide high brightness variants of the basic lasers, where the maximum power has been slightly reduced to significantly improve the beam quality.  


Power Supply -
 Cooling Console

The electronics and cooling system are housed in a caster-mounted console.  The closed loop cooling system features a proportioning valve controller to maintain constant head temperature, and a high efficiency heat exchanger for connection to external cooling water/chiller.  

The electronics include a high efficiency power supply, and a control unit with status monitoring and protection.  All of these lasers may be computer controlled via digital and analog inputs.  Optional IEEE 488/RS232/RS422 computer interfaces are available. 


Optical Enclosure

The laser heads are contained in an enclosure consisting of a tooling plate base and a hinged, interlocked cover.  An air filtration system provides a clean, positive pressure, environment for the optics, to protect against environmental dust.

The enclosure also includes a beam dump shutter.


Laser Beam Delivery   

U.S. Laser's High Power CW Lasers are available with both conventional and fiber optic beam delivery systems. Particular attention was paid to power handling and transmission capabilitiy to maximize power on target, and minimize optical element heating. All lens elements are fused silica, and are sized based on the full beam diameter or fiber numerical aperture.All surfaces are high damage resistant antireflection coated to provide minimum power loss.


Work Area Enclosure                              

U.S. Laser offers a variety of standard and custom work area enclosures to complement the high power lasers.  CDRH Class I and Class IV enclosures are available.  The laser systems can also be easily integrated into existing CNC or robotic machines. U.S. Laser manufactures high power CW Nd YAG laser systems, equipment and machines for laser welding, laser cutting, cladding and heat treating applications

Fiber Optic Beam Delivery :

Fiber Type                                                      

U.S. Laser offers both step index and gradient index (GRIN) fibers.  The step index fiber produces a top-hat focused spot, whose size stays constant, even when the output power is changed.  The GRIN fiber produces a parabolic profile, with a spot size smaller than a step index fiber.  The choice of fiber type is generally dictated by the needs of the application.  


Optional End Effectors                             

For specific applications, additional accessories can be added to the basic end effector.  For laser welding, a coaxial gas nozzle is available to provide an inert cover gas.  The gas flow is solenoid controlled, through the system computer.  

For laser cutting, the gas nozzle design provides a high velocity gas stream (either inert or assist gas).

A coaxial parfocal CCTV system is available for viewing.

For beam sharing or splitting requirements, a multiplexer module is available.               


The input optics include an upcollimator and focusing lens (in a three-axis) adjustable mount).  The specific lenses are selected to maximize power transmission and minimize beam quality degradation for the specific laser configuration. U.S. Laser's standard end effector is a two stage optical system, incorporating a collimating lens and a focusing lens.  The focusing lenses are easily inter-changeable, for easy variation of spot size and working distance.  


High Power Multimode Lasers

Model #

Max Output

Beam Diameter






404 150 6 12-14
405 250 6 12-16

SpecificationsStandard Laser Configurations

Model Performance






Maximum Output Power (watts)






Recommended Operating Power (watts)






Beam Waist Diameter

< 5 mm

Beam Divergence at Max. Power

< 25 mr

< 30 mr

< 25 mr

< 30 mr

< 30 mr


Number of Heads




Number of Lamps (total)





to 406-2

to 408-2


to 408-4


Computer Controllable




Input Power Requirements

Voltage (3 phase, 50-60 Hz)

208/230 V 440/480 V

Power Consumption

15 kw





Cooling Water Requirements

Temperature (F)

<55 F

<50 F

<50 F

<45 F

<45 F


6 gal/min

10 gal/min

12 gal/min

24 gal/min

Pressure Differential

40-60 psi


Optical Assembly (LxWxH)



Power Supply (WxDxH)




Standard Fiber Optic Beam Delivery

  • Power Transmission: >96% (up to 10 meter length)
  • Focused Spot Size: down to 500 m

Optical Fiber

  • Fiber Type: Step or Gradient Index
  • Core Diameter: 600, 800, or 1000 m
  • Length: 2-20 meters
  • Protection: Armored Jacket
Output Optics (End Effector)
  • Mechanical Size: 1.5" diameter, 6" length
  • Objective Lens Focal Length: 60-100 mm
  • Protection: A.R. Coated Window


  • Gas Assist: Coaxial inert gas (welding); High velocity (cutting)
  • Viewing: Coaxial, Parfocal CCTV
  • Beam Splitting/Sharing Module


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825 Windham Court N. - Wyckoff, NJ 07481

Telephone: (201) 848-9200  -   Fax: (201) 848-9006 


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This page was last modified on: 3/11/2011