Northwestern University Robert R. McCormick School of Engineering and Applied Science

Advanced Manufacturing Processes Laboratory

Laser Surface Texturing System

RAPID Lumera Laser

  • Capable of micro-machining virtually any material

  • High precision control and flexibility

  • Diode pumped Nd:YVO4 picosecond laser

  • 2W average power at 1064 nm

  • Second harmonics at 532 nm

  • High pulse energy - up to 30 µJ

  • High peak power of up to 20 MW

  • Beam quality: M²<1.2

  • Repetition rate: 10 KHz to 500 KHz

5 DOF Positioning System

  • Linear axes resolution of 10nm

  • Rotary axes resolution of 0.0001 degrees

Waterjet-Guided Laser Processing System

The entire setup consists of three main systems. Two axes air bearing positioning system for moving the samples. High-pressure waterjet system forms the micro waterjet by transferring air pressure to water pressure and then pumping the water through a diamond orifice. SPI fiber laser is selected to couple with the waterjet. Fig. 1 shows the entire design of the system for water-jet guided laser processing.

Fig. 1. Overall design of the waterjet-guided Laser Processing

PIglide Precision Air Bearing Stages

  • Travel Range: 100x100 mm

  • Maximum Velocity: 1 m/s

  • Maximum Acceleration: Up to 1 g

  • Accuracy: ± 5 μm

  • Repeatability: ± 0.5 μm

MAXPRO Air Driven Pump

  • Maximum Water Pressure: 450 MPa

  • Air Pressure Input: 0-0.56 MPa

  • Magnification Ratio: 796:1

SPI G4 Pulsed Fibre Laser

  • Average Power: >70W

  • Wavelength: 1070 nm

  • Frequency: 70-1000 kHz

  • Pulse Width Range: 10-500 ns

  • Beam Quality (M2):<1.6