Laboratory of laser microtechology is equipped many different lasers which are used mainly in laser technology applications of solid material treatment. Below is a list of them:
- Nd:YAG laser Quanta Ray Pro 250, Spectra Physics
- Excimer laser COMPex Pro 205F, Coherent
- Nd:YAG laser „Valentino“ (an integral part of a laser micro-technological system)
- Nd:YAG laser Solar W-50
- Semiconductor laser “Bělásek”, Kvant
Quanta Ray Pro 250 (manufacturer Spectra Physics, Inc.)
Type of laser: pulsed laser based on Nd:YAG crystal, lamp pumped
Wavelengths: 1064 nm, 532 nm, 355 nm
Beam profile: circled ø ~10 mm, “approximately” Gauss profile
Range of parameters:
Pulse-length: ~ 20 ns
Pulse energy (maximum): ~ 300 mJ (na vlnovej dĺžke 355 nm)
Pulsing frequency: 10 Hz (+ „single shot“ regime)
Main applications of the laser:
- ablating laser for Pulsed Laser Deposition
- ablating laser for preparing of nanoparticles by ablation in liquid
- surface treatment of materials
Fig. 1 Pulsed laser Quanta Ray Pro 250 in Laboratory laser microtechnology ILC
Fig. 2 Beam profile of Quanta Ray Pro 250
Coherent COMPex Pro 205F (manufacturer Coherent, Inc.)
Type: pulsed laser – gas active medium (composition KrF: Krypton – Florine with possibility of alternative ArF: Argon – Florine).
Wavelengths: 248 nm for KrF (or 193 nm for ArF)
Beam profile: rectangular ~ 24×12 mm, „top hat“ (flat maximum) – Fig. 4
Range of parameters:
Pulse-length: ~ 20 ns
Pulse energy (maximum): ~ 700 mJ
Pulsing frequency: 0,5 – 50 Hz (+ „single shot“ regime)
Main applications of the laser:
- ablating laser for Pulsed Laser Deposition
- ablating laser for preparing of nanoparticles by ablation in liquid
- surface treatment of materials
Fig. 3 Coherent COMPex Pro 205F laser in Laboratory laser microtechnology ILC
Fig. 4 Beam profile of excimer laser Coherent COMPex Pro 205F
Nd:YAG laser Valentino (a part of laser micromachining work station )
Type: diode pumped solid state Nd:YAG pulsed laser
Wavelength: 1064 nm
Beam dimensions: circular ø ~2,5 mm
Beam profile: multimode according to output power (Fig. 5)
Fig. 5 Beam profile of Valentino laser according to pumping current
Range of parameters:
Laser beam output can be as continuous emission (maximum power 20 W) or pulsed (AO-modulator) in kHz
Pulse lenght: ~ 100 ns
Output power (maximum): ~ 10 W (pri frekvencii 10 kHz)
Pulsing frequency: 1 – 10 kHz
Main applications of the laser (the laser is an integral part of laser micromachining work station AVANTEK LM 133-01:
- Surface marking of materials
- Substrates cutting / dicing
Solar W-50
Type: pulsed lamp pumped Nd:YAG laser.
Wavelength: 1064 nm
Beam output: multimode optical fibre (ø 0.80 mm)
Beam profile: multimode
Range of parameters:
Pulse length: 0,2 – 20 ms
Pulse energy (maximum): ~ 60 J
Pulsing frequency: 0,5 – 25 Hz (+ „single shot“ regime)
Average output power: depends on combination „ pulse energy : pulse length“ and frequency ( Fig. 7 pulse energy vs. pumping voltage and pulse length)
Main applications of the laser:
- Laser micro-welding of thin metal sheets/li>
- Repairing of small details
- Hole drilling
Fig. 6 Laser Solar W50 with optical fibre and focusing optics
Fig. 7 Pulse energy of laser Solar W-50 in dependence of pumping voltage and pulse length.
Semiconductor laser “Bělásek”
Type: semiconductor continuous wave laser
Wavelength: 450 nm
Beam profile: rectangular ~ 10×10 mm, multimode
Maximum powe: 9 W
Main applications of the laser:
- Light source for experiments with high speed imaging
- Heat source in materials heat treatment experiments
- “Remote optical effects”
Fig. 8 Bělásek in experiment (laser arc hybrid welding)
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