Quasar

HIGH POWER UV AND GREEN LASERS
FOR FAST, PRECISION MICROMACHINING

  • >60 W UV (300 µJ) or >45 W UV (225 µJ)
  • >95 W green (475 µJ) or >75 W green (375 µJ)
  • TimeShift™ Technology
  • High PRF from 0 to 3.5 MHz for fast processing

The breakthrough performance of the Quasar ® series leads the industry with unprecedented highest UV average power and energy at high rep rate for fast micromachining. Quasar features novel TimeShift™ technology for programmable pulse profiles for the ultimate in process speed, flexibility, and control.

Breakthrough Technology

Quasar combines advanced fiber laser, power amplifier and patented harmonics technologies to achieve breakthrough results. This unique design exploits fiber laser flexibility and robustness to enable TimeShift technology. Adding Spectra-Physics’ exclusive power amplifier, Quasar enhances this flexibility at unprecedented high output power levels. Finally, with Spectra-Physics’ patented harmonics, known for exceptional stability, Quasar continues to provide an innovative synergy of power, flexibility and control in a reliable 24/7 OEM laser for the most demanding applications.

Breakthrough Performance

The Quasar 355-60 produces >60 W of UV output power at 200 kHz and 300 kHz, and >300 µJ pulse energy, complimenting Spectra-Physics’ breakthrough Quasar 355-45 laser. The Quasar 355-60 operates over a wide repetition rate range from 0–3.5 MHz, with pulse widths from <2 ns to >100 ns. The newest Quasar 532 nm rounds out the Quasar series with >95 W of green output power, with similar pulse width and PRF range as the Quasar 355-60, complementing Spectra-Physics’ breakthrough Quasar 532-75 laser.

Quasar is designed, built, and tested to stringent quality standards for reliable continuous operation in demanding 24/7 manufacturing environments. The built-in ALPS (Active Laser Purification System) helps sustain that performance for long life. And finally, Quasar lasers’ automatic data logging software monitors all key laser performance parameters over the life of the laser, providing a powerful service feature and product reliability tool.

TimeShift™ Technology

Quasar is the first laser of this class to offer TimeShift technology, which enables pulse energy programmability in the time domain. By controlling the laser pulse (width and shape) in time and repetition rate, material removal and/or modification in micromachining becomes more efficient, thereby increasing process speed and quality. Utilizing TimeShift in conjunction with high UV or green power at a higher repetition rate means Quasar can process more materials faster, and with greater quality. TimeShift enables pulse width variation, as well as pulse splitting and burst mode operation. For the Quasar 355-60 and 532-95 models, pulse widths from <2 ns to >100 ns can be created at a constant PRF or conversely, maintain constant pulse width with varying repetition rate from 0 to 3.5 MHz. A set of standard TimeShift waveforms is provided with each Quasar. The TimeShift GUI, which enables users to develop custom waveforms, is available at additional pricing.

TimeShift Technology Flexibility and Benefits

TimeShift Constant Pulse Width vs PRF

Unlike conventional Q-switched lasers, Quasar’s TimeShift technology can maintain constant pulse width over a wide range of PRF. Constant pulse width means the peak power remains more constant allowing for more consistent process results at higher speeds.

Pulse Width vs Repetition Rate1

Actual Pulse Traces of Constant Pulse Widths vs PRF1

Quasar_10ns at 200kHz
10 ns at 200 kHz1,2
Quasar_10ns at 300kHz
10 ns at 300 kHz1,2
Quasar_10ns at 500kHz
10 ns at 500 kHz1,2

TimeShift Variable Pulse Width and Pulse Shaping

Varying the pulse width for a given PRF can be used to optimize the material interaction. By changing the energy and intensity within a pulse (pulse shaping), the heating or cooling of the material is further optimized.

Quasar_30ns_at_200kHz
30 ns at 200 kHz1,2
Quasar_50ns_at_200kHz
50 ns at 200 kHz1,2
Quasar_100ns at 200kHz
100 ns at 200 kHz1,2
Quasar_10ns-2 to 1 ratio
10 ns,
2:1 height ratio1,2
Quasar_10ns-1 to 2 ratio
10 ns,
1:2 height ratio1,2
 

TimeShift Pulse Splitting and Burst Mode

By splitting the pulses at a given PRF, the material is allowed to dissipate the heat or plasma such that more efficient material removal is possible. By altering the number, spacing, and relativity intensity of pulses within the burst, the spatial-temporal thermal profile in the work piece can be precisely tailored, increasing process speed and/or quality.

Quasar 6 x 10 ns_4x3
6 x 10 ns sub-pulses1,2
Quasar_10_x_5_ns-4x3
10 x 5 ns sub-pulses (Burst Mode)1,2

1. Typically measured performance; not a guaranteed or warranted specification.
2. Vertical range on oscilloscope set so that pulse peak is 75% of window.

 Quasar 355-60Quasar 355-45Quasar 532-95Quasar 532-75    
Wavelength 355 nm 355 nm 532 nm 532 nm    
Output Power >60 W @ 200 kHz, 10 ns
>60 W @ 300 kHz, 10 ns
>45 W @ 200 kHz, 10 ns
>45 W @ 250 kHz, 10 ns
>41 W @ 300 kHz, 10 ns
>95 W @ 200 kHz, 10 ns >75 W @ 200 kHz, 10 ns    
Maximum Pulse Energy >300 µJ >225 µJ >475 µJ >375 µJ    
Repetition Rate Range 0–3.5 MHz 0–1.7 MHz 0–3.5 MHz 0–1.7 MHz    
Optimized TimeShift™ Setting
(Nominal setup for beam optimization)
300 kHz, 10 ns 200 kHz, 10 ns    
Pulse-to-Pulse Stability3 <5%, 1σ    
Power Stability (after warm-up) <2%, 1σ, over 8 hours    
Beam Pointing Stability3 <±25 μrad/°C    
Peak-to-Peak Power Stability (after warm-up) ±3% over 8 hours    
Polarization 100:1, vertical 100:1, vertical 100:1, horizontal 100:1, horizontal    
Spatial Mode3 TEM00 (M2 <1.3)    
Beam Divergence, full angle3 <0.3 mrad <0.45 mrad    
Beam Asymmetry2 <1.10 (>90% circularty)    
Pulse Width, FWHM (TimeShift programmable)4 <2 ns to >100 ns <5 ns to >100 ns <2 ns to >100 ns <5 ns to >100 ns    
Beam Diameter (D4σ)3 3.5 ±0.35 mm    
Boresight Tolerance3 ±0.5 mm
±5 mrad
   
 
 Quasar 355-60Quasar 355-45Quasar 532-95Quasar 532-75    
Warm-up Time, typical <20 min from warm-up mode
<60 min from cold start
<20 min from warm-up mode
<40 min from cold start
<20 min from warm-up mode
<60 min from cold start
<20 min from warm-up mode
<40 min from cold start
   
Temperature Range 20–28°C    
Altitude 0–3000 m    
Humidity 10–80% non-condensing    
 Quasar 355-60Quasar 355-45Quasar 532-95Quasar 532-75    
Temperature Range 0–50 °C  
Altitude 0–10,000 m  
Humidity 10–80% non-condensing  
 Quasar 355-60Quasar 355-45Quasar 532-95Quasar 532-75    
Heat Load (at laser head) <1500 W  
Water Temperature (laser inlet) 20°C ±1°C  
Water Flow Rate (at laser head) 9.5 l/min  
Power Input 190–240 VAC, 2500 Watts Maximum, 50/60 Hz, single phase  
Heat Load (at power supply) <400 W  
Power Consumption <1900 W  
Water Temperature Stability ±0.5°C  
 Quasar 355-60Quasar 355-45Quasar 532-95Quasar 532-75    
Laser Head Dimensions (LxWxH)5 39.4 x 14.7 x 9.3 in (1000 x 373 x 235 mm)  
Laser Head Weight 200 lbs (90 kg)  
Power Supply Dimensions (LxWxH) 21.1 x 19.0 x 6.9 in (536 x 483 x 175 mm)  
Power Supply Weight 35 lbs (16 kg)  
Cable Length 5 m  
 Quasar 355-60Quasar 355-45Quasar 532-95Quasar 532-75    
RoHS 2 Compliant, China RoHS 2 Compliant Yes  
Replaceable Output Window Yes  
Optional Safety Shutter Yes  

1. Due to our continuous product improvement program, specifications may change without notice.
2. All 355 nm test specs are at 10 ns at 300 kHz with the diode current set to achieve 62 W for the Quasar 355-60, and 42 W for the Quasar 355-45. All 532 nm test specs are at 10 ns at 200 kHz with the diode current set to achieve 95 W for the Quasar 532-95, and 75 W for the Quasar 532-75.
3. Applies at 10 ns over the repetition rate range of 250 kHz to 400 kHz, using the appropriate TimeShift setup at the same input current set to achieve 300 kHz for Quasar 355-60, and input current to achieve 42 W 355 nm at 300 kHz for Quasar 355-45. Applies at 10 ns at 200 kHz for 75 W 532 nm version and at 10 ns 200 kHz for the 95 W 532 nm version.
4. The nominal pulse width is 10 ns. Alternative/programmable pulse widths using TimeShift will change power and beam parameter performance. Contact Spectra-Physics for more information.
5. Dimensions noted do not include the standard removable lifting hoist exoskeleton or the optional removable lift handles.

Quasar Laser Head Dimensions

Quasar Power Supply Dimensions

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