Quanta-Ray® INDI


  • Repetition rates of 10 or 20 Hz and energies up to 450 mJ/pulse in the IR
  • Fast Digital Signal Processor (DSP) electronics
  • Computer interface and versatile GUI

Quanta-Ray INDI Series, Compact Nd:YAG Lasers

Quanta-Ray® Nd:YAG lasers are recognized world wide for their unsurpassed performance, reliability and quality. The Quanta-Ray INDI Series are oscillator-only YAG lasers with a single rod and pump chamber configuration. Our proprietary resonator design combined with Quanta-Ray’s unique gold-coated elliptical pump chamber produces an output beam quality that is superior to other low energy pulsed lasers available on the market.

Newly incorporated modern digital signal processing (DSP) electronics into all Quanta-Ray YAG lasers provide a number of advantages for users.

  • A direct digital interface and GUI enhances the reliability and convenience of using Quanta-Ray INDI, maximizing the time spent doing experiments.
  • Variable repetition rates are now possible with digital control. This digital control lets the user set the rep rate to integer-fractions of the lamp pulse frequency. Thus, the thermal steady-state in the resonator is maintained by a constant flash lamp frequency, but the rep rate of the light output can be varied.

The traditional features and advantages that have made Quanta-Ray the world's leading pulsed Nd:YAG laser are still integral to our design philosophy for laser quality. These features include gold-coated elliptical pump chambers, internal sealed beam path and high-damage-threshold optics from Spectra-Physics’ advanced coatings lab.


Pump source for OPOs
Pump source for Ti:Sapphire lasers
Pump source for dye lasers
Laser-induced fluorescence
Remote sensing
Repetition Rate 10 Hz 20 Hz  
Energy (mJ/p)2  
1064 nm 450 mJ 420 mJ  
532 nm 200 mJ 160 mJ  
355 nm23 100 mJ 100 mJ  
266 nm 55 mJ 40 mJ  
Pulse Width 6–9 ns  
Short Term Energy Stability6 ±2%  
Long Term Power Drift7 <3%  
Spatial Mode Profile8 Standard Fit  
Near Field (1 m)20 >70%  
Far Field (∞)20 >95%  
Modulation10, 20, 21 <30%  
Beam Diameter11 <10 mm  
Beam Pointing Stability12 <±100 µrad  
Beam Divergence13 <0.5 mrad  
Timing Jitter16 <0.5 ns  
 Quanta-Ray ProQuanta-Ray LabQuanta-Ray INDI  
Water Service17, 18 10 Hz – 3.8 liters/min (1.0 US gallons/min)
30 Hz and 50 Hz – 7.6 liters/min (2.0 US gallons/min)
10 Hz, 30 Hz and 50 Hz – 7.6 liters/min (2.0 US gallons/min) N/A  
Electrical Service22 10/30/50 Hz: <30 A/<40 A/<50 A 10/30/50 Hz: <30 A/<40 A/<50 A 10/20 Hz: <15 A/<20 A  
Voltage19 190–260 V, single phase, 50/60 Hz  
Umbilical Length 3 m (10 ft)  
Remote Cord Length 3 m (10 ft)  
Weight Laser Head 84 kg (185 lb)
Power Supply 114 kg (250 lb)
Laser Head 55 kg (120 lb)
Power Supply 68 kg (150 lb)
Laser Head 11 kg (25 lb) (IR); 15 kg (34 lb) (HG)
Power Supply 60 kg (132 lb)
Power Supply Dimensions (L x W x H) 76.99 x 64.00 x 75.74 cm
(30.3 x 25.2 x 29.8 in)
76.9 x 63.9 x 50.2 cm
(30.31 x 25.18 x 19.75 in)
64.7 x 33.4 x 55.4 cm
(25.46 x 13.13 x 21.81 in)

1. All specifications, unless otherwise stated, are for Q-switched 1064 nm operation and are subject to change without notice.
2. Harmonic energies are specified after separation using dichroic mirror pairs. It is also assumed that polarization of measured harmonic is in vertical polarization, making an "S" polarized reflection from dichroics. 532 nm energies are specified using Type II SHG. 355 nm energies are specified using Type II doubler. Using a Type I doubler in tripling process will result in a 10% increase in published 355 nm specification EXCEPT for the following models: INDI, Lab-130-10, Lab-190-10, Pro-250-10, Pro-230-10.
3. High UV output option designed for OPO pumping, including injection seeder, harmonic generator, 355 nm dichroic separators, and beam dump.
4. The Lab-190-10 is configured on a Quanta-Ray Pro platform. This allows for BeamLok in this model. For laser head size, please refer to Quanta-Ray Pro specifications.
5. Normal full width half maximum (FWHM) pulse width 8-10 ns for all Lab series lasers except Lab 130-10 and Lab 190-10 versions, which is 9-12 ns. FWHM for Pro series lasers is 10-12 ns except for Pro 270-10, Pro 290-10, and Pro 350-10 versions which is 8-10 ns. The optional short pulse mode reduces the 1064 nm pulse width to approximately 2.5 ns and reduces the energy by approximately 10%. (Short pulse mode available on seeded versions on special request only).
6. Pulse-to-pulse stability for >99% of pulses, measured over a 1 hour period.
7. Over 8 hour period with temperature variations of <±3°C.
8. Near field spatial profiles measured <1 m from laser using commercially available beam diagnostic system. 70% refers to correlation between actual beam profile and least squares best fit Gaussian profile. Far field profiles are measured at focal plane of a 2 m focal length lens and measured between FWHM points. Specifications based on 10 Hz lasers.
9. Enhanced spatial mode options can be tailored to meet your application needs. To obtain >85% Gaussian fits, energy can be reduced by 50%. Contact Spectra-Physics to establish specifications.
10. Refers to maximum deviation from best fit Gaussian profile measured in near field (1 m) between FWHM points.
11. Actual beam diameter will vary depending on laser configuration.
12. Long term average pointing drift after warm up, over 8 hours ±-3°C. Shot-to-shot pointing stability <±25 µrad. Angle measured is polar angle.
13. Full angle measured at FWHM points.
14. IR energy within 10% of specified value.
15. Insertion losses for systems using Model 6350 injection seeder are <15% at 1064 nm, 532 nm, and 266 nm.
16. RMS jitter from Q-switched sync pulse at 10 Hz. Jitter is =1 ns RMS when using Model 6350 injection seeder at 10 Hz and =1.5 ns at 30 Hz. INDI cannot be seeded.
17. INDI, Lab 130-10 and Lab 150-10 units are air cooled as standard. Water-cooled versions of INDI require WAT 50 (3.8 liters/min or 1 US gal/min). Water-cooled versions of Lab 130-10 and Lab 150-10 require PS101 (3.8 liters/min or 1.0 US gal/min). All seeded lasers must be water cooled.
18. Minimum pressure 40 psi. Maximum pressure 60 psi.
19. Input transformer has taps at 190, 200, 210, 220, 230, 240, 250, and 260 V. Once tap is chosen, actual input voltage differing by more than ±10% may affect operation of laser.
20. Measured on request.
21. Fit to flat-top central 80% of beam near field.
22. Max current draw of laser.
23. Addition of LBP option for pumping Scan Series OPOs can result in a 5% loss of 355 nm energy.

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