Quanta-Ray® INDI Series


  • Repetition rates from 10 to 20 Hz with energies in excess of 450 mJ per pulse
  • Gold elliptical pump chambers
  • Sealed beam paths
  • High-quality, high-damage-threshold optics from Spectra-Physics’ dedicated in-house coating lab

Spectra-Physics Quanta-Ray high-pulse energy Nd:YAG lasers are recognized world wide for their unsurpassed performance, reliability and quality. They incorporate pioneering technologies such as dual-rod oscillators, gold-coated elliptical pump chambers, internal sealed beam paths, and high-damage-threshold optics from Spectra-Physics’ advanced coatings lab—all combine to create the best beam quality and highest energies in the industry.

The heart of the Quanta-Ray laser is its unique pump chamber. The chamber strikes the perfect balance between efficiency and beam mode quality by employing elliptical goldcoated reflectors to couple the lamps into the Nd:YAG rod. The gold surfaces provide high reflectivity at pump wavelengths while attenuating UV wavelengths. Proprietary diffusion techniques ensure uniform illumination of the Nd:YAG rod.

Quanta-Ray lasers are also the only lasers on the market to feature completely sealed internal beam paths through the use of nitrogen-purged beam tubes. Sealed beam paths greatly extend the longevity of optical coatings by shielding all optical components from harmful contaminants in even the harshest of environments. Spectra-Physics uses only Sol-Gel coated pockels cells. This coating greatly enhances the lifetime of the cells and improves the performance of the laser system. BBO FHGs give highest energies, best beam quality and highest damage thresholds. These features lead to the best “bumper-to-bumper” one-year warranty on all optics, mechanics and electronics available from a pulsed YAG supplier.

Newly incorporated modern digital signal processing (DSP) electronics in all Quanta-Ray Nd:YAG lasers provide a modern control system for the user. Direct digital interface and Graphical User Interface (GUI) enables intuitive control of the system and simplified integration with complex systems.

The Quanta-Ray INDI series are single-rod oscillator-only Nd:YAG lasers. They offer pulse energies up to 450 mJ at 1064 nm. The INDI is the most compact of the Quanta-Ray lasers, and is based upon the Quanta-Ray’s unique combination of proprietary resonator design with gold-coated elliptical pump chambers to produce an output beam quality that is superior to other low-energy pulsed lasers available on the market.


Amplifier and OPCPA seeding
THz spectroscopy and imaging
Optical coherence tomography
Ultrafast spectroscopy
Pump-probe measurements
Materials processing
Two-photon polymerization
Thin-film metrology
Nonlinear optics
Multiplex CARS
Surface enhanced HHG
Repetition Rate 10 Hz 20 Hz  
Energy (mJ/p)2  
1064 nm 450 mJ 420 mJ  
532 nm 200 mJ 160 mJ  
355 nm3 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 Profile7 Standard Fit  
Near Field (1 m)15 >70%  
Far Field (∞)15 >95%  
Modulation10, 15 <30%  
Beam Diameter9 <10 mm  
Beam Pointing Stability10 <±100 µrad  
Beam Divergence11 <0.5 mrad  
Timing Jitter16 <0.5 ns  
 Quanta-Ray INDI Series  
Water Service12,13 N/A  
Electrical Service14,16 10/20 Hz: <15 A/<20 A  
Voltage15 190–260 V, single phase, 50/60 Hz  
Umbilical Length 3 m (10 ft)  
Remote Cord Length 3 m (10 ft)  
Weight 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) 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.
3. Addition of LBP option for pumping Scan Series OPOs can result in a 5% loss of 355 nm energy.
4. 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).
5. Pulse-to-pulse stability for >99% of pulses, measured over a 1 hour period.
6. Over 8 hour period with temperature variations of <±3°C.
7. 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. Fit to flat-top central 80% of beam near field.
8. Refers to maximum deviation from best fit Gaussian profile measured in near field (1 m) between FWHM points.
9. Actual beam diameter will vary depending on laser configuration.
10. 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.
11. Full angle measured at FWHM points.
12. INDI units are air cooled as standard. Water-cooled versions of INDI require WAT 50 (3.8 liters/min or 1 US gal/min).
13. Minimum pressure 40 psi. maximum pressure 60 psi.
14. 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.
15. Measured on request.
16. Max current draw of laser.

Quanta-Ray INDI Series Dimensions 

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