Quantum Light Instruments Ltd. innovative water-free laser crystal cooling technology enables generation of high quality laser beam with up to 120 mJ pulse energy and/or up to 5 W average output power.
Q2HE series sets new standard in Q-switched laser market. Advanced laser design resulted in compact, user-friendly turnkey system that requires little maintenance. There are no chillers or bulky power supplies that one needs fit under the table. Most of laser electronics are integrated into housing of the Q2HE and the only external modules are compact controller box and mains adapter that provides 28 VDC, 50-150 W power (depending on model).
Less than 7 ns pulse duration and low divergence of the beam enables efficient fundamental wavelength conversion to higher harmonics with shortest wavelength available of 211 nm.
Low jitter triggering pulses for user equipment are available in internal triggering mode. If required, laser pulsing can be externally triggered from delay generator.
Laser is controlled trough Ethernet port via build-in web-server. There is no need to install control software – any computer or even cell phone with modern web-browser installed will be able to control Q2HE. API is provided for integration with user devices.

Optional extensions are available by request:

  • Attachable second harmonic generator.
  • Attachable motorized attenuator for fundamental wavelength beam.
  • Attachable motorized attenuator for fundamental wavelength beam.
  • Attachable pulse energy monitor with analog and/or digital output.
  • Attachable beam guiding module.
  • External two-channel pulse generator for variable pulse repetition rate.
  • External seeder for SLM operation.
  • Optional stand-alone air purging unit for operation in harsh environment

Specifications 1)









1064 or 1053 nm

1064 nm

1064 or 1053 nm

Pulse repetition rate 2)

50 Hz

100 Hz

50 Hz

10 Hz

20 Hz

Pulse energy 3)

40 mJ

70 mJ

100/120 mJ

80/100 mJ

Pulse duration 4)

< 7 ns

< 6 ns

Pulse to pulse energy stability

<0.5 % RMS 5)

Power drift

± 3.0 % 6)

Beam profile

Bell-shaped, >75 % fit to Gaussian

Beam divergence 7)

< 1 mrad


Linear, horizontal

Typical beam diameter 8)

3.0 mm

3.5 mm

4.5 mm


< 0.5 ns RMS 9)

Optional harmonics generator 10)
Pulse energy 3)
532/526.5 nm

20 mJ

35 mJ

50/60 mJ

40/50 mJ

355/351 nm

12 mJ

20 mJ

30/35 mJ

25/30 mJ

266/261 nm

5 mJ

10 mJ

15/18 mJ

12/15 mJ

213/211 nm

1.5 mJ

3 mJ

4/5 mJ

3.5/4 mJ

Optional attenuator 11)

Transmission range

1% – 95 %

Laser head (W×L×H)

190 × 408 × 155 mm3

Controller unit(W×L×H)

108× 191 × 59 mm3

AC/DC power adapter, typical (W×L×H)

 422 × 330 × 89 mm3

192 × 178 × 46 mm3

Operating requirements

Cooling requirements

Air cooled

Ambient temperature

15 – 30 ºC

Relative humidity (non-condensing)

10 – 80 %

Mains voltage

90-230 VAC, single phase, 47-63 Hz. 12)

Average power consumption

100 W

150 W



  1. Due to continuous improvements all specifications are subject to change. Unless stated otherwise all specifications are measured at fundamental wavelength and maximum pulse repetition rate. The parameters marked typical are not specifications. They are indications of typical performance and will vary with each unit we manufacture.
  2. Factory-set pulse repetition rate is fixed at max repetition rate shown in the table. In internal triggering mode repetition rate can be divided by integer number down to f/2, f/3, f/4,.. 1 Hz. Pulse repetition rate up to 200 Hz are available by request.
  3. When pulse energy is presented in xx/yy format, first number is for 1064 nm wavelength version, second – for 1053 nm version.
  4. At FWHM level at 1064 nm, measured with 350 ps rise time photodiode.
  5. Measured during 30 seconds operation after warm-up.
  6. Over 8 hour period after 20 minutes of warm-up when ambient temperature variation is less than ±2 °C.
  7. Full angle measured at the at the 4σ level.
  8. Beam diameter is measured 20 cm from laser output at the 4σ level.
  9. In respect to falling edge of pump diode triggering pulse.
  10. Q2HE is compatible with our attachable second harmonic generator and all models of stand-alone H-SMART harmonics generator. Pulse energies presented here are maximum values. Please refer to harmonic generator datasheets for detailed specifications.
  11. Motorized attenuator intended to be attached to the laser housing. Transmission can be changed remotely trough laser web-server control interface.
  12. Laser can be powered from appropriate 28 VDC power source. Please inquire for details.