Q1 Series - Diode-pumped, Q-switched Lasers

Quantas Q1 is a diode-pumped, air-cooled, Q-switched laser designed for a wide range of applications that require low pulse repetition rate and high peak power pulses. The laser can produce up to 45 mJ at 10 Hz repetition rate, up to 25 mJ at 20 Hz repetition rate or up to 10 mJ at 50 Hz repetition rate.

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  • Up to 45 mJ pulse energy, up to 0.5 W average output power.
  • Air cooled (water-free).
  • Short pulse duration < 8 ns.
  • Variable pulse repetition rate.
  • Built-in sync pulse generator for triggering of user equipment.
  • Remote control via built-in Ethernet or Wifi interface.
  • Optional 2nd, 3rd, 4th or 5th harmonic generators.
  • Optional motorized attenuator for fundamental wavelength.
  • Optional pulse energy monitor with digital and analog readout.
  • Optional fiber coupled output.
  • > 2 Gshot pump diode lifetime.


  • Laser Induced Breakdown Spectroscopy (LIBS)
  • Time-of-Flight Spectroscopy (TOFS)
  • Light Induced Fluorescence (LIF) Spectroscopy
  • Flash photolysis
  • Matrix Assisted Laser Desorption/Ionization (MALDI)
  • Pulsed light deposition (PLD)
  • Laser ablation

Q1 is a compact, energy-efficient, diode pumped, air-cooled, Q-switched laser designed for wide range of applications that require high peak power pulses. Laser can produce up to 45 mJ at 10 Hz pulse repetition rate or up to 10 mJ at 50 Hz pulse repetition rate. Low divergence of laser beam allows efficient conversion to harmonic wavelengths using optional H1 series harmonic generator module. The laser can configured to emit 1053 nm or 1064 nm wavelength from Nd:YLF or Nd:YAG laser crystals respectively. Due athermal properties of Nd:YLF crystal, at 1053 nm the laser can operate from single shot to maximum pulse repetition rate without significant changes in beam divergence or profile. Innovative laser design resulted in user-friendly turnkey system that requires little maintenance. There is no chillers or bulky power supplies that one needs fit under the table. All laser electronics is integrated into Q1 housing and the only external modules are lightweight controller box that provides laser control interfaces and mains adapter that provides 12 VDC powering. Total weight of the laser is less than 5 kg.
Laser is monitored and controlled trough Ethernet port via build-in web-server. Any computer or even cell phone with modern web-browser will be able to control Q1. API is provided for integration with user devices. Low jitter triggering pulses for user equipment are available with up to 300 µs lead in internal triggering mode. In external triggering mode, laser pulsing can be externally triggered from delay generator.


  • Up to fifth harmonic
  • Integrated motorized attenuator
  • Attachable pulse energy monitor
  • Fiber coupled output
Model 1) Q1-B10 Q1-C10 Q1-D10 Q1-E10 Q1-B20 Q1-C20 Q1-D20 Q1-50 Q1-A50 Q1-B50
Pulse energy
    at 1053 / 1064 nm 10 mJ 20 mJ 35 mJ 45 mJ 8 mJ 15 mJ 25 mJ 2.5 mJ 5 mJ 10 mJ
    at 526.5 / 532 nm 5 mJ 10 mJ 17 mJ 22 mJ 4 mJ 7.5 mJ 12.5 mJ 1.2 mJ 2.5 mJ 5 mJ
    at 351 / 355 nm 3 mJ 6 mJ 10 mJ 13 mJ 2.5 mJ 5 mJ 7.5 mJ 0.6 mJ 1.5 mJ 3 mJ
    at 263 / 266 nm
1.5 mJ 3 mJ 5 mJ 7 mJ 1 mJ 1.8 mJ 3 mJ 0.3 mJ 0.7 mJ 1.5 mJ
    at 211 / 213 nm 0.5 mJ 1 mJ 2 mJ 2.5 mJ 0.4 mJ 0.7 mJ 1.2 mJ 0.1 mJ 0.2 mJ 0.5 mJ
Pulse duration < 8 ns < 7 ns < 8 ns < 10 ns < 9 ns < 8 ns
Repetition rate single-shot - 10 Hz single shot - 20 Hz single shot - 50 Hz
Beam profile Gaussian, > 75 % fit Gaussian, > 80 % fit
Pulse energy stability
    at 1053 / 1064 nm < 0.5 %
    at 526.5 / 532 nm < 2.5 %
    at 351 / 355 nm < 3.5 %
    at 263 / 266 nm < 4 %
    at 211 / 213 nm < 5 %

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.

Harmonic generator series H1

  • Stand-alone 2nd, 3rd, 3th or 5th harmonic generator compatible with Q1 series lasers.
  • Factory-configurable two exit ports.
  • Microprocessor controlled temperature tuned nonlinear crystals.
  • Remote monitoring and control via common with laser or separate Ethernet interface.
  • Optional attachable attenuator.
  • Optional attachable pulse energy monitor.
  • Optional fiber coupled output.

H1 is stand-alone harmonic generator module is designed to be used with our Q1 series lasers. Module is intended to be mounted side-by-side with Q1 laser on common optical table or breadboard. H1 has two exit ports that can be factory-configured to emit up to 5th harmonic wavelengths. Most common standard configurations are listed in the table below.

Harmonic generation is a phase-sensitive process which requires phase matching to be efficient. Phase matching is possible in birefringent crystals, by finely tuning refractive indexes of interacting laser beams to required values. There are two ways to change refractive index of birefringent crystal: by changing its temperature or by changing incidence angle of laser beam. In H1 modules phase matching of crystals is optimized by changing crystal temperature. Build-in microprocessor is used to fine tune and keep temperature stable. When supplied together with Q1 series laser, status of H1 can be remotely monitored and controlled from laser control panel (PC is required). Alternatively, control is possible directly via build-in Ethernet interface.

Most of high performance birefringent crystals are hygroscopic, which might limit their lifetime in humid environment. However, if they are continuously kept at higher than ambient temperatures, the lifetime of crystals can be significantly extended and can be even longer than laser system itself. To keep crystals dry, H1 module needs to be always connected to the power source. If power is not available, the module should be stored in dry place.

Model H1
Conversion efficiency
        to 2nd harmonic > 50 %
        to 3rd harmonic > 30 %
        to 4th harmonic > 15 %
        to 5th harmonic > 6 %
Pulse duration 10 - 20 % shorter in each conversion stage

For more details, please see our data sheet.


Motorized attenuators

  • Drop-in attachable to the laser body attenuators for 1st, 2nd, 3rd, 4th or 5th harmonics of Nd:YAG or Nd:YLF lasers.
  • Up to 98% maximum transmission.
  • Precise transmission control by stepper motor in microstepping mode (12800 steps/rotation).
  • Transmission adjustment accuracy <0.15%.
  • Remote control via common with laser Ethernet interface.
  • Optional stand-alone version for mounting on optical table.
  • Optional side port transforms attenuator to variable beam splitter.

Pulse energy of our Q-switched lasers can be conveniently lowered from maximum value by reducing current of pump diode. When less pump light is stored in lasing media, laser emits pulses with lower energy.

Above described method of pulse energy attenuation has its pros and cons. It is cost-effective, simple to implement, however, pulse energy change affects also other important laser beam parameters like pulse-to-pulse stability, beam divergence, pulse duration. For example, pulse-to-pulse energy stability of harmonics wavelengths might be more than 2 times worse at lower than nominal fundamental pulse energy.

AT series attenuators allows to attenuate laser pulse energy without changes in beam parameters.Attenuator consist of polarizer and waveplate. By changing of input beam polarization, transmission of beam can be changed for maximum to minimum value. Minimum transmission value depends on input beam polarization state and polarizer extinction ratio and typically is approx. 1 %.

Maximum possible transmission is determined by reflection and absorption losses of optical components. Several attenuators can be used in series if larger dynamic range is required. Attenuator transmission can be controlled trough common with laser Ethernet interface. API is provided for integration into user software.

Model AT1 AT2 AT3 AT4 AT5
Wavelength 1064 nm 532 nm 355 nm 266 nm 213 nm
Max transmission 98 % 95 % 90 % 75 % 65 %
Min transmission 1 % 0.5 %

For more details, please see our data sheet.


Attachable pulse energy monitor

For more details, please see our data sheet.


Fiber-coupled output

Please contact us for more information.

Do you have questions about Q1?

Write to us | info@topag.de

Give us a call | +49 6151 425978

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Do you have questions about our products?

Write to us | info@topag.de

Give us a call | +49 6151 425978

TOPAG Lasertechnik GmbH
Nieder-Ramstädter Str. 247
64285 Darmstadt, Germany
Phone: +49 6151 4259 78
Fax: +49 6151 4259 88
E-mail: info@topag.de