NT342 series

High Energy Broadly Tunable Lasers
  • Integrated OPO system
  • High energy
  • Ultrabroad tuning range from 193 to 2600 nm
  • Up to 50 mJ in VIS
  • At 10/20 Hz
  • Integrated OPO system
  • High energy
  • Ultrabroad tuning range from 193 to 2600 nm
  • Up to 50 mJ in VIS
  • At 10/20 Hz

Features & Applications


  • Hands-free no gap wavelength tuning from 192 to 2600 nm
  • Up to 50 mJ pulse energy in visible spectral range
  • Up to 10 mJ pulse energy in UV spectral range
  • Less than 5 cm⁻¹ linewidth
  • 3–5 ns pulse duration
  • Up to 30 Hz pulse repetition rate
  • Remote control pad
  • PC control via RS232 and LabVIEW™ drivers
  • Optional separate shared output port for 355/532/1064 nm beam
  • OPO pump energy monitoring
  • Replacement of flashlamps without misalignment of the laser cavity
  • Hermetically sealed oscillator cavity protects non-linear crystals from dust and humidity


  • Laser-induced fluorescence
  • Flash photolysis
  • Photobiology
  • Remote sensing
  • Time-resolved spectroscopy
  • Non-linear spectroscopy


The NT340 series tunable wavelength nanosecond laser seamlessly integrates the nanosecond optical parametric oscillator and the Nd:YAG Q-switched nanosecond laser – all in a compact housing. The main system features are: hands-free wavelength tuning from UV to IR, high conversion efficiency, optional fiber-coupled output and separate output port for pump laser beam. Narrow bandwidth models have a linewidth of less than 5 cm⁻¹, which is ideal for many spectroscopic applications.

The laser is designed for convenient use. It can be controlled from remote keypad or from a PC through an RS232 interface using LabView™ drivers that are supplied with the system. The remote keypad features a backlit display that is easy to read even through laser safety googles. The OPO pump energy monitoring system helps to control pump laser parameters. Replacement of laser flashlamps can be done without misalignment of the laser cavity and/or deterioration of laser performance.

Tuning range extensions

-SHSecond harmonic generator for 210 – 409 nm range
-SFSum-frequency generator for 300 – 409 nm range with high pulse energy
-SH/SFCombined option for highest pulse energy in 225 – 409 nm range
-DUVDeep UV option for 192 – 210 nm range

Accessories and Options

-FCFiber coupled output in 350 – 2000 nm range
-ATTNPulse energy attenuator
-H, -2HSeparate shared output port for Nd:YAG pump laser harmonics (532 or 1064 nm wavelengths)
-AWAir cooled power supply


Model 1)NT342ANT342BNT342C
Wavelength range 2)
    Signal 410 – 709 nm 3)
    Idler 710 – 2600 nm
    SH generator (optional) 210 – 409 nm
    SH/SF generator (optional)210 – 409 nm
    DUV generator (optional)192 – 209 nm
Output pulse energy
    OPO 4)15 mJ30 mJ50 mJ
    SH generator (optional) 5) 2 mJ 4 mJ6.5 mJ
    SH/SF generator (optional) 6)3 mJ6 mJ10 mJ
    DUV generator (optional) 7)0.3 mJ0.6 mJ1 mJ
Linewidth<5 cm-1 8)
Scanning step 9)
    Signal (410 – 709 nm)0.1 nm
    Idler (710 – 2600 nm) 1 nm
    SH/SF/DUV beam (192 – 409 nm) 0.05 nm
Pulse duration 10)3 – 5 ns
Typical beam diameter 11)4 mm5 mm7 mm
Typical beam divergence 12)< 2 mrad
    Signal beamhorizontal
    Idler beamvertical
    SH/SF/DUV beamhorizontal
Pump laser 13)
Pump wavelength355 nm
Max pump pulse energy50 mJ100 mJ150 mJ
Pulse duration4 – 6 ns
Beam qualityHat-top in near field, without hot spots
Beam divergence&kt; 0.6 mrad
Pulse energy stability (Std.Dev)< 3.5 %
Pulse repetition rate10 or 20 Hz 14)10 or 20 Hz10 Hz
Physical characteristics
Unit size (W × L × H) 15)452 × 800 × 270 mm
Power supply size (W × L × H)330 × 490 × 585 mm
Umbilical length2.5 m
Operating requirements
Water consumption (max 20 °C) 16)6 l/min
Room temperature15 – 30 °C
Relative humidity20 – 80 % (non-condensing)
Mains voltage208 or 240 V AC, single phase 50/60 Hz
Power consumption 17)1.8 / 3.4 kVA
  1. Due to continuous improvement, all specifications are subject to change without notice. Parameters marked typical are not specifications. They are indications of typical performance and will vary with each unit we manufacture. Unless stated otherwise, all specifications are measured at 450 nm.
  2. Hands-free tuning range is from 192 nm to 2600 nm.
  3. Tuning range extension to 400 – 709 nm is optional.
  4. Measured at 450 nm. See tuning cur ves for typical outputs at other wavelengths.
  5. Measured at 260 nm. See tuning curves for typical outputs at other wavelengths.
  6. Measured at 340 nm. SF generator is optimized for maximum output in 300 – 409 nm range. See tuning curves for typical outputs at other wavelengths.
  7. Measured at 200 nm.
  8. Linewidth is <8 cm⁻¹ for 210 – 409 nm range.
  9. Represents wavelength change quantum for manual input from control pad. When wavelength is controlled from PC, the wavelength set precision is ~1 cm⁻¹ in OPO range and ~2 cm⁻¹ in SH/SFG range.
  10. FWHM measured with photodiode featuring 1 ns rise time and 300 MHz bandwidth oscilloscope.
  11. Beam diameter is measured at 450 nm at the FWHM level and can vary depending on the pump pulse energy.
  12. Full angle measured at the FWHM level at 450 nm.
  13. Separate output port for the 355 nm beam is standard. Outputs for 1064 nm and 532 nm beams are optional. Laser output will be optimised for OPO operation and specifications may vary with each unit we manufacture.
  14. 30 Hz version is available. Inquire for pulse energy specifications.
  15. Length from 821 to 1220 mm depending on configuration.
  16. At 10 Hz pulse repetition rate. Air cooled power supply is available.
  17. At 10/20 Hz pulse repetition rate.

Performance & Drawings

Ordering information

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