NT342 series

High Energy Broadly Tunable Lasers
  • Integrated OPO system
  • High energy
  • Ultrabroad tuning range from 192 to 2600 nm
  • Up to 50 mJ in VIS
  • Up to 20 Hz repetition rate
  • Integrated OPO system
  • High energy
  • Ultrabroad tuning range from 192 to 2600 nm
  • Up to 50 mJ in VIS
  • Up to 20 Hz repetition rate

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 20 Hz pulse repetition rate
  • Remote control pad
  • PC control via RS232 and LabVIEW™ drivers
  • Optional separate shared output port for 532/1064 nm beam (separate output port for the 355 nm beam is standard)
  • 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 NT342 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. NT342 has 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 – 410 nm range
-SFSum-frequency generator for 300 – 410 nm range with high pulse energy
-SH/SFCombined option for highest pulse energy in 210 – 410 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


OPO 1)
Wavelength range 2)
    Signal 410 – 710 nm 3)
    Idler 710 – 2600 nm
    SH generator (optional) 210 – 410 nm
    SH/SF generator (optional)210 – 410 nm
    DUV generator (optional)192 – 210 nm
Output pulse energy
    OPO 4)30 mJ50 mJ
    SH generator (optional) 5) 4 mJ6.5 mJ
    SH/SF generator (optional) 6)6 mJ10 mJ
    DUV generator (optional) 7)0.6 mJ1 mJ
Linewidth<5 cm-1 8)
Tuning resolution 9)
    Signal (410 – 710 nm)1 cm⁻¹
    Idler (710 – 2600 nm) 1 cm⁻¹
    SH/SF/DUV beam (192 – 410 nm) 2 cm⁻¹
Pulse duration 10)3 – 5 ns
Typical beam diameter 11)5 mm7 mm
Typical beam divergence 12)< 2 mrad
    Signal beamhorizontal
    Idler beamvertical
    SH/SF beamhorizontal
    DUV beamvertical
Pump wavelength355 nm
Max pump pulse energy100 mJ150 mJ
Pulse duration4 – 6 ns
Beam qualityHat-top in near field, without hot spots
Beam divergence< 0.6 mrad
Pulse energy stability (StdDev)< 3.5 %
Pulse repetition rate10 or 20 Hz10 Hz
Unit size (W × L × H) 14)456 × 821× 270 mm
Power supply size (W × L × H)330 × 490 × 585 mm
Umbilical length2.5 m
Water consumption (max 20 °C) 15)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 16)1.8 / 3.4 kVA
  1. Due to continuous improvement, all specifications are subject to change. Parameters marked typical are illustrative; they are indications of typical performance and will vary with each unit we manufacture. Unless stated otherwise, all specifications are measured at 450 nm and for basic system without options.
  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  curves 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 – 410 nm range. See tuning curves for typical outputs at other wavelengths.
  7. Measured at 200 nm.
  8. Linewidth is <8 cm⁻¹ for 210 – 410 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. Length from 821 to 1220 mm depending on configuration.
  15. At 10 Hz pulse repetition rate. Air cooled power supply is available.
  16. At 10/20 Hz pulse repetition rate.

Note: Laser must be connected to the mains electricity all the time. If there will be no mains electricity for longer that 1 hour then laser (system) needs warm up for a few hours before switching on.

Performance & Drawings

Ordering information

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