NT252 series

Tunable Wavelength UV-NIR Range DPSS Lasers
  • High repetition rate NIR-IR OPO system
  • Ultrabroad tuning from 335 to 2600 nm
  • Up to 0.9 mJ energy
  • High repetition rate NIR-IR OPO system
  • Ultrabroad tuning from 335 to 2600 nm
  • Up to 0.9 mJ energy

Features & Applications


  • Integrates DPSS pump laser and OPO into single housing
  • Separate output ports for the pump laser and OPO beams
  • OPO output wavelength range from 335 nm to 2600 nm
  • Narrow linewidth
  • Hands-free tuning
  • 3 – 6 ns pulse duration of pump laser
  • Remote control pad
  • PC control via USB (RS-232 is optional) and LabVIEM™ drivers


  • Photoacoustic imaging
  • Laser-induced fluorescence
  • Photolysis
  • Photobiology
  • Remote sensing
  • Metrology


NT252 series tunable laser systems integrates into a single compact housing a nanosecond Optical Parametric Oscillator (OPO) and Diode-Pumped Solid–State (DPSS) Q-switched pump laser.

Diode pumping enables fast data acquisition at high pulse repetition rates up to 1 kHz while avoiding frequent flashlamp changes that are common when flashlamp pumped lasers are used. Built-in chiller eliminates the need for tap water for cooling, thus further reducing running and maintenance costs.

All lasers feature motorized tuning across the specified tuning range. The output wavelength can be set from control pad with backlit display that is easy to read even while wearing laser safety glasses. Alternatively, the laser can be controlled also from personal computer through USB (RS-232 is optional) interface using supplied LabVIEW™ drivers.

High conversion efficiency, stable output, easy maintenance and compact size make our systems excellent choice for many applications.

Accessories and Optional Items

-SHTuning range extension in UV range (335 – 670 nm) by second harmonic generation
-H, -2H1064 and 532 nm output via separate port
-FCFiber coupler
-AttnAttenuator option


Model NT252
OPO 1)
Wavelength range
    Signal670 – 1063 nm
    Idler1064 – 2600 nm
    SH335 – 670 nm
Pulse energy 2)
    OPO900 µJ at 800 nm
    SH180 µJ at 400 nm
Pulse repetition rate1000 Hz
Linewidth 3) <8 cm-1
Tuning resolution 4)
    Signal 1 cm⁻¹
    Idler1 cm⁻¹
    SH2 cm⁻¹
    Signal horizontal
    Idler vertical
    SH horizontal
Typical beam diameter 5) 6) 3 × 6 mm
Pump wavelength 7)532 nm
Max pump pulse energy 8)4 mJ
Pulse duration 9) 4 – 6 ns
Pulse energy stability (StdDev) < 2.5 %
Unit size (W × L × H)456 × 1030 × 274 mm
Power supply size (W × L × H)520 × 400 × 300 mm
Umbilical length2.5 m
Coolingbuilt-in chiller
Room temperature18 – 27 °C
Relative humidity20 – 80 % (non-condensing)
Power requirements90 – 240 V AC, single phase 50/60 Hz
  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 800 nm and for basic system without options.
  2. Please refer to tuning curves for typical outputs at other wavelengths.
  3. In signal and idler range.
  4. For manual input from PC. When wavelength is controlled from keypad, tuning resolution is 0.1 nm for signal, 1 nm for idler and 0.05 nm for SH.
  5. Measured at the wavelength indicated in the “Pulse energy” specification row.
  6. Beam diameter is measured at the 1/e2 level at the laser output and can vary depending on the pump pulse energy.
  7. Separate output port for the 2nd and other harmonic are optional.
  8. The laser max pulse energy will be optimized for best OPO performance. The actual pump laser output can vary with each unit we manufacture.
  9. Measured at FWHM level with photodiode featuring 1 ns rise time and 300 MHz bandwidth oscilloscope.

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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