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NT200 series Nanosecond Tunable DPSS Lasers

Integrated in a single compact housing diode pumped Q-switched laser and OPO system offers tuning from 335 to 12 000 nm. Offering 1000 Hz repetition rate NT200 series laser establishes itself as a versatile tool for many laboratory 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 12000 nm
  • Pulse repetition rates up to 10 kHz
  • Narrow linewidth
  • Hands-free tuning
  • 6-9 ns pulse duration of pump laser
  • Remote control pad
  • PC control via USB (RS-232 is optional) and LabVIEM™ drivers


  • Laser-induced fluorescence
  • Photolysis
  • IR spectroscopy
  • Photobiology
  • Remote sensing
  • Metrology
  • Gas spectroscopy
  • Other laser spectroscopy applications


NT200 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 10 kHz (depending on model) while avoiding frequent flashlamp changes that are common when flashlamp pumped lasers are used.

Most of the pump lasers do not require 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.


NT200 series available models

Model Feature
NT252 Highest pulse energy in near IR range, high efficiency second harmonic generator
NT253 Variable pulse repetition rate in 0 – 10 kHz range, 700 – 900 nm and 1300 – 2200 nm tuning range
NT273 Fixed wavelength OPO producing eye-safe output at 1572 nm
NT273-XIR Tunable output in mid to far-IR range from 4100 nm to 12 000 nm
NT277 High pulse repetition rate OPO producing tunable output in 2500 – 4475 nm spectral range

Specifications 1)

Model NT252 NT253-10K NT273 NT273-XIR NT277
Wavelength range
  Signal 670-1063 nm 700-900 nm 1572 nm
  Idler 1064-2600 nm 1300-2200 nm 3293 nm 4500-12000 nm 2) 2500-4475 nm
  SH or SF 335-531 nm 350-450 nm
Pulse energy 3)
  OPO 900 µJ at 800 nm 25 µJ at 800 nm 400 µJ at 1572 nm 20 µJ at 7000 nm 150 µJ at 3000 nm
  SH or SF 180 µJ at 400 nm 2 µJ at 400 nm
Pulse repetition rate 4) 1000 Hz 0-10 kHz 0-1000 Hz 5) 1000 Hz 1000 Hz 5) 6)
Linewidth 7) <8 cm-1 <20 cm-1 <3 cm-1 <6 cm-1 10-150 cm-1 8)
Scanning step
  Signal 0.1 nm
  Idler 1 nm 1 nm 1 nm
  SH or SF 0.05 nm
  Signal horizontal vertical vertical
  Idler vertical horizontal horizontal vertical
  SH or SF horizontal
Typical beam diameter 9) 10) 2.5 mm 2 mm 4 mm 4 mm
Pump wavelength 11) 532 nm 1064 nm
Max pump pulse energy 12) 4.5 mJ 150 µJ 1.9 mJ 4 mJ
Pulse duration 13) <8 ns <10 ns <9 ns
Beam quality fit to Gaussian > 90 %
Pulse energy stability (StdDev) < 3 % < 1 %
Unit size (W x L x H) 453 x 1030 x 274 mm 320 x 800 x 120 mm 305 x 820 x 270 mm 305 x 910 x 270 mm
Power supply size
(W x L x H)
365 x 392 x 289 mm 472 x 461 x 289 mm 365 x 392 x 289 mm
Umbilical length 2.5 m
Cooling stand-alone chiller air
Room temperature 15-30 °C
Relative humidity 20-80 % (non-condensing)
Power requirements 90-240 V AC, single phase 50/60 Hz
Power consumption < 1 kVA < 0.5 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 1064 nm.
2) Available wavelength range. Custom tuning ranges are available.
3) Inquire about tuning curves for typical outputs at other wavelengths.
4) Inquire for other pulse repetition rates. For some models up to 20 kHz PRR is possible.
5) 500 Hz version is available for higher pulse energy.
6) 100 kHz version is available. Please contact Ekspla for more details.
7) In signal range.
8) <10 cm⁻¹ option is available for whole tuning range.
9) Measured at the wavelength indicated in the “Pulse energy” specification row.
10) Beam diameter is measured at the 1/e2 level at the laser output and can vary depending on the pump pulse energy.
11) Separate output port for the pump beam is standard. Output ports for other available harmonics are optional.
12) The laser max pulse energy will be optimized for best OPO performance. The actual pump laser output can vary with each unit we manufacture.
13) FWHM measured with photodiode featuring 1 ns rise time and 300 MHz bandwidth oscilloscope.


Ordering information

NT200 series nanosecond tunable wavelength DPSS laser ordering information