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TOPAG Lasertechnik GmbH
Nieder-Ramstädter Str. 247
64285 Darmstadt
Telefon: +49 6151 4259 78
Telefax: +49 6151 4259 88 
E- mail: info [at] 

NT242 - Serie, abstimmbar

NT242 - Serie, abstimmbares Nanosekunden Komplettsystem, Dioden-gepumpt


Die Modelle der NT242-Serie decken einen Wellenlängenbereich von 195nm bis 2600nm ab, wobei die Linienbreite stets <5cm-1 ist. Zudem sind die Einzellinien des Dioden-gepumpten Nd:YAG Pumplasers (1064/532/355nm) separat nutzbar. Die Repetitionsrate beträgt 1kHz. Die maximale Pulsenergie liegt bei 450µJ. Die Pulsdauer beträgt 3-6ns.


Bezeichnungen der Tabs

  • Beschreibung
  • Spezifikationen
  • Bilder
Tab 1


  • Integrates DPSS pump laser and OPO into a single housing
  • Hands-free no-gap wavelength tuning from 195 to 2600 nm
  • 1000 Hz pulse repetition rate
  • More than 40 μJ output pulse energy in UV
  • Less than 5 cm⁻¹ linewidth
  • 3 – 6 ns pulse duration
  • Remote control pad
  • PC control via USB port (RS232 is optional) and LabVIEW™ drivers
  • Separate output for the OPO pump beam (355 nm)


  • Laser-induced fluorescence
  • Flash photolysis
  • Photobiology
  • Remote sensing
  • Metrology
  • Non-linear spectroscopy
  • Other laser spectroscopy application

NT242 series lasers produce pulses at an unprecedented 1 kHz pulse repetition rate, tunable over a broad spectral range. Integrated into a single compact housing, the diode pumped Q-switched Nd:YAG laser and OPO offers hands‑free, no-gap tuning from 195 to 2600 nm. With its 1000 Hz repetition rate, the NT242 series laser establishes itself as a versatile tool for many laboratory applications, including laser induced fluorescence, flash photolysis, photobiology, metrology, remote sensing, etc.

NT242 series systems can be controlled from a user-friendly remote control pad or/and a computer using supplied LabVIEW™ drivers. The control pad allows easy control of all parameters and features on a backlit display that is easy to read even with laser safety eyewear.

Thanks to a DPSS pump source, the laser requires little maintenance. It is cooled by a stand alone chiller, which further reduces running costs. A built‑in OPO pump energy monitor allows monitoring of pump laser performance without the use of external power meters. A standard feature includes a separate output port for the 355 nm pump beam.

Accessories and optional items:

Option Features
-SH Tuning range extension in UV range (210 – 355 nm) by second harmonics generation
-SFG Tuning range extension in 300 – 405 nm range by sum-frequency generation

Tuning range extension in 210 – 405 nm range by combining second harmonics and sum-frequency generator outputs for maximum possible pulse energy

-SCU Spectral filtering accessory for improved spectral purity of pulses
-H, -2H 1064 nm or 532 nm output via separate port
-DUV Deep UV option in 195 – 209.9 nm range

Tab 2
Specifications 1)

Model NT242 NT242-SH NT242-SFG NT242-SH/SFG-DUV
Wavelength range
Signal 405-709 nm
Idler 710-2600 nm
SH and SFG       -      210-405 nm 2) 300-405 nm 2) 210-405 nm 2)
DUV - - - 195-209.9 nm
Pulse energy 3)  
OPO 450 µJ
SH and SFG - 40 µJ at 240 nm 40 µJ at 320 nm 40 µJ at 320 nm
DUV - - - 1 µJ at 200 nm
Pulse repetition rate 4) 1000 Hz
Pulse duration 5) 3-6 ns
Linewidth6) <5 cm-1
Scanning step  
Signal 0.1 nm
Idler 1 nm
SH and SFG - 0.05 nm -
DUV - - - 0.05 nm
Signal horizontal
Idler vertical
SH and SFG - vertical -
DUV - - - vertical
Typical beam diameter 7) 2.5 mm
Pump laser  
Pump wavelength 8) 355 nm 355/1064 nm
Max pump pulse energy 9) 3 mJ 3/1 mJ
Pulse duration 5) 6-8 ns at 1064 nm
Physical characteristics  
Laser head size (WxLxH) 455x1030x260 mm
Power supply size (WxLxH) 365x395x290 mm
Umbilical length 2.5 m
Operating requirements  
Cooling stand-alone chiller
Room temperature 15-30 °C
Relative humidity 20-80 % (non-condensing)
Power requirements 90-240 VAC, single phase 50/60 Hz
Power consumption < 1 kVA

 1) Due to continuous improvement, all specifications are subject to change without notice. For latest product information please visit EKSPLA. 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) Tuning range of 210 – 405 nm is provided by SH/SFG option.

3) See tuning curves for typical outputs at other wavelengths.

4) Inquire for other pulse repetition rates.

5) FWHM measured with photodiode featuring 1 ns rise time and 300 MHz bandwidth oscilloscope.

6) Linewidth is <8 cm-1 for 210- 405 nm range and 10cm-1 for 195-209 nm

7) Beam diameter is measured at 450 nm at the 1/e2 level and can vary depending on the pump pulse energy.

8) Separate output port for the 3rd harmonics beam is standard. Output ports for other harmonics are optional.

9) The laser max pulse energy will be optimized for best OPO performance. The actual pump laser output can vary with each unit we manufacture.




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Tab 3 Inhalt

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Tab 4 Inhalt

Tab 5
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Beschreibung 1
NT242 series nanosecond tunable DPSS lasers operating at kHz repetition rates
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Beschreibung 2
Typical beam profiles of NT242 series lasers at 500 nm : near field
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Beschreibung 3
Typical beam profiles of NT242 series lasers at 500 nm : far field
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Beschreibung 4
Typical output pulse energy of NT242 series tunable laser (SFG/SH/Idler/Signal)
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Beschreibung 5
Typical output pulse energy of NT242 series tunable laser (DUV)
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Beschreibung 6
NT242 series laser head dimensions
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Beschreibung 7
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Beschreibung 8
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Beschreibung 9
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Beschreibung 10