NT270 Series - Tunable, Diode-pumped Nanosecond Lasers

The diode pumped Q-switched laser and OPO system integrated into a single compact housing offer a tuning range from 2500 nm to 12 µm. The NT270 series offers a repetition rate of 1000 Hz and pulse energies up to 80 µJ. The pulse width is < 9 ns.

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  • Integrates DPSS pump laser and OPO into single housing
  • Separate output ports for the pump laser and OPO beams
  • OPO output wavelength range from 2500 nm to 12000 nm (depending on model)
  • Narrow linewidth
  • Hands-free tuning
  • <9 ns pulse duration
  • Remote control pad
  • PC control via USB (RS-232 is optional) and LabVIEM™ drivers


  • Scanning Near-field Optical Microscopy (s-SNOM) microscopy
  • Single molecule vibrational spectroscopy
  • IR spectroscopy
  • Gas spectroscopy

NT270 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. 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.

NT270 series available models

Model Feature
NT277 High pulse repetition rate OPO producing tunable output in 2500 – 4475 nm spectral range
NT277-XIR Tunable output from NIR to far-IR range, 2500 nm to 12 000 nm
Model 1) NT277 NT277-XIR
Wavelength range, idler 2500 – 4575 nm 2500 - 4475 nm
4500 - 12000 nm 2)
Pulse energy, idler 3) 80 µJ at 3000 nm 80 µJ at 3000 nm
20 µJ at 7000 nm
Pulse duration < 9 ns
Repetition rate 1000 Hz
Linewidth 4) < 10 cm-1 < 12 cm-1

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 3000 nm for NT277, NT277-XIR unit and at 7000 nm for NT277-XIR units and for basic system without options.

2) Available wavelength range. Custom tuning ranges are available.

3) Inquire about tuning curves for typical outputs at other wavelengths.

4) Higher energy 10 – 150 cm-1 option is available for 2500 – 4475 nm tuning range.

Lengyel, J. et al. (2017) Infrared spectroscopy of O˙ and OH in water clusters: evidence for fast interconversion between O˙ and OH˙OH. Physical Chemistry Chemical Physics. Vol. 19, No. 37

Group: Prof. M. Beyer, University of Innsbruck

Laser: NT277


We present infrared multiple photon dissociation (IRMPD) spectra of (H2O)n and (H2O)nOH cluster ensembles for ≈ 8 and 47 in the range of 2400–4000 cm−1. Both hydrated ions exhibit the same spectral features, in good agreement with theoretical calculations. Decomposition of the calculated spectra shows that bands originating from H2O⋯O˙ and H2O⋯OH interactions span almost the whole spectral region of interest. Experimentally, evaporation of OH˙ is observed to a small extent, which requires interconversion of (H2O)n into (H2O)n–1OH˙OH, with subsequent H2O evaporation preferred over OH˙ evaporation. The modeling shows that (H2O)n and (H2O)n–1OH˙OH cannot be distinguished by IRMPD spectroscopy.

Full Publication

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TOPAG Lasertechnik GmbH
Nieder-Ramstädter Str. 247
64285 Darmstadt, Germany
Phone: +49 6151 4259 78
Fax: +49 6151 4259 88
E-mail: info@topag.de