NT250 series

Tunable Wavelength UV-NIR Range DPSS Lasers

NT250 delivers hands‑free, no-gap tuning from 335 to 2600 nm from the one box.  With its 1000 Hz repetition rate and more than 1.1 mJ output pulse energy in NIR the NT240 series laser establishes itself as an excelllent choice for applications like photoacoustic imaging, laser-induced fluorescence spectroscopy.

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NT250
Overview

Features

  • Customers recognized reliability
  • Two years warranty
  • Integrates DPSS pump laser and OPO into a single housing
  • Dry, no water inside!
  • Hands-free no-gap wavelength tuning from 335 to 2600 nm*
  • 1000 Hz pulse repetition rate
  • More than 1.1 mJ output pulse energy in NIR
  • 1 – 4 ns pulse duration
  • Remote control via key pad or PC

* Automatic wavelength scan is programmable

Applications

  • Photoacoustic imaging
  • Laser-induced fluorescence spectroscopy
  • Pump-probe spectroscopy
  • Photobiology
  • Remote sensing
  • Metrology

Description

NT250 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. Special cooling technology eliminates the need for tap water, 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 also controlled from personal computer using supplied LabVIEW™ drivers.

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

Benefits

  • Hands-free wavelength tuning – no need for physical intervention
  • High repetition rate (1000 Hz) enables fast data collection
  • End diode pumping and water-free technology ensure high reliability and low maintenance costs
  • Superior tuning resolution (1 – 2 cm‑1) allows recording of high quality spectra
  • High integration level saves valuable space in the laboratory
  • In-house design and manufacturing of complete systems, including pump lasers, guarantees on-time warranty and post warranty services and spares supply
  • Variety of control interfaces: USB, RS232, LAN and WLAN ensures easy control and integration with other equipment
  • Attenuator and fiber coupling options facilitate incorporation of NT250 systems into various experimental environments

Specifications

ModelNT252
OPO specifications 1)
Wavelength range
Signal670 – 1064 nm
Idler1065 – 2600 nm
SH335 – 669 nm
Pulse energy
OPO 2)1100 μJ
SH 3)200 µJ
Pulse repetition rate1000 Hz
Pulse duration 4)1 – 4 ns
Linewidth 5)< 10 cm‑1
Minimal tuning step 6)
Signal1 cm‑1
Idler1 cm‑1
SH2 cm‑1
Polarization
Signalhorizontal
Idlervertical
SHhorizontal
Typical beam diameter 7) 8)3 × 6 mm
Pump laser
Pump wavelength 9)532 nm
Typical pump pulse energy 10)4 mJ
Pulse duration 11)2 – 5 ns
Pulse energy stability (StdDev)< 2.5 %
Physical characteristics
Unit size (W × L × H)456 × 1040 × 297 mm
Power supply size (W × L × H)520 × 400 × 286 mm
Umbilical length2.5 m
Operating requirements
Coolingair-cooled
Room temperature18 – 27 °C
Relative humidity20 – 80 % (non-condensing)
Power requirements100 – 240 V AC, single phase, 50/60 Hz
Power consumption< 1.5 kW
Cleanliness of the roomnot worse than ISO Class 9
ModelNT252
  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 750 nm and for basic system without options.
  2. Measured at maximum in the interval 700 – 750 nm. See tuning curves for typical outputs at other wavelengths.
  3. Measured at 400 nm. See tuning curves for typical outputs at other wavelengths.
  4. Measured at FWHM level with photodiode featuring 1 ns rise time and 300 MHz bandwidth oscilloscope.
  5. In signal and idler range.
  6. 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.
  7. Measured at the wavelength indicated in the “Pulse energy” specification row.
  8. Beam diameter is measured at the 1/e² level at the laser output and can vary depending on the pump pulse energy.
  9. Separate output port for the 2nd and other harmonic are optional.
  10. The pump laser pulse energy will be optimized for best OPO performance. The actual pump laser output can vary with each unit we manufacture.
  11. 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.

Accessories and optional items

OptionFeatures
-SHTuning range extension in UV range (335 – 670 nm) by second harmonic generation
-H, -2H1064 and 532 nm output via separate port
-FCFiber coupled output in 350 – 2000 nm range
-ATTNAttenuator output in 335 – 2600 nm range
OptionFeatures

Publications

Optical investigation of gold shell enhanced 25 nm diameter upconverted fluorescence emission

K. Green, J. Wirth, and S. F. Lim, Nanotechnology 27 (13), 135201 (2016). DOI: 10.1088/0957-4484/27/13/135201.

The Pan-STARRS1 photometric system

J. L. Tonry, C. W. Stubbs, K. R. Lykke, P. Doherty, I. S. Shivvers, W. S. Burgett et al., The Astrophysical Journal 750 (2), 99 (2012). DOI: 10.1088/0004-637X/750/2/99.

Precise throughput determination of the panstarrs telescope and the gigapixel imager using a calibrated silicon photodiode and a tunable laser: initial results

C. W. Stubbs, P. Doherty, C. Cramer, G. Narayan, Y. J. Brown, K. R. Lykke et al., The Astrophysical Journal Supplement Series 191 (2), 376 (2010). DOI: 10.1088/0067-0049/191/2/376.

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