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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] topag.de 

NT350 - Serie, abstimmbar

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NT350 - Serie, abstimmbares Nanosekunden Komplettsystem, Lampen-gepumpt

NT350

Die  abstimmbaren Nanosekundenlasern der  NT350-Serie verbinden einen OPO und einen Blitzlampen-gepumpten Pumplaser in einem Gehäuse. Der Wellenlängenbereich liegt zwischen 670-2600nm und ist optional um den Bereich 355-500nm erweiterbar. Die Laser liefern eine Repetitionsrate von 10, 20 oder 30Hz, Ausgangspulsenergien bis zu 125mJ bei einer Pulsbreite 3-5ns. Die Einzellinien des Pumplasers (1064/532nm) sind separat nutzbar.

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Tab 1

Features

  • Hands-free, automated wavelength tuning from 355 to 500nm and 670 to 2600 nm
  • Up to 125 mJ pulse energy in near-IR spectral range
  • Narrow linewidth across tuning range
  • 3–5 ns pulse duration
  • Up 30 Hz pulse repetition rate
  • Remote control pad
  • PC control via RS232 and LabVIEW TM drivers
  • Separate output port for 532 nm beam. Output for 1064 nm is optional
  • OPO pump energy monitoring
  • Replacement of flashlamps can be done without misalignment of the laser cavity
  • Hermetically sealed oscillator cavity protects non-linear crystals from dust and humidity

Applications

  • Photoacoustic imaging
  • Photobiology
  • Remote sensing
  • Time-resolved spectroscopy
  • Non-linear spectroscopy
  • Other laser spectroscopy applications

NT352 series tunable laser seamlessly integrates in a compact housing a nanosecond optical parametric oscillator and Nd:YAG Q-switched laser.

Four models with different output pulse energy values are offered. The most powerful model has more than 125 mJ pulse energy at 800 nm. Narrow linewidth (<10 cm⁻¹) is nearly constant trough whole tuning range, which makes laser suitable for many spectroscopy application.

The device is controlled from the remote keypad or from PC through RS232 interface using LabVIEW™ drivers that are supplied with the system. The remote pad features a backlit display that is easy to read even while wearing laser safety glasses.

System is designed for easy and cost-effective maintenance. Replacement of flashlamps can be done without misalignment of the laser cavity and deterioration of laser performance. OPO pump energy monitoring system helps to increase lifetime of the optical components.

Optional items are available allowing to optimize the laser system for Your application, for example:

  • Fiber coupled output in 670 – 1000 nm range
  • Tuning range extension up to 2600 nm
  • Efficient second harmonics generator for 335 – 500 nm range
  • Pulse energy attenuator
  • Water-air cooled power supply. Please inquire custom-build versions and options.
Tab 2
Specifications 1)

ModelNT352NT352ANT352BNT352C
OPO
Wavelength range
Signal 670-1064 nm
Idler 1065-2600 nm
SH 355-500 nm   
OPO output pulse energy2) 30 mJ 60 mJ 100 mJ 125 mJ
Linewidth <10 cm-1
Scanning step:
Signal (670-1064 nm) 0.1 nm
Idler (1065-2600 nm) 1 nm
SH (355-500 nm) 0.5 nm
Pulse duration3) 3-5 ns
Typical beam diameter4) 6 mm 8 mm 10 mm 12 mm
Typical beam divergence5) < 2 mrad
Polarization
Signal beam horizontal
Idler beam vertical
Pump laser6)
Pump wavelength 532 nm
Max pump pulse energy 110 mJ 230 mJ 400 mJ 500 mJ
Pulse duration 4-6 ns
Beam quality "Hat-top" in near field. Close to Gaussian in far field
Beam divergence < 0.5 mrad
Pulse energy stability (Std. Dev.) < 2.5 %
Pulse repetition rate 10 or 20 Hz 7) 10 or 20 Hz 10 Hz 7)
Physical characteristics
Unit size (WxLxH) 452x610x270 mm 452x1020x270 mm
Power supply size (WxHxL) 330x490x585 mm 550x600x530 mm
Umbilical length 2.5 m
Operating requirements
Water consumption (max 20 °C) 8) 6 l/min 10 l/min
Room temperature 15-30 °C
Relative humidity 20-80 % (non-condensing)
Power requirements 9) 208 or 240 VAC, single phase 50/60 Hz
Power consumption10) 1.8/3.4 kVA 3.4 kVA 5 kVA

1) Due to continuous improvement, all specifications are subject to change without notice. For latest product information please visit EKSPLA. The 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 800 nm.

2) Measured at 800 nm. See tuning curves for typical outputs at other wavelengths.

3) FWHM measured with photodiode featuring 500 ps rise time and 600 MHz bandwidth oscilloscope.

4) Beam diameter is measured at 800 nm at the FWHM level and can vary depending on the pump pulse energy.

5) Full angle measured at the FWHM level at 800 nm.

6) Separate output port for the 532 nm beam is standard. Output for 1064 nm beam is optional. Pump laser output will be optimised for OPO operation and specification may vary with each unit we manufacture.

7) Pulse repetition rates up to 30 Hz are possible. Inquire for pulse energy and other specifications.

8) At 10 Hz pulse repetition rate. Air cooled power supply is available as option.

9) Mains voltage should be specified when ordering. 20 and 30 Hz versions of the laser might require three phase mains.

10) At 10/20 Hz pulse repetition rate. Required current rating might be calculated by dividing power consumption value by mains voltage value.

 

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Tab 3 Inhalt

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Tab 5
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NT350 series tunable wavelength nanosecond lasers 
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Typical output energy of the NT350 series tunable wavelength systems 
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Typical far field beam profile of NT352B laser at 800 nm 
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