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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 

NT342 - Serie, abstimmbar

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NT342 - Serie, abstimmbares Nanosekunden Komplettsystem, Lampen-gepumpt

NT342

Die abstimmbaren Nanosekundenlaser der Serie NT342 bestehen aus einem mit OPO und einem Blitzlampen-gepumpten Nd:YAG Pumplaser. Sie bieten nahezu „nahtloses“ Wellenlängen-Tuning im Bereich von 192nm bis 2600nm, eine Repetitionsrate von 10, 20 oder 30 Hz und eine Pulsenergie von bis zu 50mJ. Die Pulsdauer liegt bei 3-5ns. Zudem sind die Einzellinien des Pumplasers (1064/532/355 nm) separat nutzbar.

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Tab 1

Features

  • Hands-free no gap wavelength tuning from 192 to 2600 nm
  • Up to 50 mJ pulse energy in visible spectral range
  • Up to 10 mJ pulse energy in UV spectral range
  • Less than 5 cm⁻¹ linewidth
  • 3–5 ns pulse duration
  • Up to 30 Hz pulse repetition rate
  • Remote control pad
  • PC control via RS232 and LabVIEW™ drivers
  • Optional separate shared output port for 355/532/1064 nm beam
  • OPO pump energy monitoring
  • Replacement of flashlamps without misalignment of the laser cavity
  • Hermetically sealed oscillator cavity protects non-linear crystals from dust and humidity

Applications

  • Laser-induced fluorescence
  • Flash photolysis
  • Photobiology
  • Remote sensing
  • Time-resolved spectroscopy
  • Non-linear spectroscopy

The NT342 series tunable wavelength nanosecond laser seamlessly integrates the nanosecond optical parametric oscillator and the Nd:YAG Q-switched nanosecond laser – all in a compact housing.

The main system features are: hands-free wavelength tuning from UV to IR, high conversion efficiency, optional fiber-coupled output and separate output port for pump laser beam. Narrow bandwidth models have a linewidth of less than 5 cm⁻¹, which is ideal for many spectroscopic applications.

The laser is designed for convenient use. It can be controlled from remote keypad or from a PC through an RS232 interface using LabView™ drivers that are supplied with the system. The remote keypad features a backlit display that is easy to read even through laser safety googles. The OPO pump energy monitoring system helps to control pump laser parameters. Replacement of laser flashlamps can be done without misalignment of the laser cavity and/or deterioration of laser performance.

Tuning range extending optional add-ons:

OptionFeature
-SH Second harmonic generator for 210 – 409 nm range
-SF Sum-frequency generator for 300 – 409 nm range with high pulse energy
-SH/SF Combined option for highest pulse energy in 225 – 409 nm range
-DUV Deep UV option for 192 – 210 nm range

Accessories and other optional add-ons:

OptionFeatures
-FC Fiber coupled output in 350 – 2000 nm range
-ATTN Pulse energy attenuator
-H, -2H Separate shared output port for Nd:YAG pump laser harmonics (532 or 1064 nm wavelengths)
-AW Air cooled power supply

 

 

Tab 2
Specifications 1)

Model NT342A NT342B NT342C
OPO
Wavelength range2)
Signal 410-709 nm 3)
Idler 710-2600 nm
SH generator (optional) 210-409 nm
SH/SF generator (optional) 210-409 nm
DUV generator (optional) 192-209 nm
Output pulse energy
OPO 4) 15 mJ 30 mJ 50 mJ
SH generator (optional) 5) 2 mJ 4 mJ 6.5 mJ
SH/SF generator (optional) 6) 3 mJ 6 mJ 10 mJ
DUV generator (optional) 7) 0.3 mJ 0.6 mJ 1 mJ
Linewidth <5 cm-1 8)
Scanning step 9)
Signal (410-709 nm) 0.1 nm
Idler (710-2600 nm) 1 nm
SH/SF/DUV beam (192-409 nm) 0.05 nm
Pulse duration 10) 3-5 ns
Typical beam diameter 11) 4 mm 5 mm 7 mm
Typical beam divergence 12) <2 mrad
Polarization
Signal beam horizontal
Idler beam vertical
SH/SF/DUV beam horizontal
Pump laser 13)
Pump wavelength 355 nm
Max pump pulse energy 50 mJ 100 mJ 150 mJ
Pulse duration 4-6 ns
Beam quality "Hat-Top" in near field, without hot spots
Beam divergence <0.6 mrad
Pulse energy stability (Std.Dev) <3.5 %
Pulse repetition rate 10 or 20 Hz 14) 10 or 20 Hz 10 Hz
Physical characteristics
Unit size (WxLxH) 15) 452x800x270 mm
Power supply size (WxLxH) 330x490x585 mm
Umbilical length 2.5 m
Operating requirements
Water consumption (max 20 °C) 16) 6 l/min
Room temperature 15-30 °C
Relative humidity 20-80 % (non-condensing)
Mains voltage 208 or 240 VAC, single phase 50/60 Hz
Power consumption 17) 1.8/3.4 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) Hands-free tuning range is from 192 nm to 2600 nm.
3) Tuning range extension to 400 – 709 nm is optional.
4) Measured at 450 nm. See tuning cur ves for typical outputs at other wavelengths.
5) Measured at 260 nm. See tuning curves for typical outputs at other wavelengths.
6) Measured at 340 nm. SF generator is optimized for maximum output in 300 – 409 nm range. See tuning curves for typical outputs at other wavelengths.
7) Measured at 200 nm.
8) Linewidth is <8 cm⁻¹ for 210 – 409 nm range.
9) Represents wavelength change quantum for manual input from control pad. When wavelength is controlled from PC, the wavelength set precision is ~1 cm⁻¹ in OPO range and ~2 cm⁻¹ in SH/SFG range.
10) FWHM measured with photodiode featuring 1 ns rise time and 300 MHz bandwidth oscilloscope.
11) Beam diameter is measured at 450 nm at the FWHM level and can vary depending on the pump pulse energy.
12) Full angle measured at the FWHM level at 450 nm.
13) Separate output port for the 355 nm beam is standard. Outputs for 1064 nm and 532 nm beams are optional. Laser output will be optimised for OPO operation and specifications may vary with each unit we manufacture.
14) 30 Hz version is available. Inquire for pulse energy specifications.
15) Version with DUV generator has dimensions of 452 × 1020 × 270 mm (W × L × H).
16) At 10 Hz pulse repetition rate. Air cooled power supply is available.
17) At 10/20 Hz pulse repetition rate.
Tab 3

Tab 3 Inhalt

Tab 4

Tab 4 Inhalt

Tab 5
Bild 1
 NT342
Beschreibung 1
NT342 series tunable wavelength lasers 
Bild 2
 NT342 output energy
Beschreibung 2
Typical output energy of the NT342 series nanosecond tunable wavelength lasers 
Bild 3
 NT342 output energy SH DUV
Beschreibung 3
Typical output energy of the NT342 series tunable wavelength systems with SH/DUV extension
Bild 4
 NT342 beam profile
Beschreibung 4
Typical far field beam profile of NT342 laser
Bild 5
 NT342 drawing front
Beschreibung 5
NT342 series laser head typical outline drawing, front view
Bild 6
 NT342 drawing top side
Beschreibung 6
NT342 series laser head typical outline drawing, side and top view
Bild 7
 
Beschreibung 7
 
Bild 8
 
Beschreibung 8
 
Bild 9
 
Beschreibung 9
 
Bild 10
 
Beschreibung 10