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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] 

NL303D - Serie, Doppel Puls

NL303D - Serie, elektrooptisch gütegeschaltete Nd:YAG Laser, Lampen-gepumpt


Zwei Laser unter einem „Dach", speziell entwickelt für „PIV -Particle Image Velocimetry". Das Doppelpuls - Delay kann zwischen 30ns und 7.5ms variiert werden, wobei für 532nm Pulsenergien bis 360mJ erreichbar sind. Es sind Versionen mit 10/20Hz lieferbar. Optional kann auch eine UV-Version angeboten werden. Auf Anfrage: Dioden-gepumptes System mit bis zu 1000Hz!


Bezeichnungen der Tabs

  • Beschreibung
  • Spezifikationen
Tab 1


  • Double-pulsed output at 532 nm, 355 nm or 266 nm
  • Robust design allows easy switching between colors
  • Control electronics allow operation from external trigger or internal trigger electronics
  • Frame-delay (delay between pulses) variable from 30 ns to 7.5 ms
  • Single power supply cabinets
  • May be controlled by keypad or computer (RS232)
  • LabView™ drivers are included
  • Single output for 532 nm, 355 nm and 266 nm
  • Separate output for 1064 nm
  • Intelligent triggering:
    • Internal/external synchronization
    • Triggering for each laser independently
    • Single/double electrical pulse triggering

Stable output specifications, intelligent triggering and easy operation make NL303D series nanosecond lasers an excellent choice for most liquid and many air-based PIV (particle image velocimetry) applications. Extremely low jitter of optical pulse with respect to sync pulse allows reliable synchronization with external equipment. Optional double UV (355 nm) pulse models allow pumping of double‑pulse optical parametric oscillators.

Operating convenience is achieved through versatile triggering capabilities and adjustable delay between pulses. Simple and proven design allows offering of models for the most common as well as novel research needs. Excellent pulse energy stability and beam quality establish Ekspla lasers as ideal for tasks where high precision and exceptional performance are required. Compact power supply and cooling units easily fit under tables thus saving valuable laboratory space. For customer convenience the laser is controlled through either its RS232 type PC interface with LabView™ drivers (included) or a user-friendly remote control keypad. Both options ensure easy control of laser settings.

Tab 2
Specifications 1)

Pulse energy
at 1064 nm 2x400 mJ 2x720 mJ
at 532 nm 2x180 mJ 2x340 mJ
at 355 nm 2x100 mJ 2x190 mJ
at 266 nm 2x40 mJ 2x90 mJ
Pulse energy stability (Std.Dev)
at 1064 nm <1 %
at 532 nm <1.5 %
at 355 nm <3 %
at 266 nm <3.5 %
Pulse repetition rate 10/20 Hz 2)
Pulse duration 3) 3-6 ns
Delay between pulses 4) 30 ns - 7.5 ms
Power drift (StdDev) ± 2 % at 1064 nm
Beam divergence 5) <0.5 mrad
Optical pulse jitter (StdDev) ≤ 0.5 ns
Focusability <2X diffraction limit at 1064 nm
Beam pointing stability ± 50 µrad at 266 nm
Linewidth <1.4 cm-1 at 532 nm
Beam profile "Top Hat" in near and near Gaussian in far fields
Beam diameter 6 mm 8 mm
Polarization horizontal, <90% at 1064 nm

1) Due to continuous improvement, all specifications are subject to changes without advance notice. For latest product information please visit EKSPLA

2) 20 Hz is available, please inquire for detailed specifications.

3) FWHM at 1064 nm.

4) Variable by 125 ns step. Can be adjusted virtually to any value when externally triggered.

5) Full angle at 1/e².

Physical characteristics

Laser head size (WxLxH) 446x1022x205 mm
Power supply/cooling cabinet size (WxLxH) 555x600x460 mm (water-water cooling) (MR-9)
555x600x660 mm (air-water cooling) (MR-12)
Umbilical length 2.5 m

Operating requirements

Model NL301D NL303D
Water consumption (max 20 °C) <10 l/min
Ambient temperature 18-27 °C
Relative humidity 5-80 % (noncondensing)
Power requirements 208-230 VAC, single phase 60 Hz
Powerconsumption <3kVA x 2 = 5 kVA


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