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NL940 series
High Energy Temporaly Shaped Nanosecond Nd:YAG Lasers
High energy nanosecond lasers
Temporaly shaped 3 – 10 ns pulses
Pulse energies up to 10 J
10 Hz pulse repetition rate
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문의 02-3461-1103
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NL940 series

High Energy Temporaly Shaped Nanosecond Nd:YAG Lasers
  • High energy nanosecond lasers
  • Temporaly shaped 3 – 10 ns pulses
  • Pulse energies up to 10 J
  • 10 Hz pulse repetition rate

Features & Applications

FEATURES

  • Up to 10 J output energy
  • 10 Hz repetition rate
  • 3 – 10 ns pulse duration
  • 1064 or 532 nm output wavelength
  • Spatial flat top beam profile
  • Fibre front end output amplified in diode pumped regenerative amplifier

APPLICATIONS

  • OPCPA pumping
  • Front end for power amplifiers
  • Ti: Sapphire pumping
  • Laser peening – material hardening by laser-induced shock wave
  • Plasma and shock physics

Description

Main laser feature is output of temporary shaped pulses based on electrooptical modulator driven by programmable arbitrary waveform generator (AWG). Pulse shaping resolution is 125 ps, while maximum pulse length is 10 ns. Start of the system is single mode CW laser. Then light is amplified in fiber amplifier, later AWG driven modulator transmits only required temporal shape and duration pulse which is amplified in diode pumped regenerative amplifier in order to reach energy sufficient to amplify in single-pass flash-lamp pumped amplifiers.

Power amplifier is a chain of single-pass amplifiers where pulse is amplified up to required energy. During amplification spatial beam shaping is used in order to get flat top shape at the output. Optional second/third harmonic generators are based on angle tuned nonlinear crystals placed in temperature stabilized heaters.

Specifications

ModelNL944NL949
MAIN SPECIFICATIONS 1)
Pulse energy (rectangular pulse in time domain 5 ns FWHM)
    at 1064 nm1.6 J10 J
    at 532 nm 2)1 J6 J
Pulse energy stability (StdDev): 3)
    at 1064 nm0.5 %
    at 532 nm1.0 %
Power drift 4)± 2 %
Pulse duration 5)3 – 10 ns
Repetition rate10 Hz
Polarization at 1064 nmvertical, > 90 %
Optical pulse jitter 6)< 30 ps
Linewidth< 1 cm-1
Beam profileHat-Top (at laser output), without diffraction rings
Typical beam diameter 7)~11 mm~33 mm
Beam divergence 8)< 0.5 mrad
Beam pointing stability± 50 µrad
PHYSICAL CHARACTERISTICS
Laser head (W × L × H)750 × 1350 × 300 mm1000 × 2100 × 300 mm
Power supply unit (W × L × H)550 × 600 × 840 mm – 1 unit
550 × 600 × 670 mm – 1 unit
550 × 600 × 1220 mm – 2 units
550 × 600 × 670 mm – 1 unit
Umbilical length3 m
OPERATING REQUIREMENTS
Water consumption (max 20° C)< 8 l/min< 40 l/min
Ambient temperaturestabilized; from range 18-25 °C
Relative humidity20-80 % (non-condensing)
Power requirements 9)208/240 V AC, single phase 50/60 Hz 
or 208/380 V AC, three phases 50/60 Hz
208/380 V AC, three phases 50/60 Hz
Power consumption5.5 kW13.2 / 6.6 kW
  1. Due to continuous improvement, all specifications subject to change without notice. Parameters marked typical may vary with each unit we manufacture.Unless stated otherwise, all specifications are measured at 1064 nm and for basic system without options.
  2. For NL94X-SH harmonics generator option. Harmonics outputs are not simultaneous; only single wavelength beam is present at the output at once. Manual reconfiguration is required to switch wavelength. Third harmonic available on request.
  3. Standard deviation value averaged from 1000 shots after 20 minutes of 
warm-up.
  4. Deviation from average value measured over 8 hours of operation when room temperature variation is less than ±2 °C.
  5. Measured with photodiode with 100 ps rise time and oscilloscope with 600 MHz bandwidth.
  6. Standard deviation value, measured with respect to triggering pulse.
  7. Beam diameter is measured at 1064 nm at laser output at the 1/e² level and can vary with each unit we manufacture.
  8. Full angle measured at the 1/e² level at 1064 nm.
  9. Mains voltage should be specified when ordering.

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.

Performance