NL941 series

High Energy Temporary Shaped DPSS Nanosecond Lasers
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  • High energy nanosecond lasers
  • Temporary shaped 5 – 50 ns pulses
  • Pulse energies up to 2 J
  • 100 Hz pulse repetition rate
  • High energy nanosecond lasers
  • Temporary shaped 5 – 50 ns pulses
  • Pulse energies up to 2 J
  • 100 Hz pulse repetition rate

Models Features

NL941 Features

  • Up to 2 J at 1064 nm output pulse energy
  • Bursts of up to 30 pulses at 1 kHz repetition rate or 4 pulses at 20 kHz repetition rate in 20 sec periods available in burst mode
  • 5 ns pulse duration
  • Spatial flat top beam profile
  • Temporal shaping by pulse processing with electrooptical modulator driven by arbitrary wave generator (AWG)
  • High efficiency diode pumping chambers
  • 1×2 m laser head footprint

NL942-SH Features

  • Two outputs up to 2 J at 1064 nm each
  • Two outputs up to 1 J at 532 nm each
  • 100 Hz repetition rate
  • 50 ns pulse duration
  • Spatial flat top beam profile
  • Temporal shaping by pulse processing with electrooptical modulator driven by arbitrary wave generator (AWG)
  • Internal system diagnostics
  • High efficiency diode pumping chambers
  • Industrial grade, portable laser housing with integrated power supplies and cooling unit

Description

Main laser feature is output of temporary shaped pulses based on electrooptical modulator driven by programable arbitrary wave generator (AWG). Pulse shaping resolution is 125 ps and pulse duration up to 50 ns. Start of the system is a 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 level sufficient to amplify in single-pass / double-pass flash-lamp or diode pumped amplifiers.

Diode pumping enables generating bursts of pulses with up to 20 kHz frequency in burst mode. Power amplifier is a chain of diode pumped single-pass amplifiers where pulse is amplified up to required energy. During amplification spatial beam shaping is employed in order to get a flat top shape at the output. Optional second and third harmonic generators are based on angle tuned nonlinear crystals placed in heaters.

Specifications

ModelNL941NL942-SH
MAIN SPECIFICATIONS 1)
Pulse energy
    at 1064 nm2000 mJ2 × 1700 mJ
    at 532 nm 2) 2 × 900 mJ
Pulse energy stability (StdDev): 3)
    at 1064 nm1.0 %
    at 532 nm2.0 %
Power drift 4)± 2 %
Pulse duration 5)5 ns50 ns
Repetition rate20 kHz100 Hz
Polarization at 1064 nmvertical, > 90 %
Optical pulse jitter 6) < 30 ps
Linewidth < 1 cm-1
Beam profile Hat-Top (at laser output), without diffraction rings
Typical beam diameter 7) ~12 mm ~10 mm
Beam divergence 8) < 0.5 mrad
Beam pointing stability± 50 µrad
PHYSICAL CHARACTERISTICS
Laser head (W × L × H)1000 × 2000 × 400 mm1000 × 2000 × 1800 mm
Power supply unit (W × L × H)550 × 600 × 500 mm
Umbilical length3 m
OPERATING REQUIREMENTS
Facility water consumption (max 20° C)8 l/min 20 l/min
Ambient temperature stabilized; from range 18 – 25 °C
Relative humidity 20 – 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 consumption 2.0 kW9.4 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.
  2. For NL94X-SH harmonics generator option. Harmonics outputs are not simultaneous; only single wavelength beam is present at the output at once.
  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.

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