NL120 series

SLM Q-switched Nd:YAG lasers

 /  Single longitudinal mode high energy nanosecond lasers

 /  up to 10 J pulse energies

 /  2 ns  pulse duration

 /  10 Hz pulse repetition rate

 /  Single longitudinal mode high energy nanosecond lasers

 /  up to 10 J pulse energies

 /  2 ns  pulse duration

 /  10 Hz pulse repetition rate

Features & Applications


  • Up to 10 J pulse energy
  • Diode-pumped, self-seeded Single Longitudinal Mode (SLM) master oscillator
  • Stable master oscillator cavity producing TEM₀₀ spatial mode output
  • Excellent pulse energy stability
  • Up to 50 Hz pulse repetition rate
  • 2 ns pulse duration (7 or 25 ns are optional)
  • Temperature stabilized harmonics generator options
  • Remote control via keypad
  • Laser control from supplied netbook PC via USB port


  • Material processing
  • OPO, OPCPA, Ti:Sapphire, dye laser pumping
  • Holography
  • Nonlinear laser spectroscopy
  • Optics testing


NL120 series electro-optically Q-switched nanosecond Nd:YAG lasers deliver up to 10 J per pulse with excellent stability. The innovative, diode‑pumped, self‑seeded master oscillator design results in Single Longitudinal Mode (SLM) output without the use of external expensive narrow linewidth seed diodes and cavity‑locking electronics. Unlike more common designs that use an unstable laser cavity, the stable master oscillator cavity produces a TEM₀₀ spatial mode output that results in excellent beam properties after the amplification stages.

NL120 series Q-switched nanosecond lasers are an excellent choice for many applications, including OPO, OPCPA or dye laser pumping, holography, LIF spectroscopy, remote sensing, optics testing and other tasks. For tasks that require a smooth and as close as possible to the Gaussian beam profile, models with improved Gaussian fit are available). The low jitter of the optical pulse with respect to the Q-switch triggering pulse allows the reliable synchronization between the laser and external equipment. The optional second (SH) (for 532 nm), third (TH) (for 355 nm) and fourth (FH) (for 266 nm) harmonics generators provide access to shorter wavelengths.

The laser is controlled by a supplied netbook PC via USB port with application for Windows™ operating system. In addition, the main settings of the laser can be controlled through an auxiliary user-friendly remote control pad. The remote pad features a backlit display that is easy to read even when wearing laser safety eyewear.


Model NL120 NL121 NL122NL123NL124NL125NL128NL129
Main specifications 1)
Pulse energy 2)
    at 1064 nm1.9 mJ150 mJ300 mJ600 mJ1200 mJ1600 mJ5000 mJ10000 mJ
    at 532 nm 4)0.9 mJ60 mJ125 mJ250 mJ500 mJ700 mJTBA 3)TBA 3)
    at 355 nm 5)0.6 mJ40 mJ80 mJ160 mJ320 mJ450 mJTBA 3)TBA 3)
    at 266 nm 6)0.3 mJ15 mJ40 mJ70 mJ100 mJ140 mJTBA 3)TBA 3)
Pulse energy stability (StdDev) 7)
    at 1064 nm&lt ;0.5 %< 1 %
    at 532 nm 4)< 1 %< 2 %
    at 355 nm 5)< 1.5 %< 3 %
    at 266 nm 6)< 2 %< 5 %
Pulse duration at 1064 nm (FWHM) 8)2 ± 0.5 ns
Pulse repetition rate 9)0 – 50 Hz10 or 20 Hz10 Hz
Linewidth≤ 0.02 cm-1 (SLM)
Polarization at 1064 10)linear, > 90%
Optical pulse jitter (StdDev) 11)< 0.2 ns
Beam spatial profile 12)near TEM00, > 85 % fitHat-Top, > 70 % fit
Typical beam divergence 13)< 1.5 mrad< 0.5 mrad
Beam pointing stability 14)< 25 µrad
Typical beam diameter 15)~2 mm~5 mm~6 mm~8 mm~10 mm~12 mm~20 mm~27 mm
Physical characteristics
Laser head size (W × L × H)305 x 665 x 260 mm455 x 820 x 270 mm455 x 1020 x 270 mm455 x 1220 x 270 mm600 x 1500 x 300 mm600 x 2000 x 300 mm
Power supply size (W × L × H)n/a550 x 600 x 550 mm550 x 600 x 830 mm550 x 600 x 1030 mm550 x 600 x 1030 mm 2 units550 x 600 x 1650 mm 2 units
Umbilical length2.5 m
Operating requirements
Water consumption
(max 20 °C)
air cooled< 10 l/min< 20 l/min
Ambient temperature18 – 27 °C
Relative humidity 10 – 80 % (non-condensing)
Power requirements 16)90-240 V AC, 50/60 Hz208 or 240 V AC, single phase 50/60 Hz208 or 380 V AC, three phase 50/60 Hz
Power consumption 17)< 0.5 kVA< 1.5 kVA< 2.5 kVA< 4 kVA< 4 kVA< 5 kVA< 8 kVA< 10 kVA


1) Due to continuous improvement, all specifications are subject to change without notice. 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 1064 nm.
2) Outputs are not simultaneous.
3) Contact EKSPLA for more information.
4) For NL12×-SH and NL12×-SH/FH options.
5) For NL12×-TH option.
6) For NL12×-SH/FH option.
7) Averaged from 300 pulses.
8) Optional 7 or 25 ns pulse duration. Inquire for pulse energy specifications.
9) Pulse repetition rates up to 50 Hz are optional. Inquire for pulse energy specifications.
10) For models without harmonics generators.
11) With respect to Q-switch triggering pulse.
12) Measured at 1 m distance from the laser output. Improved fit beam profile is available (see –G option description).
13) Full angle measured at the 1/e² point at 1064 nm.
14) Full angle, 300 shoots, RMS.
15) Beam diameter is measured at 1064 nm at the 1/e² level.
16) Mains should be specified when ordering.
17) For 10 Hz pulse repetition rate.


-G option  —  >85 % Gaussian fit beam profile in near field

Pulse energies are presented in the table bellow. Beam profile has lower beam intensity modulation when propagated over long distance. Recommended when application require homogenous, without hot spots, light intensity distribution.

Max. pulse energy
    at 1064 nm60 mJ140 mJ280 mJ550 mJ
    at 532 nm20 mJ40 mJ80 mJ165 mJ
    at 355 nm12 mJ30 mJ55 mJ110 mJ
    at 266 nm3 mJ7 mJ14 mJ30 mJ
Typical beam diameter~3 mm~5 mm~7 mm~9 mm
Beam profile at 1064 nmGaussian fit > 85 %

Other lasers’ specifications remain the same.


-P7 and -P25 options  —  7 or 25 ns pulse duration

For applications requiring longer pulse duration the laser master oscillator cavity can be modified to produce 7 or 25 ns pulses. Note: some of other specifications can be changed. Please contact Ekspla for detailed datasheets.


Ordering information

NL120 ordering information

NL120 ordering information

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