Features
- Up to 1600 mJ 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 and/or 25 ns are optional)
- Temperature stabilized harmonics generator options
- Remote control via keypad
- Laser control from supplied netbook PC via USB port
Applications
- 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 provide up to 1600 mJ 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 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, material processing, 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 (see the description of the –G option below).
The low jitter of the optical pulse with respect to the Q-switch triggering pulse allows for the reliable synchronisation of the laser with 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.
Specifications 1)
| Model |
NL120 |
NL121 |
NL122 |
NL123 |
NL124 |
NL125 |
| Max. pulse energy 2) |
|
| at 1064 nm |
1.9 mJ |
150 mJ |
300 mJ |
600 mJ |
1200 mJ |
1600 mJ |
| at 532 nm3) |
0.9 mJ |
60 mJ |
125 mJ |
250 mJ |
500 mJ |
700 mJ |
| at 355 nm4) |
0.6 mJ |
40 mJ |
80 mJ |
160 mJ |
320 mJ |
450 mJ |
| at 266 nm5) |
0.3 mJ |
15 mJ |
40 mJ |
70 mJ |
100 mJ |
140 mJ |
| Pulse energy stability (Std. Dev), % 6) |
| at 1064 nm |
< 0.5 % |
< 1 % |
| at 532 nm3) |
< 1 % |
< 2 % |
| at 355 nm4) |
< 1.5 % |
< 3 % |
| at 266 nm5) |
< 2 % |
< 5 % |
| Pulse duration at 1064 nm (FWHM) 7) |
2 ± 0.5 ns |
| Repetition rate 8) |
0-50 Hz |
10 or 20 Hz |
10 Hz |
| Linewidth |
≤ 0.02 cm-1 (SLM) |
| Polarization at 1064 nm 9) |
linear |
| Optical pulse jitter (Std. Dev.)10) |
0.2 ns |
| Beam spatial profile11) |
near TEM00, >85 % fit |
"Hat-Top", >70 % fit |
| Typical beam divergence 12) |
<1.5 mrad |
<0.5 mrad |
| Output beam axis height |
180±5 mm |
| Typical beam diameter13) |
~2 mm |
~5 mm |
~6 mm |
~8 mm |
~10 mm |
~12 mm |
| Physical characteristics |
| Laser head size (WxHxL) |
305x260x665 mm |
455x270x820 mm |
455x270x1020 mm |
455x270x1220 mm |
| Electric cabinet size (WxHxL) |
n/a |
550x550x600 mm |
550x830x600 mm |
550x1030x600 mm |
| Umbilical length |
2.5 m |
| Operating requirements |
| Water consumption (max 20 °C) |
air cooled |
<10l/min |
<20l/min |
| Room temperature |
18-27 °C |
| Relative humidity (non-condensing) |
10-80 % |
| Mains requirements 14) |
90-240 V AC, 50-60 Hz |
208 or 240 V AC, single phase 50-60 Hz |
208 or 380 V AC, three phase, 50-60 Hz |
| Power consumption 15) |
< 0.5 kVA |
<1.5 kVA |
<2.5 kVA |
<4 kVA |
<4 kVA |
<5 kVA |
| Model |
NL120 |
NL121 |
NL122 |
NL123 |
NL124 |
NL125 |
1) 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) For NL12x-SH and NL12x-SH/FH options.
4) For NL12x-TH option.
5) For NL12x-SH/FH option.
6) Averaged from 300 pulses.
7) Optional 7 or/and 25 ns pulse duration. Inquire for pulse energy specifications.
8) Pulse repetition rates up to 50 Hz are optional. Inquire for pulse energy specifications.
9) For models without harmonics generators.
10) In respect to Q-switch triggering pulse.
11) Measured at 1 m distance from the laser output. Improved fit beam profile is available (see –G option description).
12) Full angle measured at the 1/e² point at 1064 nm.
13) Beam diameter is measured at 1064 nm at the 1/e² point.
14) Mains should be specified when ordering.
15) 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.
| Model |
NL121G |
NL122G |
NL123G |
NL124G |
| Max. pulse energy |
| at 1064 nm |
60 mJ |
140 mJ |
280 mJ |
550 mJ |
| at 532 nm |
20 mJ |
40 mJ |
80 mJ |
165 mJ |
| at 355 nm |
12 mJ |
30 mJ |
55 mJ |
110 mJ |
| at 266 nm |
3 mJ |
7 mJ |
14 mJ |
30 mJ |
| Typical beam diameter |
~3 mm |
~5 mm |
~7 mm |
~9 mm |
| Beam profile at 1064 nm |
Gaussian fit > 85 % |
Other specifications of the lasers 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.
