NL120 series

SLM Q-switched Nd:YAG Lasers
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  • 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

Features

  • 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 10 Hz pulse repetition rate
  • 2 ns pulse duration (7, 10 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

Description

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) harmonic generators provide access to shorter wavelengths. The laser is controlled by a supplied PC via USB port with application for Windows™ operating system.

In addition, the main settings of the laser can be controlled through an auxiliary remote control pad. The remote pad features a backlit display that is easy to read even when wearing laser safety eyewear.

Specifications

Model NL125NL128NL129
MAIN SPECIFICATIONS 1)
Pulse energy 2)
    at 1064 nm1600 mJ5000 mJ10000 mJ
    at 532 nm 4)700 mJTBA 3)
    at 355 nm 5)450 mJTBA 3)
    at 266 nm 6)140 mJTBA 3)
Pulse energy stability (StdDev) 7)
    at 1064 nm<1 %
    at 532 nm 4)<2 %
    at 355 nm 5)<3 %
    at 266 nm 6)<5 %
Pulse duration at 1064 nm (FWHM) 8)2 ± 0.5 ns (7, 10 or 25 ns are optional)
Pulse repetition rate10 Hz
Linewidth≤0.02 cm⁻¹ (SLM)
Polarization at 1064 9)linear, >90 %
Optical pulse jitter (StdDev) 10)<0.2 ns
Beam spatial profile 11)Hat-Top, >70 % fit
Typical beam divergence 12)<0.5 mrad
Beam pointing stability 13)<25 μrad
Typical beam diameter 14)~12 mm~20 mm~25 mm
PHYSICAL CHARACTERISTICS
Laser head size (W × L × H)455 × 1220 × 270 mm600 x 1500 x 300 mm600 x 2000 x 300 mm
Power supply size (W × L × H)550 × 600 × 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)<20 l/min
Ambient temperature22 ± 2 °C
Relative humidity 10 – 80 % (non-condensing)
Power requirements 15)220, 380 or 400 V AC, three-phase 50/60 Hz
Power consumption< 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 and for basic system without options.
  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 over 30 s.
  8. Optional 7, 10 or 25 ns pulse duration. Inquire for pulse energy specifications.
  9. For models without harmonic generators.
  10. With respect to Q-switch triggering pulse.
  11. Measured at 1 m distance from the laser output. Improved Gaussian fit beam profile is available (contact Ekspla for details).
  12. Full angle measured at the 1/e² point at 1064 nm.
  13. Full angle, rms measured over 30 s.
  14. Beam diameter is measured at 1064 nm at the 1/e² level.
  15. Mains 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.

Options

-P7, -P10 and -P25 options — 7 ns, 10 ns or 25 ns pulse duration

For applications requiring longer pulse duration the laser master oscillator cavity can be modified to produce 7 ns, 10 ns or 25 ns pulses. Note: some of other specifications can be changed. Please contact Ekspla for detailed datasheets.

-G option

Provides beam profile optimized for applications requiring smooth, without hot spots beam profile in the near and medium field. Pulse energies are typically lower in comparison to standard version.

Publications

Found total :
2 articles, 2 selected
Application selected :
All Applications
All Applications
Scientific Applications
High Intensity Sources – laser produced plasma, x-ray source
Laser Spectroscopy
LIBS – laser induced breakdown spectroscopy

Development and characterization of a laser-plasma soft X-ray source for contact microscopy

Related applications:  High Intensity Sources

Authors:  M.G. Ayele, P.W. Wachulak, J. Czwartos, D. Adjei, A. Bartnik, Ł. Wegrzynski, M. Szczurek, L. Pina, H. Fiedorowicz

In this work, we present a compact laser-produced plasma source of X-rays, developed and characterized for application in soft X-ray contact microscopy (SXCM). The source is based on a double stream gas puff target, irradiated with a commercially available Nd:YAG laser, delivering pulses with energy up to 740 mJ and 4 ns pulse duration at 10 Hz repetition rate. The target is formed by pulsed injection of a stream of high-Z gas (argon) into a cloud of low Z-gas (helium) by using an electromagnetic valve with a double nozzle setup. The source is designed to irradiate specimens, both in vacuum and in helium atmosphere with nanosecond pulses of soft X-rays in the ‘‘water-window” spectral range. The source is capable of delivering a photon fluence of about 1.09 x 103 photon/µm2/pulse at a sample placed in vacuum at a distance of about 20 mm downstream the source. It can also deliver a photon fluence of about 9.31 x 102 - photons/µm2/pulse at a sample placed in a helium atmosphere at the same position. The source design and results of the characterization measurements as well as the optimization of the source are presented and discussed. The source was successfully applied in the preliminary experiments on soft X-ray contact microscopy and images of microstructures and biological specimens with ~80 nm half-pitch spatial resolution, obtained in helium atmosphere, are presented.

Published: 2017.   Source: Nuclear Instruments and Methods in Physics Research B 411 (2017) 35–43

Enhancement of Laser-Induced Breakdown Spectroscopy (LIBS) Detection Limit Using a Low-Pressure and Short-Pulse Laser-Induced Plasma Process

Related applications:  Laser Spectroscopy LIBS

Authors:  Z. Zhen Wang, Y. Deguchi, M. Kuwahara, J. Jie Yan, J. Ping Liu

Laser-induced breakdown spectroscopy (LIBS) technology is an appealing technique compared with many other types of elemental analysis because of the fast response, high sensitivity, real-time, and noncontact features. One of the challenging targets of LIBS is the enhancement of the detection limit. In this study, the detection limit of gas-phase LIBS analysis has been improved by controlling the pressure and laser pulse width. In order to verify this method, low-pressure gas plasma was induced using nanosecond and picosecond lasers. The method was applied to the detection of Hg. The emission intensity ratio of the Hg atom to NO (IHg/ INO) was analyzed to evaluate the LIBS detection limit because the NO emission (interference signal) was formed during the plasma generation and cooling process of N2 and O2 in the air. It was demonstrated that the enhancement of IHg/INO arose by decreasing the pressure to a few kilopascals, and the IHg/INO of the picosecond breakdown was always much higher than that of the nanosecond breakdown at low buffer gas pressure. Enhancement of IHg/INO increased more than 10 times at 700 Pa using picosecond laser with 35 ps pulse width. The detection limit was enhanced to 0.03 ppm (parts per million). We also saw that the spectra from the center and edge parts of plasma showed different features. Comparing the central spectra with the edge spectra, IHg/INO of the edge spectra was higher than that of the central spectra using the picosecond laser breakdown process.

Published: 2013.   Source: Applied Spectroscopy 67(11):1242-51

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