NL230 series

High Energy Q-switched DPSS Nd:YAG Lasers
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  • Compact high energy and repetition rate nanosecond lasers
  • Up to 190 mJ energy
  • Up to 100 Hz repetition rate
  • Pulse duration in the 2 – 4 ns range
  • Compact high energy and repetition rate nanosecond lasers
  • Up to 190 mJ energy
  • Up to 100 Hz repetition rate
  • Pulse duration in the 2 – 4 ns range

Features & Applications

Features

  • Diode-pumped
  • Rugged sealed laser cavity
  • Up to 190 mJ at 1064 nm pulse energy
  • Up to 100 Hz pulse repetition rate
  • Short pulse duration in the 2 – 4 ns range
  • Variable reflectivity output coupler for low-divergence beam
  • Quiet operation: no more flashlamp firing sound
  • Remote control via keypad and/or PC with supplied LabVIEW™ drivers
  • Optional temperature-stabilized second and third harmonic generators

Benefits

  • Short duration pulses (2 – 4 ns) ensures strong interaction with material and are highly suitable for LIBS
  • User selectable wavelength single axis output is superior for experiments where alternating wavelengths are required such as material ablation and LIBS
  • Rugged, monolithic design enables usage in harsh environments
  • Diode pumped design provides quiet operation and eliminates flashlight irritation
  • Variety of interfaces: USB, RS232, LAN and WiFi ensures easy control and integration with other equipment

Applications

  • LIBS (Light Induced Breakdown Spectroscopy)
  • Material ablation
  • OPO pumping
  • Remote Sensing
  • LIDAR (Light Detection And Ranging)
  • Mass Spectroscopy
  • LIF (Light Induced Fluorescence)

Description

The NL230 series diode-pumped Q-switched lasers produce up to 150 mJ at 100 Hz or up to 190 mJ at 50 Hz pulse repetition rate. Diode pumping allows maintenance-free laser operation for an extended period of time (more than 3 years for an estimated eight working hours per day). The typical pump diode lifetime is more than 1 billion shots.

Lasers are designed to produce high-intensity, high-brightness pulses and are targeted for applications such as LIBS, material ablation, remote sensing, OPO pumping. Due to an electro optical Q-switch, the master oscillator generates short duration pulses in the 2 – 4 ns range. The oscillator cavity optical design features a variable reflectivity output coupler, giving a low-divergence laser beam.

A closed-loop air-cooled chiller is used for laser cooling, eliminating the need for external cooling water and reducing running costs.

Angle-tuned non-linear crystals mounted in temperature stabilized heaters are used for optional second or third harmonic generation. The harmonic separation system is designed to ensure radiation with a high spectral purity and to direct it to the separate output ports.

For customer convenience the laser can be controlled via a remote control pad or PC. The remote pad allows easy control of all parameters and features a backlit display that is easy to read even through laser safety eyewear. Alternatively, the laser can be controlled from a personal computer via supplied Windows™ compatible software. LabVIEW™ drivers are also included with each laser installation package.

Specifications

ModelNL231-50NL231-100
MAIN SPECIFICATIONS 1)
Pulse energy (not less than) 2)
    at 1064 nm 190 mJ150 mJ
    at 532 nm 3)110 mJ90 mJ
    at 355 nm 4)55 mJ40 mJ
Pulse energy stability (StdDev) 5)
    at 1064 nm <1 %
    at 532 nm<2.5 %
    at 355 nm<3.5 %
Pulse repetition rate50 Hz100 Hz
Power drift 6)< ±1 %
Pulse duration 7)2 – 4 ns
Linewidth <1 cm-1 at 1064 nm
Beam profile 8)"Top Hat" in near field and close to Gaussian in far field
Beam divergence 9)<0.8 mrad
Beam pointing stability (StDev) 10) ≤60 µrad
Polarizationlinear, >95% at 1064 nm
Typical beam diameter 11) 5 mm
Optical pulse jitter (StDev)
    Internal triggering regime 12) <0.5 ns rms
    External triggering regime 13) <0.5 ns rms
SYNC OUT pulse delay-100 µs ... 100 ms
Typical warm-up time10 min
PHYSICAL CHARACTERISTICS
Laser head size (W × L × H)251 × 291 × 167 ± 3 mm
Power supply unit (W × L × H)
    Desktop case471×391×147 mm ± 3 mm
    19" module483×355×133 mm ± 3 mm
    External chiller (where applicable)inquire
Umbilical length2.5 m
OPERATING REQUIREMENTS
Cooling (air cooled)14) external chiller
Ambient temperature18 – 27 °C
Relative humidity (non-condensing)20 – 80 %
Power requirements100 – 240 VAC, single phase, 50/60 Hz
Power consumption<1 kVA
  1. Due to continuous improvement, all specifications are subject to change. The 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. Outputs are not simultaneous. Inquire for higher energy (up to 350 mJ at 50 Hz, 250 mJ at 100 Hz) custom models.
  3. With H230SHC or H230STHC harmonic generator module.
  4. With H230THC or H230STHC generator modules.
  5. Averaged from pulses, emitted during 30 sec time interval.
  6. Measured over 8 hours period after 20 min warm-up when ambient temperature variation is less than ± 2 °C.
  7. FWHM.
  8. Near field (at the output aperture) TOP HAT fit is >80%.
  9. Full angle measured at the 1/e² level.
  10. Beam pointing stability is evaluated as movement of the beam centroid in the focal plane of a focusing element.
  11. Beam diameter is measured at 1064 nm at the 1/e² level.
  12. With respect to SYNC OUT pulse.
  13. With respect to QSW IN pulse.
  14. Adequate room air conditioning should be provided.

Notes: The laser and auxiliary units must be settled in such a place void of dust and aerosols. It is advisable to operate the laser in air conditioned room, provided that the laser is placed at a distance from air conditioning outlets. The laser should be positioned on a solid worktable. Access from one side should be ensured. Intensive sources of vibration should be avoided near the laboratory (ex. railway station or similar).

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 & Drawings

Publications

Found total :
3 articles, 3 selected
Application selected :
All Applications
All Applications
Laser Spectroscopy
LIBS – laser induced breakdown spectroscopy
Material Processing (Industrial)
Micromachining (Industrial)
Nanoparticles Generation

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

Engineering electrochemical sensors using nanosecond laser treatment of thin gold film on ITO glass

Related applications:  Material Processing (Industrial) Nanoparticles Generation

Authors:  E. Stankevičius, M. Garliauskas, L. Laurinavičius, R. Trusovas, N. Tarasenko, R. Pauliukaitė

Direct generation of gold nanoparticles on ITO glass using a nanosecond laser is presented and the electrochemical properties of the gold modified ITO electrodes for detection of the ascorbic acid are analyzed. Gold nanoparticles were generated by nanosecond laser pulse irradiation of thin, 3–30 nm thick, gold films. It was found that diameters and the number of generated nanoparticles per unit area strongly depends on the thickness of the gold film when it is less than 10 nm. Furthermore, experiments have shown that the influence of laser processing parameters (the laser pulse energy and pulse number) to the size, the distribution and the area density of generated gold nanoparticles on ITO glass is negligible. Characterization of the electrochemical properties of the gold modified ITO electrodes by nanosecond laser showed that the fabricated electrodes could be employed in electrochemical sensing. Therefore, the demonstrated generation of gold nanoparticles on ITO by using the nanosecond laser approach opens new opportunities for the development of highly sensitive and low-cost electrochemical sensors.

Published: 2019.   Source: Electrochimica Acta 297, 511-522 (2019)

Laser Induced Breakdown Spectroscopy and Applications Toward Thin Film Analysis

Related applications:  Laser Spectroscopy LIBS

Authors:  T. N. Owens

Laser induced breakdown spectroscopy (LIBS) provides the opportunity to analyze almost any element, from any material, in any environment. Among the many applications of LIBS is the analysis of thin lms and multilayered structures. An automated system was designed and built to conduct LIBS using Nd:YAG and Ti:Sapphire lasers, broadband and high-resolution spectrometers and detectors. This system incorporates the sample manipulation as well as laser and spectrometer control and timing. A series of experiments were conducted to analyze the ability of nanosecond and femtosecond lasers to detect Mg impurities in thin TiO2 lms using LIBS. It was determined that optimal detection occurs early in the plasma ionic/atomic emission with detection capabilities in the parts-per-million range. Another series of experiments were conducted using LIBS to analyze thin transparent organic lms, with speci c emphasis on the e ect of lm thickness and interplay between lm and substrate. The challenges of ablating and measuring multiple layers have also been explored using various laser wavelengths. The e ectiveness of LIBS has been demonstrated for depth pro ling of CIGS solar cells. Ablation crater and ablation threshold analysis aided in understanding and overcoming some of the obstacles in depth pro ling. One of the challenges with LIBS is the identi cation and mitigation of matrix e ects. This problem was explored using a Mg tracer element and various compositions of the suspected elements Si, Ca, and Sr which can cause errors in LIBS analysis. The goal of this dissertation is to investigate the ability of LIBS to conduct detailed thin lm analysis for a variety of materials and potential applications. This includes analyzing trace elements from a traditionally noisy background, measuring dicult to ablate thin lms, and the unique challenges associated with multilayered structures.

Published: 2011.   Source: UC Berkeley Electronic Theses and Dissertations

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