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 3 – 7 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 3 – 7 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 3 – 7 ns range
  • Variable reflectivity output coupler for low-divergence beam
  • Quiet operation: no more flashlamp firing sound
  • Air cooled
  • Remote control via keypad and/or PC via USB (RS232 optional) port with supplied LabVIEW™ drivers
  • Optional temperature-stabilized second and third harmonic generators

Applications

  • OPO, Ti:Sapphire and dye laser pumping
  • Mass Spectroscopy
  • Remote Sensing
  • LIDAR (Light Detection And Ranging)
  • LIF (Light Induced Fluorescence)
  • LIBS (Light Induced Breakdown Spectroscopy)
  • ESPI (Electronic Speckle Pattern Interferometry)

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 material ablation, remote sensing, OPO, Ti:Sapphire or dye laser pumping. Due to an electro‑optical Q-switch, the master oscillator generates short duration pulses in the 3 – 7 ns range. The oscillator cavity optical design features a variable‑reflectivity output coupler, giving a low-divergence laser beam.

A closed-loop 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 a USB interface. 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)3 – 7 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 10) ≤60 µrad rms
Polarizationlinear, >95% at 1064 nm
Typical beam diameter 11) 5 mm
Optical pulse jitter
    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 time5 min
PHYSICAL CHARACTERISTICS
Laser head size (W × L × H)221 × 425 × 162 mm ± 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 fourth 266 nm and fifth 213 nm harmonic specifications.
  3. With H230SHC or H230STHC harmonics 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

Ordering information

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