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TOPAG Lasertechnik GmbH
Nieder-Ramstädter Str. 247
64285 Darmstadt
Telefon: +49 6151 4259 78
Telefax: +49 6151 4259 88 
E- mail: info [at] topag.de 

NL220 - Serie, hohe Energie

578
NL220 - Serie, elektrooptisch gütegeschaltete Nd:YAG Laser, Dioden-gepumpt

NL220

Die Dioden-gepumpten und rein luftgekühlten Laser der NL220 Serie sind aktiv gütegeschaltet. Die Systeme liefern bei einer Repetitionsrate von 1kHz Pulse mit einer Energie von 10mJ (6-8ns) bzw. 30mJ (28ns). Die fasergekoppelte Pumplichteinspeisung ermöglicht einen kompakten Aufbau mit minimalem Wärmeeintrag und sorgt so für einen stabilen und wartungsfreien Laserbetrieb.

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Tab 1

Features

  • Up to 30mJ at 1064 nm
  • 1 kHz pulse repetition rate
  • Close to TEM₀₀ beam profile
  • Simple and robust all-solid-state design
  • Internal/external triggering
  • Short warm-up time
  • Water-to-air cooling (external water service is not required)
  • Optional temperature stabilized second, third and fourth harmonic generators
  • PC control via USB (RS232 is optional) with supplied LabVIEW™ drivers
  • Remote control via keypad

Applications

  • OPO, Ti:Sapphire and dye laser pumping
  • PIV
  • Laser spectroscopy
  • Material ablation
  • Micromachining

NL220 series diode pumped Q-switched lasers produce up to 30 mJ at a 1 kHz  pulse repetition rate.

The laser is designed to produce high intensity, high brightness pulses and is targeted for applications like OPO, Ti:sapphire or dye laser pumping, nonlinear spectroscopy, material ablation, micromachining, and other tasks.

Employing electro-optical type of Q-switch allows the master oscillator to produce pulses with a short pulse duration of 6 ns, nearly TEM₀₀ beam profile and nearly diffraction-limited divergence. The M² factor of the beam is typically less than 2.5. When lower pulse repetition rates are acceptable, the laser can be configured for a 100 Hz or 200 Hz repetition rate and higher output pulse energy.

Laser cooling uses a closed loop chiller, thus eliminating the need for external cooling water, and reducing running costs.

For PIV applications a double-pulse version of this laser is available. Angle-tuned LBO and/or BBO crystals mounted in temperature stabilized heaters are used for optional second, third or fourth harmonic generation. The harmonics separation system is designed to ensure a high spectral purity of radiation directed to separate output ports.

For customer convenience the laser can be controlled from a user-friendly remote control pad or USB interface. The remote pad allows easy control of all parameters and features a backlit display that is easy to read even wearing laser safety eyewear. Alternatively, the laser can be controlled from a personal computer with supplied software for a Windows™ operating system. LabVIEW™ drivers are supplied as well.

Tab 2
Specifications 1)

Model NL220 NL220-30-1k
Pulse energy:
at 1064 nm 10 mJ 30 mJ
at 532 nm 2) 5 mJ 12 mJ
at 355 nm 3) 3 mJ 7 mJ
at 266 nm 4) 1 mJ 2 mJ
Pulse to pulse energy stability, 5)
at 1064 nm < 1.0 % rms < 1.5 % rms
at 532 nm 2) < 2.0 % rms < 2.5 % rms
at 355 nm 3) < 2.5 % rms < 3.5 % rms
at 266 nm 4) < 4.0 % rms < 6.0 % rms
Pulse duration 6) 6-8 ns ~28 ns
Pulse repetition rate 7) 1000 Hz
Beam profile close to TEM00 , > 90 % Gaussian fit bell-shaped beam profile
Elipticity 0.9-1.1 at 1064 nm
M2 <2.5 8)
Beam divergence9) 2 mrad at 1064 nm
Beam pointing stability <20 µrad rms <25 µrad rms
Polarization linear, vertical at 1064 nm > 95 %
Typical beam diameter10) 2.5 mm 3 mm
Pulse jitter wrt to SYNC OUT 11) <0.5 ns rms
Pulse jitter wrt to ext. trigger12) < 0.5 ns rms
Physical characteristics
Laser head (W×L×H) 455×826×260 mm 318x1035x260 mm
Power supply unit (W×L×H) 365×392×289 mm 552x600x841 mm
Umbilical length 2.5 m
Chiller 13) please inquire, depends on location
Operating requirements
Cooling air cooled air or water cooled
Ambient temperature 18–27 °C
Relative humidity 20-80 % (non-condensing)
Power requirements 100-240 VAC, single phase 50/60 Hz 220-240 VAC, single phase 50/60 Hz
Power consumption < 1 kVA < 2 kVA

1) Due to continuous improvement, all specifications are subject to change without notice. For latest product information please visit EKSPLA. 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) For NL220-SH option. Outputs are not simultaneous. The laser performance is specified for SH wavelength; specifications for other wavelengths may differ from that indicated above.
3) For NL220-TH option. Outputs are not simultaneous. The laser performance is specified for TH wavelength; specifications for other wavelengths may differ from that indicated above.
4) For NL220-FH option. Outputs are not simultaneous. The laser performance is specified for FH wavelength; specifications for other wavelengths may differ from that indicated above.
5) Averaged from 300 pulses.
6) FWHM at 1064 nm, measured with at 5 Gs/s oscilloscope and photodiode with 1 ns rise time.
7) Optional 100 Hz or 200 Hz pulse repetition rate. Pulse energy specifications are 50 % higher for 100 Hz version and 30 % higher for 200 Hz version.
8) M² < 1.5 available on request.
9) Full angle measured at the 1/e² point at 1064 nm.
10) Beam diameter is measured at 1064 nm at the 1/e² point.
11) Optical pulse jitter with respect to SYNC OUT. In internal triggering mode. Typical lead time is 220 ns with respect to optical pulse.
12) Optical pulse jitter with respect to QSW IN. In external triggering mode when triggered with two separate pulses for pump diodes and Q-switch.
13) Available options: water-air or water-water.
Tab 3

Tab 3 Inhalt

Tab 4

Tab 4 Inhalt

Tab 5
Bild 1
 nl220-series-nanosecond-q-switched-dpss-ndyag-lasers
Beschreibung 1
NL220 series nanosecond Q-switched DPSS Nd:YAG lasers
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 nl220-series-high-pulse-energy-at-1-khz-pulse-repetition-rate-lasers1
Beschreibung 2
NL220 series nanosecond q-switched laser pulse waveform
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 nl220-series-nanosecond-q-switched-dpss-ndyag-lasers2
Beschreibung 3
Typical near field beam profile of NL220 series laser
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 nl220-series-nanosecond-q-switched-dpss-ndyag-lasers1
Beschreibung 4
Typical far field beam profile of NL220 series laser
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 nl220-series-high-pulse-energy-at-1-khz-pulse-repetition-rate-lasers4
Beschreibung 5
NL220 series laser head dimensions
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