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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] 

PL2230 - Serie, DPSS

PL2230 - Serie, DPSS Nd:YAG Laser


Die Laser der PL2230 Serie sind vollständig diodengepumpte modengekoppelte Hochenergie-Laser und besitzen einen Oszillator in Kombination mit regenerativem Verstärker sowie Endverstärker. Eine gelungene Synthese aus höchster Strahlqualität und Stabilität eines DPSS-Oszillators und diodengepumpten Verstärkerstufen mit beachtlichen Leistungsdaten (z.B. 35mJ/50Hz/28ps).


Bezeichnungen der Tabs

  • Beschreibung
  • Spezifikationen
  • Optionen
  • Bilder
Tab 1


  • Beam profile improvement using advanced beam shaping system
  • Hermetically sealed DPSS master oscillator
  • Diode pumped regenerative amplifier
  • Diode pumped power amplifier producing up to 35 mJ per pulse (140 mJ preliminary) at 1064 nm
  • Air-cooled
  • < 28 ps pulse duration
  • Excellent pulse duration stability
  • Up to 100 Hz repetition rate
  • Streak camera triggering pulse with < 10 ps jitter
  • Excellent beam pointing stability
  • Thermo stabilized second, third or fourth harmonic generator options
  • PC control trough USB and with supplied LabView™ drivers
  • Remote control via keypad


  • Time resolved spectroscopy
  • SFG/SHG spectroscopy
  • Nonlinear spectroscopy
  • OPG pumping
  • Remote laser sensing
  • Satellite ranging
  • Other spectroscopic and nonlinear optics applications

Ekspla is proud to introduce the first commercial fully diode-pumped high pulse energy mode-locked laser producing 28 ps pulses with up to 35 mJ (preliminary version with 50 mJ) at 50 Hz pulse repetition rate.

Innovative design

The heart of the system is a diode-pumped solid-state (DPSS) master oscillator placed in a sealed monolithic block. At a high repetition rate, it produces pulse trains (88 MHz) with a low single pulse energy of several nanojoule. Diode-pumped amplifiers are used for amplification of the pulse to 35 mJ (140 mJ preliminary) output. The high‑gain regenerative amplifier has an amplification factor in the proximity of 106. After the regenerative amplifier, the pulse is directed to a multipass power amplifier. It is optimised for efficient extraction of stored energy from the Nd:YAG rod while maintaining a near Gaussian beam profile and low a wavefront distortion. The output pulse energy can be adjusted in approximately 1 % steps while pulse‑to-pulse energy stability remains at less than 0.5 % rms at 1064 nm.

Angle-tuned KD*P and KDP crystals mounted in thermostabilised ovens are used for second, third and fourth harmonics generation. Harmonics separators ensure the high spectral purity of each harmonic guided to different output ports. Built-in energy monitors continuously monitor output pulse energy. The data from the energy monitor can be seen on the remote keypad or on a PC monitor. The laser provides triggering pulses for the synchronisation of your equipment. The lead of the triggering pulse can be up to 500 ns and is user-adjustable in ~0.25 ns steps from a personal computer. If required, up to 1000 μs lead of triggering pulse is available by installing a PRETRIG option. Precise pulse energy control, excellent short-term and long-term stability and a 50 Hz repetition rate makes the PL2230 series lasers an excellent choice for many demanding scientific applications.

Simple and convenient laser control

For customer convenience, the laser can be controlled through a user‑friendly remote control pad or USB interface. The remote pad allows easy control of all parameters and features a back‑lit display that is easy to read even with laser safety eye-wear. Alternatively, the laser can be controlled from a personal computer with supplied software for Windows™ operating systems. LabView™ drivers are supplied as well.

Tab 2


Pulse energy3)
  At 1064nm 3mJ 15mJ 35mJ 50mJ 100mJ 140mJ
  At 532nm4) 1.3mJ 7mJ 16mJ 23mJ 45mJ 60mJ
  At 355nm5) 0.9mJ 5mJ 10mJ 14mJ 28mJ 35mJ
  At 266nm6) 0.3mJ 1.5mJ 4mJ 6mJ 11mJ 15mJ
  At 213nm7) 0.2mJ 0.7mJ 1.8mJ 2.5mJ 5mJ 7mJ
Pulse energy stability (Std. Dev.)8)
  At 1064nm <0.2% <0.5%
  At 532nm <0.4% <0.8%
  At 355nm <0.5% <1.1%
  At 266nm <0.5% <1.2%
  At 213nm <1.5% <1.5%
Pulse duration (FWHM)9) 28ps±10% 80ps±10%
Pulse duration stability10) ±1%
Power drift11) ±2%
Repetition rate 0-50Hz 100Hz 50Hz 50Hz 20Hz 20Hz
Polarization vertical, >99% at 1064nm
Pre-pulse contrast >200:1 (peak-to-peak with respect to residual pulses)
Beam profile12) close to Gaussian in near and far fields
Beam divergence13) <1.5mrad <0.7mrad
Beam propagation ratio M2 <1.3 <1.5
Beam pointing stability14) ≤10µrad StdDev ≤30µrad StdDev
Typical beam diameter15) ~2.5mm ~5mm ~6mm ~7mm
Optical pulse jitter
  Internal triggering regime16) <50ps (StdDev) with respect to TRIG1 OUT pulse
  External triggering regime17) ~3ns (StdDev) with respect to SYNC IN pulse
TRIG1 OUT pulse delay18) -500…50ns
Typical warm-up time 5min 30min
Physical characteristics
Laser head size (W x L x H) 456×1031×249 ± 3mm 456×1233×249 ± 3mm 456×1432×249 ± 3mm
Electric cabinet size (W x L x H) 12 V DC power adapter,
85×170×41 ±3 mm
471×391×147 ± 3mm 520×600×331 ± 3mm
Umbilical length 2.5m
Operating requirements
Cooling19) built-in chiller
Room temperature 22 ± 2°C
Relative humidity 20–80% (non-condensing)
Power requirements 110–240V AC, 50/60Hz Single phase, 110–24V AC, 5A, 50/60Hz
Power consumption <0.15kVA <1.0kVA <1.5kVA

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 1064nm.

2) PL2231A-50, PL2231B-20 and PL2231C-20 are preliminary versions, for current specifications please visit EKSPLA.

3) Outputs are not simultaneous.

4) For PL2230 series laser with –SH, -SH/TH, -SH/FH or -SH/TH/FH option or –SH/TH/FH/FiH module.

5) For PL2230 series laser with –TH, -SH/TH or -SH/TH/FH option or –SH/TH/FH/FiH module.

6) For PL2230 series laser with -SH/FH or -SH/TH/FH option or –SH/TH/FH/FiH module.

7) For PL2230 series laser with –SH/TH/FH/FiH module.

8) Averaged from pulses, emitted during 30sec time interval.

9) FWHM. Inquire for optional pulse durations in 20–90ps range. Pulse energy specifications may differ from indicated here.

10) Measured over 1 hour period when ambient temperature variation is less than ±1°C.

11) Measured over 8 hours period after 20 min warm-up when ambient temperature variation is less than ±2°C.

12) Near field Gaussian fit is >80%.

13) Average of X- and Y-plane full angle divergence values measured at the 1/e2 level at 1064nm.

14) Beam pointing stability is evaluated from fluctuations of beam centroid position in the far field.

15) Beam diameter is measured at 1064nm at the 1/e2 level.

16) With respect to TRIG1 OUT pulse. <10ps jitter is provided with PRETRIG option.

17) With respect to SYNC IN pulse.

18) TRIG1 OUT lead or delay can be adjusted with 0.25 ns steps in specified range.

19) Air cooled. Adequate room air conditioning should be provided.



Tab 3

Pretriger for streak camera triggering option (–PRETRIG)

PL2230 series lasers have a built-in low-jitter delay generator for streak camera triggering. It provides a low jitter of < 10 ps StdDev triggering pulse.

Option P20

It provides 20 ps ± 10 % output pulse duration. Pulse energies are ~ 30 % lower in comparison to the 28 ps pulse duration version. See the table below for pulse energy specifications:

1064nm 25mJ 40mJ
532nm 11mJ 16mJ
355nm 7mJ 10mJ
266nm 3mJ 4mJ

Option P80

Provides 80 ps ± 10 % output pulse duration. Pulse energy specifications are same as those of 28 ps lasers.
Tab 4

Tab 4 Inhalt

Tab 5
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 PL2230 series high energy full DPSS mode-locked Nd:YAG lasers
Beschreibung 1
PL2230 series high energy full DPSS mode-locked Nd:YAG lasers 
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 Typical PL2231 series laser output beam profile
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Typical PL2231 series laser output beam profile
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 PL2230 series laser head outline drawing
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PL2230 series laser head outline drawing 
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