APL HE series

High Energy Flash Lamp Pumped Picosecond Amplifiers
  • Pulse energies up to 2.2 J
  • 20 – 300 ps pulse duration
  • 10 Hz pulse repetition rate
  • Flash lamp pumped picosecond amplifiers
  • Diode pumped regenerative amplifier
  • Pulse energies up to 2.2 J
  • 20 – 300 ps pulse duration
  • 10 Hz pulse repetition rate
  • Flash lamp pumped picosecond amplifiers
  • Diode pumped regenerative amplifier

Features & Applications


  • Flash lamp pumped picosecond amplifiers
  • Pulse energies up to 2.2 J
  • 20 – 300 ps pulse duration
  • 10 Hz pulse repetition rate
  • Diode pumped regenerative amplifier
  • Internal or external seeding source
  • Advanced beam shaping for high pulse energy
  • Thermally induced birefringence compensated design
  • Less than 10 ps RMS jitter synchronization pulses for streak camera triggering
  • Control through USB and LAN interfaces with supplied Windows control software (RS232 optional)
  • Vacuum image relay system
  • Optional temperature stabilized second, third and fourth harmonic generators
  • Optional extremely precise synchronization to external RF signal with PLL option
  • Optional Gaussian like spatial beam profile with Gaussian fit > 85% in near field
  • Optional reduced pulse duration to 20 ps


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


High energy APL series amplifiers are designed to produce high energy picosecond pulses at 1064 nm. High pulse energy, excellent pulse-to-pulse energy stability, superior beam quality makes these amplifiers well suited for applications like OPCPA pumping, non-linear optics and others.

Regenerative amplifier / Power amplifier design

APL series amplifiers are designed to be seeded by external seeding source. Diode pumped regenerative amplifier ensures amplification of seed signal to stable mJ level pulse for amplification in linear amplifiers. Advanced beam shaping ensures smooth, without hot spots beam spatial profile at the laser output. Low light depolarization level allows high efficiency generation of up to 4th harmonic with optional build-in harmonic generators. Alternatively Ekspla can offer an internal seeder meeting customer’s requirements.

Build-in harmonic generators

Angle-tuned non-linear crystals harmonic generators mounted in temperature stabilized heaters are used for second, third and fourth harmonic generation. Harmonic separation system is designed to ensure high spectral purity of radiation and direct it to the output ports.

Simple and convenient laser control

For customer convenience the amplifier can be controlled through USB and LAN interfaces (RS232 as optional). The amplifier can be controlled from personal computer with supplied software for Windows operating system.


Output energy
    Fundamental300 mJ600 mJ1000 mJ2200 mJ 2) 3)
    SH output 4) 5)200 mJ400 mJ650 mJ1400 mJ
    TH output 4)90 mJ180 mJ300 mJ660 mJ
    FH output 4)30 mJ60 mJ100 mJ220 mJ
Pulse repetition rate10 Hz
Pulse duration 6)90 ± 10 ps
Pulse energy stability 7)
    Fundamental≤ 0.6 %
    SH output 4)≤ 0.8 %
    TH output 4)≤ 2 %
    FH output 4)≤ 3 %
Long-term power drift 8)± 2 %
Beam spatial profileSuper-Gaussian 9)
Beam diameter 10)9 mm~11 mm~17 mm~23 mm
Beam pointing stability 11)≤ 30 µrad
Beam divergence≤ 0.5 mrad
Pre-pulse contrast 12)> 200:1
Optical pulse jitter 13)
    Trig out≤ 100 ps
    Pre-Trig out≤ 50 ps
    With –PLL option≤ 2 ps
Laser head size (W×L×H mm)600 × 1200 × 300600 × 1500 × 300600 × 1800 × 300900 × 1800 × 300
Power supply size (W×L×H mm)553 × 600 × 650553 × 600 × 830553 × 600 × 1230
Umbilical length 15)2.5 m
Electrical power200 – 240 V AC, single-phase, 47 – 63 Hz208, 380 or 400 V AC, three-phase, 50/60 Hz 17)
Power consumption 18)≤ 2 kVA≤ 2.5 kVA≤ 4.5 kVA≤ 7 kVA
Water supply≤ 3 l/min, 2 Bar, max 20 °C≤ 6 l/min, 2 Bar, max 20 °C≤ 12 l/min, 2 Bar, max 20 °C≤ 14 l/min, 2 Bar, max 20 °C
Operating ambient temperature22 ± 2 °C
Storage ambient temperature15 – 35 °C
Relative humidity (non-condensing)≤ 80 %
Cleanness of the roomISO Class 7
  1. Due to continuous improvement, all specifications are subject to change without notice. The parameters marked ‘typical’ are indications of typical performance and will vary with each unit we manufacture. Presented parameters can be customized to meet customer‘s requirements. All parameters measured at 1064 nm if not stated otherwise.
  2. 2 200 mJ energy is achieved with Super-Gaussian spatial beam profile of 11th or higher order (with steep edges). If lower order Super-Gaussian is required maximum pulse energy will be limited to 2 000 mJ.
  3. 2 500 mJ output energy is available upon request with longer pulse duration.
  4. Harmonic outputs are optional. Specifications valid with respective harmonic module purchased. Outputs are not simultaneous.
  5. Second harmonic specification is valid when only SH option is ordered. If TH/FH options are orders second harmonic efficiency is reduced to ~50 %.
  6. Standard pulse duration is 90 ps. Other pulse durations can be ordered within range of 20 ps – 300 ps. Shortening the pulse duration below 90 ps will reduce the output energy proportionally.
  7. Under stable environmental conditions, normalized to average pulse energy (RMS, averaged from 60 s).
  8. Measured over 8 hours period after 30 min warm-up when ambient temperature variation is less than ±2 °C.
  9. Super-Gaussian spatial mode of 6-11th order in near field.
  10. Beam diameter is measured at signal output at 1/e2 level for Gaussian beams and FWHM level for Super-Gaussian beams.
  11. Beam pointing stability is evaluated as movement of the beam centroid in the focal plane of a focusing element (RMS, averaged from 60 s).
  12. 1000:1 contrast available upon request.
  13. Optical pulse jitter with respect to electrical outputs:
    – Trig out > 3.5 V @ 50 Ω
    – Pre-Trig out > 1 V @ 50 Ω
    – PLL option > 1 V @ 50 Ω
  14. System sizes are preliminary and depend on customer lab layout and additional options purchased.
  15. Longer umbilical with up to 10 m available upon request.
  16. 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.
  17. Voltage fluctuations allowed are +10 % / -15 % from nominal value.
  18. Required current rating can be calculated by dividing power rating by mains voltage. Power rating is given in apparent power (kVA) for systems with flash lamp power supplies and in real power (kW) for systems without flash lamp power supplies where reactive power is neglectable.

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.


-P20…300Custom pulse duration between 20 ps and 300 psAvailable with internal and external seeder. Shortening the pulse duration below 90 ps will reduce the output energy proportionally
-GGaussian like spatial beam profileReduces the output energy of fundamental by ~80 %
-FSExternal seeder input via motorized spectral broadening stageRequires > 1.5 nJ per pulse @ 800 nm, ≤ 100 fs
-PLLPhase Lock Loop option for precise lock to external RF signalElectrical to optical signal jitter ≤ 3 ps
-SH/TH/FHsecond, third and fourth harmonic outputsConversion efficiency from fundamental respectively ~50 %, ~30 % and ~10 %. Harmonic outputs not simultaneous with fundamental output
-AWWater-to-Air coolingReplaces or supplements Water-to-Water cooling unit. Heat dissipation equals total power consumption


Drawings & Images

Power Supply

CabinetUsable heightHeight H, mmWidth W, mmDepth D, mm
MR-99 U455.5 (519 1) )553600
MR-1212 U589 (653 1) )553600
MR-1616 U768 (832 1) )553600
MR-2020 U889 (952 1) )553600
MR-2525 U1167 (1231 1) )553600
  1. Full height with wheels.


Found total :
3 articles, 3 selected
Application selected :
All Applications
Laser Spectroscopy
Fluorescence Spectroscopy
Time-resolved Spectroscopy
Scientific Applications
OPCPA Systems – optical parametric chirped pulse amplification system
High Intensity Sources – laser produced plasma, x-ray source, extreme UV
Plasma Physics
All Applications

Quantitative picosecond laser-induced fluorescence measurements of nitric oxide in flames

Related applications:  Fluorescence Spectroscopy Laser Spectroscopy Time-resolved Spectroscopy

Authors:  Christian Brackmann, Joakim Bood, Jenny D. Nauclér, Alexander A. Konnov, Marcus Aldén

Quantitative concentrations measurements using time-resolved laser-induced fluorescence have been demonstrated for nitric oxide (NO) in flame. Fluorescence lifetimes measured using a picosecond Nd:YAG laser and optical parametric amplifier system have been used to directly compensate the measured signal for collisional quenching and evaluate NO concentration. The full evaluation also includes the spectral overlap between the ∼15 cm−1 broad laser pulse and multiple NO absorption lines as well as the populations of the probed energy levels. Effective fluorescence lifetimes of 1.2 and 1.5 ns were measured in prepared NO/N2/O2 mixtures at ambient pressure and temperature and in a premixed NH3-seeded CH4/N2/O2 flame, respectively. Concentrations evaluated from measurements in NO/N2/O2 mixtures with NO concentrations of 100–600 ppm were in agreement with set values within 3% at higher concentrations. An accuracy of 13% was estimated by analysis of experimental uncertainties. An NO profile measured in the flame showed concentrations of ∼1000 ppm in the post-flame region and is in good agreement with NO concentrations predicted by a chemical mechanism for NH3 combustion. An accuracy of 16% was estimated for the flame measurements. The direct concentration evaluation from time-resolved fluorescence allows for quantitative measurements in flames where the composition of major species and their collisional quenching on the probed species is unknown. In particular, this is valid for non-stationary turbulent combustion and implementation of the presented approach for measurements under such conditions is discussed.

Published: 2016.   Source: Proceedings of the Combustion Institute, vol. 36:3, pp. 4533-4540 (2017)

Table top TW-class OPCPA system driven by tandem femtosecond Yb:KGW and picosecond Nd:YAG lasers

Related applications:  OPCPA Systems

Authors:  T. Stanislauskas, R. Budriūnas, R. Antipenkov, A. Zaukevičius, J. Adamonis, A. Michailovas, L. Giniūnas, R. Danielius, A. Piskarskas, A. Varanavičius

We present a compact TW-class OPCPA system operating at 800 nm. Broadband seed pulses are generated and pre-amplified to 25 mJ in a white light continuum seeded femtosecond NOPA. Amplification of the seed pulses to 35 mJ at a repetition rate of 10 Hz and compression to 9 fs is demonstrated.

Published: 2014.   Source: Optical Society of America | Vol. 22, No. 1 | DOI:10.1364/OE.22.001865 | OPTICS EXPRESS 1865

Emission properties of ns and ps laser-induced soft x-ray sources using pulsed gas jets

Related applications:  High Intensity Sources Plasma Physics

Authors:  M. Müller, F.-Ch. Kühl, P. Großmann, P. Vrba, K. Mann

The influcence of the pulse duration on the emission characteristics of nearly debris-free laser-induced plasmas in the soft x-ray region (λ ≈1-5 nm) was investigated, using six different target gases from a pulsed jet. Compared to ns pulses of the same energy, a ps laser generates a smaller, more strongly ionized plasma, being about 10 times brighter than the ns laser plasma. Moreover, the spectra are considerably shifted towards shorter wavelengths. Electron temperatures and densities of the plasma are obtained by comparing the spectra with model calculations using a magneto-hydrodynamic code.

Published: 2013.   Source: Opt. Express 21, 12831-12842 (2013)

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