APL HP series

High Repetition Rate Diode Pumped Picosecond Amplifiers
  • Pulse energies up to 150 mJ
  • 20 – 300 ps pulse duration
  • Up to 2 kHz pulse repetition rate
  • Diode pumped solid state design picosecond amplifiers
  • Pulse energies up to 150 mJ
  • 20 – 300 ps pulse duration
  • Up to 2 kHz pulse repetition rate
  • Diode pumped solid state design picosecond amplifiers

Features & Applications


  • Diode pumped picosecond amplifiers
  • Pulse energies up to 150 mJ
  • 20 – 300 ps pulse duration
  • High pulse energy up to 2 kHz pulse repetition rate
  • Diode pumped solid state design
  • Advanced beam shaping for high pulse energy
  • Internal or external seeding source
  • Thermally induced birefringence compensated
  • Low maintenance costs
  • 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 repetition rate APL series amplifiers are designed to produce up to 150 mJ picosecond pulses at 1 kHz repetition rate (or 500 mJ at 100 Hz repetition rate). 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 LBO and/or BBO crystals 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
    Fundamental500 mJ30 mJ60 mJ130 mJ
    SH output 2) 3)300 mJ20 mJ40 mJ85 mJ
    TH output 2)200 mJ10 mJ20 mJ50 mJ
    FH output 2)50 mJ3 mJ6 mJ15 mJ
Pulse repetition rate100 Hz1 kHz
Pulse duration 4)90 ± 10 ps
Pulse energy stability 5)
    Fundamental≤ 0.5 %
    SH output 2)≤ 0.8 %
    TH output 2)≤ 2 %
    FH output 2)≤ 3 %
Long-term power drift 6)± 1.5 %
Beam spatial profileSuper-Gaussian 7)
Beam diameter 8)~ 12 mm~ 5 mm~ 7 mm
Beam pointing stability 9)≤ 20 µrad
Beam divergence≤ 0.5 mrad≤ 0.6 mrad≤ 0.5 mrad
Pre-pulse contrast 10)> 200:1
Optical pulse jitter 11)
    Trig out≤ 100 ps
    Pre-Trig out≤ 50 ps
    With –PLL option≤ 2 ps
Laser head size (W×L×H mm)1200 × 2400 × 300600 × 1500 × 300900 × 1500 × 300900 × 1800 × 300
Power supply size (W×L×H mm)553 × 600 × 832
377 × 1015 × 1080
553 × 600 × 830553 × 600 × 1230
Umbilical length 13)2.5 m
Electrical power208, 380 or 400 V AC, three-phase, 50/60 Hz 15)
Power consumption 16)≤ 5 kW≤ 5 kW≤ 10 kW≤ 22 kW
Water supply≤ 8 l/min, 2 Bar, max 20 °C≤ 14 l/min, 2 Bar, max 20 °C≤ 25 l/min, 2 Bar, max 20 °C≤ 40 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. Harmonic outputs are optional. Specifications valid with respective harmonic module purchased. Outputs are not simultaneous.
  3. Second harmonic specification is valid when only SH option is ordered. If TH/FH options are orders second harmonic efficiency is reduced to ~50 %.
  4. 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.
  5. Under stable environmental conditions, normalized to average pulse energy (RMS, averaged from 60 s).
  6. Measured over 8 hours period after 30 min warm-up when ambient temperature variation is less than ±2 °C.
  7. Super-Gaussian spatial mode of 6-11th order in near field.
  8. Beam diameter is measured at signal output at 1/e2 level for Gaussian beams and FWHM level for Super-Gaussian beams.
  9. Beam pointing stability is evaluated as movement of the beam centroid in the focal plane of a focusing element (RMS, averaged from 60 s).
  10. 1000:1 contrast available upon request.
  11. 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
  12. System sizes are preliminary and depend on customer lab layout and additional options purchased.
  13. Longer umbilical with up to 5 m available upon request.
  14. 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.
  15. Voltage fluctuations allowed are +10 % / -15 % from nominal value.
  16. 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
-50/10050 Hz or 100 Hz pulse repetition rateEnergy can be increased ~4 times
-2k2 kHz pulse repetition rateReduces the output energy of fundamental by ~50 %
-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 :
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Application selected :
All Applications
Scientific Applications
High Intensity Sources – laser produced plasma, x-ray source, extreme UV
OPCPA Systems – optical parametric chirped pulse amplification system
All Applications

53 W average power CEP-stabilized OPCPA system delivering 5.5 TW few cycle pulses at 1 kHz repetition rate

Related applications:  High Intensity Sources OPCPA Systems

Authors:  R. Budriūnas, T. Stanislauskas, J. Adamonis, A. Aleknavičius, G. Veitas, D. Gadonas, S. Balickas, A. Michailovas, A. Varanavičius

We present a high peak and average power optical parametric chirped pulse amplification system driven by diode-pumped Yb:KGW and Nd:YAG lasers running at 1 kHz repetition rate. The advanced architecture of the system allows us to achieve >53 W average power combined with 5.5 TW peak power, along with sub-220 mrad CEP stability and sub-9 fs pulse duration at a center wavelength around 880 nm. Broadband, background-free, passively CEP stabilized seed pulses are produced in a series of cascaded optical parametric amplifiers pumped by the Yb:KGW laser, while a diode-pumped Nd:YAG laser system provides multi-mJ pump pulses for power amplification stages. Excellent stability of output parameters over 16 hours of continuous operation is demonstrated.

Published: 2017.   Source: Optical Society of America | Vol. 25, No. 5 | 6 Mar 2017 | OPTICS EXPRESS 5799

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