Available Equipment (ELI-ERIC)

Available Equipment (ELI-ERIC)

SYLOS 2 laser system

SYLOS 2: The laser provides more than 2.75 TW peak power pulses with less than 8 fs duration at 1 kHz repetition rate. The laser system is based on a sequence of noncollinear optical parametric chirped pulse amplifier (NOPCPA) stages consisting of BBO crystals, which are driven by diode-pumped Nd:YAG lasers.

Contact person

János Csontos
(janos.csontos[@]eli-alps.hu)

 

The SYLOS 2 laser system has 5 target areas, including 2 GHHG, electron acceleration, SHHG and a user setup for neutron generation.

Brief description of the available set up

 

The SYLOS 2 laser provides more than 2.75 TW peak power pulses with less than 8 fs duration at 1 kHz repetition rate. The laser system is based on a sequence of noncollinear optical parametric chirped pulse amplifier (NOPCPA) stages consisting of BBO crystals (produced by Light Conversion Ltd.), which are driven by diode-pumped Nd:YAG lasers (produced by EKSPLA Ltd).

Description of key areas of science

 

The laser system driving two attosecond sources at the Sylos Compact and the Sylos Long beamlines as well as various particle sources, like the Low-Energy Ion Acceleration experiment for neutron generation and a shortly commissioned laser driven wakefield electron acceleration (eSylos) and surface high harmonic beamlines (SHHG). The laser also drives a chemical reaction control setup with an attenuated beam (GPRC).

Full description of system

 

Figure 1 shows the schematic layout, while more details can be found in [1, 2].

Figure 1: Schematic layout of SYLOS 2

The most important output parameters are shown in Table 1. The energy can be varied from 15 mJ up to the maximum energy while other output parameters are kept constant. The energy can be reduced below 15 mJ as well, but all other laser parameters are not guaranteed. CEP setpoint can be adjusted continuously between 0 and 2π. The pulse duration can be stretched up to 200 fs with additional negative chirp or alternatively with limiting the spectrum at the expense of pulse energy.

 

 Table 1: Measured parameters at the output of the SYLOS2 main laser beam.

 The beam profile can be either Gaussian (Option 1) or super-Gaussian (Option 2) (Figure 2.). The corresponding beam diameters are shown in Fig. 2. and in Table 1.  For internal experiments within the laser laboratory, we can provide a leakage beam simultaneously with the main beam as well. The parameters of this beam listed in Table 2.

 

Table 2: Measured parameters at the output of the SYLOS2 laser 1mJ beamline.

 

The typical output spectrum ranges from 720 nm to 1180 nm and it is plotted in Figure 3.

Figure 2: Output beam profile and beam size without (a) and with (b) spatial filtering.

Figure 3: Typical spectrum at the output.

Available metrology

Pulse duration:

  • Light Conversion own product delivered with the laser system

  • Sphere Photonics D-cycle NIR

    • Wavelength range: 700-1400 nm

    • PD (FTL): 2.5-60 fs

    • GDD range: +/-600fs^2

Beam profiler:

  • Light Conversion own product delivered with the laser system

  • Cinogy CinCam CMOS Nano 1.001

    • Active area (without cover glass): 11.3mm x 11.3mm

    • Number of pixel: 2048 x 2048 (4.2MPixel)

    • Pixel size: 5.5µm x 5.5µm

Energy meter:

  • Light Conversion own product delivered with the laser system

  • MAESTRO Digital controller + UP55M-500W-H12-D0 Thermopile detector

    • Aperture: 50-55 mm diameter

    • Cooling: Watercooled (up to 700W)

    • Max. avg power: 500W (continues)

    • Noise equivalent power: 15 mW

    • Spectral range: 0.193 - 20 um

  • MAESTRO Digital controller + QE8SP-B-BL-D0 Pyroelectric detector

    • Aperture: 7.8*7.8 mm

    • Spectral range: 0.193 - 20 um

    • Max. measurable enrgy: 2.5 mJ

    • Noise equivalent energy: 150 nJ

Temporal contrast:

  • Ultrafast Innovations Tundra High Dynamic Range Autocorrelator

    • Single Dynamic Range: 11@800nm

    • Delay Scan range: 633ps

    • Scan step resolution: 2 fs

    • Pulse energy: 50-150uJ

CEP measurement:

  • Light Conversion own product delivered with the laser system (f-2f interferometer)

Spectrum:

  • Avantes Compactline Avaspec-Mini3648-LIC1

    • Wavelength range: 600nm to 1100nm

    • Spectra resolution: 0.14 nm

  • Broadcom Qred NIR:

    • Wavelengths range: 900-1700 nm

    • Spectral resolution: 4 nm


References

[1] R. Budriūnas et al, Opt. Express 25 (2017).

[2] S Toth et al , J. Phys. Photonics 2 (2020).

 

 

February

25

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