PGx01 series

High Energy Broadly Tunable Picosecond OPA
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  • High energy picosecond OPA
  • Ultra-broad tuning from 193 to 16 000 nm
  • Up to 1 mJ in VIS
  • 50 Hz repetition rate
  • High energy picosecond OPA
  • Ultra-broad tuning from 193 to 16 000 nm
  • Up to 1 mJ in VIS
  • 50 Hz repetition rate

Features & Applications

Features

  • Ultra-wide spectral range from 193 to 16000 nm
  • High peak power (>50 MW) ideal for non-linear spectroscopy applications
  • Narrow linewidth <6 cm⁻¹ (for UV < 9 cm-1)
  • Motorized hands-free tuning in 193 – 2 300 nm or 2 300 – 16 000 nm range
  • PC control via USB port (RS232 is optional) and LabVIEW™ drivers
  • Remote control via keypad

Applications

  • Nonlinear spectroscopy: vibrational-SFG, surface-SH, CARS, Z-scan
  • Pump-probe experiments
  • Laser-induced fluorescence (LIF)
  • Other laser spectroscopy applications

Description

Travelling Wave Optical Parametric Generators (TWOPG) are an excellent choice for researchers who need an ultra‑fast tunable coherent light source from UV to mid IR.

Design

The units can be divided into several functional modules:

  • optical parametric generator (OPG);
  • diffraction grating based linewidth narrowing system (LNS);
  • optical parametric amplifier (OPA);
  • electronic control unit.

The purpose of the OPG module is to generate parametric superfluores-cence (PS). Spectral properties of the PS are determined by the properties of a nonlinear crystal and usually vary with the generated wavelength.

In order to produce narrowband radiation, the output from OPG is narrowed by LNS down to 6 cm⁻¹ and then used to seed OPA.

Output wavelength tuning is achieved by changing the angle  of the nonlinear crystal(s) and grating. To ensure exceptional wavelength reproducibility, computerized control unit driven precise stepper motors rotate the nonlinear crystals and diffraction grating. Nonlinear crystal temperature stabilization ensures long‑term stability of the output radiation wavelength.

In order to protect nonlinear crystals from damage, the pump pulse energy is monitored by built-in photodetectors, and the control unit produces an alert signal when pump pulse energy exceeds the preset value.

For customer convenience the system can be controlled through its USB type PC interface (RS232 is optional) with LabView™ drivers or remote control pad. Both options allow easy control of system settings.

Available Models

Ekspla offers four models designed for pumping by up to the 4th harmonic of Nd:YAG laser.

ModelFeatures
PG401Model has a tuning range from 420 to 2300 nm and is optimized for providing highest pulse energy in the visible part of the spectrum. The wide tuning range makes PG401 units suitable for many spectroscopy application.
PG501-DFGModel has a tuning range from 2300 to 16000 nm. The PG501-DFG1 model is the optimal choice for vibrational-SFG spectroscopy setups.

Specifications

Model PG401 PG401-SHPG401-DUV PG501-DFG1PG501-DFG2
OPA 1)
Tuning range
    DUV193 – 209.95 nm
    SH210 – 340, 370 – 419 nm
    Signal 420 – 680 nm
    Idler 740 – 2300 nm
    DFG2300 – 10000 nm2300 – 16000 nm
Output pulse energy 2)> 1000 µJ at 450 nm> 100 µJ> 50 µJ at 200 nm> 250 µJ at 3700 nm
> 50 µJ at 10000 nm
> 250 µJ at 3700 nm
> 90 µJ at 10000 nm
Linewidth< 6 cm-1< 9 cm-1< 6 cm-1
Max pulse repetition rate 50 Hz
Scanning step
    Signal 0.1 nm
    Idler 1 nm
Typical beam size 3) ~4 mm ~3 mm ~9 mm
Beam divergence 4)< 2 mrad < 3 mrad
Beam polarizationhorizontal vertical horizontal
    Signal horizontal
    Idler horizontal
Typical pulse duration~15 ps~12 ps~20 ps
PUMP LASER REQUIREMENTS
Pump energy
   at 355 nm10 mJ
   at 532 nm10 mJ
   at 1064 nm2 mJ6 mJ15 mJ
Recommended pump source 5)PL2231-50-TH,
PL2251A-TH
PL2231-50-SHPL2231A-50-SH
Recommended harmonic
generator module
SFGH500
Beam divergence< 0.5 mrad
Beam profilehomogeneous, without hot spots, Gaussian fit >90 %
Pulse duration 6)30 ± 5 ps
PHYSICAL CHARACTERISTICS
Size (W x L x H) 456 × 633 × 244 mm 456 × 1031 × 249 ± 3 mm
OPERATING REQUIREMENTS
Room temperature 15 – 30 °C
Power requirements 100 – 240 V AC single phase, 47 – 63 Hz
Power consumption< 100 W
  1. Due to continuous improvement, all specifications are subject to change without notice. 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 450 nm for PG401 units, 3000 nm for PG501 units and 300 nm for PG401SH units and for basic system without options.
  2. See tuning curves for typical pulse energies at other wavelengths. Higher energies are available, please contact Ekspla for more details.
  3. Beam diameter is measured at the 1/e² level.
  4. Full angle measured at the FWHM point.
  5. If a pump laser other than PL2250 or PL2230 is used, measured beam profile data should be presented when ordering.
  6. Should be specified if non-EKSPLA pump laser is used.

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.

Customized for Specific Requirements

Please note that these products are custom solutions tailored for specific applications or specific requirements.

PG401-DFG1 provides:

  • The broadest hands-free tuning range – from 420 to 10000 nm
  • It can be further extended up to 16000 nm with -DFG2 option. It should be noted, that for the 8000 – 16000 nm range a different nonlinear crystal is used, and exchange of the crystals needs to be done manually

PG402 features:

  • Gap-free tuning range 410 – 709, 710 – 2300 nm
  • Linewidth < 18 cm-1

Tuning Curves

Optical Layouts & Drawings

Ordering Information

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