Ekspla PGX01 series: High energy, narrow linewidth picosecond optical parametric generators (OPGs)

Ekspla PGX01

Ekspla PGX01 series picosecond optical parametric generators (OPGs) feature high pulse energy and narrow linewidth. PGX01 series OPGs are an excellent choice for researchers who need picosecond tunable source from UV to mid IR. Due to the unique tunability range these devices are a very attractive and cost-efficient alternative to other tunable laser radiation sources.  

 

 

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
  • Motorized hands-free tuning in 193 – 2300 nm or 420 – 10000 nm range
  • Remote control via keypad
  • PC control via USB port (RS232 is optional) and LabVIEW™ drivers

Applications

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

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

PG401 model has a tuning range from 420 to 2300 nm and is optimized for providing highest pulse energy in the visible part of the spectrum. When combined with an optional second harmonic generator (SHG), Sum Frequency Generator (DUV) or Difference Frequency Generator (DFG) stages, it offers the widest possible tuning range – from 193 to 16000 nm. The wide tuning range makes PG401 units suitable for many spectroscopy application.

PG501 model has a tuning range from 680 to 2300 nm and highest pulse energy in the near-IR spectral range. Optional DFG stages are available for extension of tuning range to the 2300 – 16000 nm region. The PG501-DFG1P model is the optimal choice for vibra tional-SFG spectroscopy setups.

PG701 model has a tuning range from 1395 to 4500 nm and is targeted for vibrational-SFG or infrared spectroscopy applications.

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 superfluorescence (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 a user-friendly remote control pad. Both options allow easy control of system settings.

Download datasheet here.

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