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PGX11 series Picosecond Narrow Linewidth OPG

PGx11 series optical parametric generators offer broad output wavelength tuning – from 210 nm to 16 000 nm with nearly Fourier-transform limited linewidth (2 cm⁻¹ and 0.5 cm⁻¹) and low divergence.

Features

  • High brightness picosecond pulses at up to 1 kHz pulse repetition rate
  • Nearly Fourier-transform limited linewidth
  • Low divergence <2 mrad
  • Hands-free wavelength tuning
  • Tuning range from 193 nm to 16000 nm
  • Remote control via keypad
  • PC control using USB (RS232 is optional) and LabVIEW™ drivers

Applications

  • Time resolved pump-probe spectroscopy
  • Laser-induced fluorescence
  • Infrared spectroscopy
  • Nonlinear spectroscopy: vibrational-SFG, surface-SH, CARS, Z-scan
  • Other laser spectroscopy applications

 

PGx11 series optical parametric devices employ advanced design concepts in order to produce broadly tunable picosecond pulses with nearly Fourier-transform limited linewidth and low divergence. High rightness output beam makes the PGx11 series units an excellent choice for advanced spectroscopy applications.
Optical layout of PGx11 units consists of Synchronously pumped Optical Parametric Oscillator (SOPO) and Optical Parametric Amplifier (OPA). SOPO is pumped by a train of pulses at approx. 87 MHz pulse repetition rate. The output from SOPO consists of a train of pulses with excellent spatial and spectral characteristics, determined by the SOPO cavity parameters.
OPA is pumped by a single pulse temporally overlapped with SOPO output. After amplification at SOPO resonating wavelength, the PGx11 output represents a high intensity single pulse on top of a low-intensity train, while in all other spectral ranges (idler for PG411 and PG711, signal for PG511, also DFG stages) only a single high intensity pulse is present.

Three models designed for pumping by up to the 3rd harmonic of Nd:YAG laser are available.

Model        Features
PG411 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) and Sum Frequency Generator (-DUV), it offers the widest possible tuning range – from 193 to 2300 nm.
PG511 Model has a tuning range from 725 to 2000 nm and highest pulse energy in near-IR spectral range. With an optional Difference Frequency Generator (DFG) the tuning range can be extended into the 2300 – 10000 nm range. PG411 and PG511 models are designed to be pumped by PL2250 series lasers with a 10 Hz pulse repetition rate.
PG711 Model has 1 kHz pulse repetition rate and uses DPSS mode‑locked laser of the PL2210 series for pumping. When pumped with pulses of 90 ps duration, linewidths of less than 1 cm⁻¹ were measured in the spectral range up to 16 µm, which makes this device an excellent choice for time-resolved or nonlinear infrared spectroscopy.

Microprocessor based control system provides automatic positioning of relevant components, allowing hands free operation. Nonlinear crystals, diffraction grating and filters are rotated by ultra-precise stepper motors in microstepping mode, with excellent reproducibility. Precise nonlinear crystal temperature stabilization ensures long-term stability of generated wavelength and output power. For customer convenience the system can be controlled using a user-friendly remote control pad or through USB interface (RS232 is optional) from a personal computer (PC) using supplied LabView™ drivers. Available standard models are summarized in „Specifications“ table. Please inquire for custom-built versions.

Specifications 1)

Model PG411   PG411‑SH   PG411‑SH‑DUV PG511-DFG PG711 PG711-DFG
OPG SPECIFICATIONS
Output wavelength tuning range
  SH, DUV 210-420 nm 193-420 nm
  Signal 420-709 nm 725-1000 nm 1550-2020 nm
  Idler 710-2300 nm 1140-2000 nm 2250-3350 nm
  DFG 2300-10000 nm 3350‑16000 nm
Output pulse energy 2)
  SH, DUV 100 µJ 3) 50 µJ 3)
  Signal 700µJ 500 µJ
  Idler 4) 250µJ 100 µJ
  DFG 10 µJ 5)
Pulse repetition rate 10 Hz 10 Hz 1000 Hz
Linewidth < 2 cm-1 6) <2 cm-1 < 0.5 cm-1
Typical pulse duration 7) 15 ps 20 ps 70 ps
Scanning step
  SH, DUV 0.01 nm
  Signal 0.02 nm
  Idler 0.1 nm
  DFG 1 nm
Pulse contrast 8) 500 : 1 106 : 1
Typical beam diameter 9) ~ 4 mm ~ 3 mm
Beam divergence 10) < 2 mrad
Beam polarization 10)
  SH, DUV vertical
  Signal horizontal vertical horizontal
  Idler vertical horizontal vertical
  DFG horizontal horizontal
PUMP LASER REQUIREMENTS
Recommended pump source PL2251A + APL + H411 PL2251A + APL + H511 PL2210B-TR
Min. pump energy or power 11)
  at 1064 nm 2 mJ (10 mJ) 5W (2.5 mJ)
  at 532 nm 5 mJ (8 mJ)
  at 355 nm 5 mJ (8 mJ)
Pulse duration 12) 30 ps 90 ps
Bream polarization at pump wavelength vertical horizontal
Beam size 13) 7 mm 2.5 mm
Beam divergence < 1 mrad
Beam profile homogeneous, without hot spots
PHYSICAL CHARACTERISTICS
Size (W x L x H) 456 x 1026 x
273 mm
456 x 1226 x 273 mm 456 x 1026 x
273 mm
456 x 1226 x
273 mm
OPERATING REQUIREMENTS
Room temperature 15-30 °C
Room temperature stability ± 2 °C
Mains voltage 90-240 V single phase, 47-63 Hz
Power consumption < 300 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 PG411 units, 800 nm for PG511 units, and 1620 nm for PG711 units.
2) Pulse energies are specified at selected wavelengths. See typical tuning curves for pulse energies at other wavelengths.
3) Measured at 280 nm for SH and 200 nm for DUV.
4) Measured at 1000 nm for PG411 units, 1620 nm for PG511, and 3000 nm for PG711 units.
5) Measured at 10000 nm.
6) <2 cm-1 in signal (420-709 nm) and  <4 cm-1 in idler (710-2300 nm).
7) Estimated FWHM assuming pump pulse duration 30 ps at 1064 nm for PG411 and PG511 units, and 90 ps at 1064 nm for PG711 units.
8) Ratio of intensity of single pulse with respect to residual pulse train. In SH or DFG ranges pulse contrast is better than 10⁶ : 1.
9) Beam diameter is measured at 1/e² level and can vary depending on the pump pulse energy.
10) Full angle measured at FWHM level.
11) The first number represents pulse train energy or power, while the value in brackets represents single pulse energy.
12) At FWHM level. Inquire for other available pulse duration options.
13) Beam diameter measured at 1/e² level.

 

Ordering information

Ordering information of PGX11 series picosecond narrow linewidth OPG

 

Note: The energy tuning curves are affected by air absorption due narrow linewidth. These pictures present pulse energies where air absorption is negligible.