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TOPAG Lasertechnik GmbH
Nieder-Ramstädter Str. 247
64285 Darmstadt
Telefon: +49 6151 4259 78
Telefax: +49 6151 4259 88 
E- mail: info [at] topag.de 

PGx11 - Serie, abstimmbar

581
PGx11 - Serie, abstimmbare schmalbandige OPG Systeme

PGX11

Die OPGx11 Serie basiert auf einem synchron gepumpten OPO (SOPO) und einem OPA. Die Laser liefern Pulse mit minimaler, nahezu beugungsbegrenzter Linienbreite (bis <0,5cm-1) und hohen Pulsenergien bei 1 kHz Repetitionsrate. Der Abstimmbereich deckt Wellenlängen vom tiefen UV (193nm) bis ins mittlere Infrarot (16µm) ab. Damit sind diese OPGs eine ausgezeichnete Wahl für viele spektroskopische Anwendungen.

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Tab 1

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 brightness 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.

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 16 000 nm, 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 a specification sheet. Please inquire for custom-built versions.

Tab 2
Specifications 1)

ModelPG411PG411-SHPG411-SH-DUVPG511-DFGPG711PG711-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 µJ3) 50 µJ3) - -
Signal 700µJ 700µJ 500µJ
Idler 4) 250µJ 250µJ 100µJ
DFG - - - - 10µJ 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, nm
SH, DUV - 0.01 nm - - -
Signal 0.02 nm 0.02 nm 0.02 nm
Idler 0.1 nm 0.1 nm 0.1 nm
DFG - - - - - 1 nm
Pulse contrast 8) 500:1 500:1 106:1
Typical beam diameter 9) ~ 4 mm ~ 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 PL2210B-TR
Min. pump energy or power11)
at 1064 nm - 2 mJ (10 mJ) 5W (2,5 mJ)
at 532 nm - 5 mJ -
at 355 nm 5 mJ (8 mJ) - -
Pulse duration 12) 30 ps 30 ps 90 ps
Bream polarization at pump wavelength vertical horizontal horizontal
Beam size 13) 7 mm 7 mm 2.5 mm
Beam divergence < 1 mrad
Beam profile homogeneous, without hot spots
Physical characteristics
Size (WxLxH) 456x1026x273 mm 456x1226x273 mm 456x1026x273 mm 456x1226x273 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 speciications are subject to change without notice. For latest product information please visit EKSPLA. Parameters marked typical are not speciications. They are indications of typical performance and will vary with each unit we manufacture. Unless stated otherwise, all speciications are measured at 450 nm for PG411 units, 800 nm for PG511 units, and 1620 nm for PG711 units.

2) Pulse energies are speciied 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) <2cm-1 in="" signal="" 420="" 709="" nm="" and="" 4cm-1="" idler="" 710="" 2300="" p="">

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 irst 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.

 

 

 

Tab 3

Tab 3 Inhalt

Tab 4

Tab 4 Inhalt

Tab 5
Note: pulse energy can be affected by the air absorption due narrow linewidth of generated radiation.
The curves represents values when air absorption is negligible.
Bild 1
 TOPAG PGx11 g
Beschreibung 1
Typical outside view of PGX11 series picosecond optical parametric generators 
Bild 2
 TOPAG PGx11 a
Beschreibung 2
Typical PG411-SH model tuning curve. 
Bild 3
 TOPAG PGx11 b
Beschreibung 3
Typical PG411-DUV model tuning curve.
Bild 4
 TOPAG PGx11 c
Beschreibung 4
Typical PG511-DFG model tuning curve. 
Bild 5
 TOPAG PGx11 d
Beschreibung 5
Typical PG711-DFG model tuning curve. Pump energy: 2.5mJ at 1064 nm., 1 kHz repetition rate. 
Bild 6
 TOPAG PGx11 e
Beschreibung 6
PG511-DFG model typical output linewidth 
Bild 7
 TOPAG PGx11 f
Beschreibung 7
PGX11 series optical parametric generator outline drawings 
Bild 8
 
Beschreibung 8
 
Bild 9
 
Beschreibung 9
 
Bild 10
 
Beschreibung 10