Synchronously Pumped Picosecond Optical Parametric Oscillator Tunable from 1.2 to 22 Ám a
featuring: 1.8 cm-1 linewidth and 11 ps pulse duration
above 20 mW at 5 Ám b
Fig. 1. Upper right: S Scheme of the SP-OPO built around LiNbO3, KTP, AgGaSe2 and CdSe crystal. Upper center: comparison of the atmospheric absorption spectra measured by scanning by scanning the OPO beam frequency by 0.1 cm-1 steps or using a FFT infrared spectrometer with resolution set to 1 cm-1 and 2 cm-1 respectively. Upper left: Autocorrelation profile of the infrared pulses (7 Ám). Lower right: typical power ouptut in the far IR. Lower center: laser linewidths as measured by a 1 cm-1 resolution dispersive monochromator. Lower right: conversion efficiency of the AgGaS2OPO.
The scheme of a synchronously pumped picosecond Optical Parametric Oscillator (OPO) requires only one pump beam at fixed frequency to produce the desired tunable infrared from 1.2 to 10 Ám. In comparison with conventional Optical Parametric Generator/Amplifier configurations, the reduced number of conversion steps allows higher overall conversion efficiency to be achieved while the limited number of optical components means increased reliability and cost-effectiveness.
- Excellent TEM 00 mode quality and pointing stability are guaranteed by more than one meter long OPO cavity and stringent mode selection by small diameter gain-guided-amplifying medium in the non-linear crystal. Wavefront quality is preserved by avoiding the use of non-flat optics such as gratings.
- The 0.3 Ásc long bunches of picosecond pulses (pulse separation ~ 10 nsc) are generated at 25 Hzc allowing easy synchronous detection in spectroscopic applications. The energy per pulse at 5 Ám is > 20 ÁJc.
- Bunch to bunch energy stability is guaranteed by pumping the OPO well above the oscillation threshold.
- A proprietary pumping design limits the degradation of the nonlinear crystal faces, an effect intrinsic to AgGaS2b. At a bunch repetition rate of 25 Hz, an operation time in excess of 15000 hours allows more than 15 104 J of energy at 5 Ám to be generated (8 hours a day, 5 days a week of continuous operation at 25 Hz during 12 months), before the crystal faces need repair.
The OPO is operated via a PC-based user-friendly interface allowing self-calibration and self-control of the laser performances. Frequency accuracy = 0.15 cm-1, resetability = 0.1 cm-1. The interface is equipped with gated integrators for synchronous detection of analog signals to allow immediate spectroscopic applications.
Please contact us for options such as extension of the tuneability range in the visible-UV, high energy single pulse operation in the infrared (100 ÁJ/pulse at 5 Ám), high power (>300 mW infrared power generation in the near infrared from 2.5 to 4 Ám), etc.
Thanks to close partnership with the laboratories a which have developed and operated the laser since 1996, LaserSpec can provide your team with the most reliable and convivial OPO system.
a The laser system
was initially developed in the research group headed by A. Tadjeddine at LURE (
b The OPO can be built around a cheaper LiNbO3 crystal at the cost of a limited tuneability range from 1.5 to 4 Ám.
c Please contact us for custom designed specifications
Selected publications of scientific works using this laser.
spectroscopy of the C60 and K-doped C60 on Ag(111) by sum-frequency
. Caudano, A. Peremans, P.A. Thiry, P. Dumas, and A. Tadjeddine,
áJournal of Physics B: Atomic and Molecular and Optical Physics 29, 1-9 (1996).
charge transfer at an Interface: K doping of C60/Ag(111)."
A. Peremans, Y. Caudano, P.A. Thiry, P. Dumas, W.Q. Zheng, A. Le Rille, and A. Tadjeddine,
Physical Review Letters 78 (15), 2999-3002 (1997).
spectroscopy of Au(hkl)-electrolyte interface by in situ visible-infrared difference
A. Le Rille, A. Tadjeddine, W. Q. Zheng, and A. Peremans,
Chemical Physics Letters, Chemical Physics Letters 271, 95-100 (1997).
mode and medium dependences of the infrared induced isomerization efficiency
for CH2 D-CH2 D isolated in rare gas matrices",
P. Roubin, S. Varin, P. Verlaque, S. Coussan, J.-M. Berset, J.-M. OrtÚga, A. Peremans, W.-Q. Zheng,
Journal of Chemical Physics 107, 7800-7808 (1997).
induced interconversion between five conformers of methanol dimers trapped in
S. Coussan, A. Loutellier, J.P. Perchard, S. Racine, A. Peremans, A. Tadjeddine, and W.Q. Zheng,
Journal of Chemical Physics 223, 279 (1997).
"Hydrogen-bonded bridges in complexes of
o-cyanophenol: Laser-induced fluorescence and IR/UV double-resonance
Broquier M, Lahmani F, Zehnacker-Rentien A, Brenner V, Millie P, and Peremans A,
Journal of Physical Chemistry A 105 (28), 6841-6850 (2001).
Potential dependent organization of water at
the electrified metal-liquid interface.
Schultz ZD, Shaw SK, Gewirth AA,
J Am Chem Soc. 2005 Nov 16;127(45):15916-22.
Infrared-visible sum frequency generation
investigation of Cu corrosion inhibition with benzotriazole.
úSchultz ZD, Biggin ME, White JO, Gewirth AA.
Anal Chem. 2004 Feb 1;76(3):604-9.
"Cu Corrosion Inhibition by Benzotriazole
Studied by Sum Frequency Generation,"
Z. D. Schultz, M. E. Biggin, J. O. White, A. A. Gewirth,
Anal. Chem., 76, 604-609 (2004).
of Ordered Multilayers from Polyoxometalates and Ag on Electrode
áJ. Kim, L. Lee, B. K. Niece, J. X. Wang, A. A. Gewirth,
J. Phys.Chem. B, 108, 7927-7933 (2004).