Journal ArticleDOI
Generation of high-peak-power tunable infrared femtosecond pulses in an organic crystal: application to time resolution of weak infrared signals
Isabelle Ledoux,J. Badan,Joseph Zyss,Arnold Migus,Daniele Hulin,Jean Etchepare,G. Grillon,Andre Antonetti +7 more
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TLDR
In this article, a parametric amplification and sampling spectroscopy method was used for temporal analysis of amplified and emitted infrared signals generated in an organic crystal, N-(4-nitrophenyl)-L-prolinol (NPP), which was revised in view of requirements linked to the observation of ultrafast subpicosecond nonlinear phenomena.Abstract:
High-intensity femtosecond pulses tunable in the 0.8–1.6-μm range have been generated by parametric amplification of a continuum white light in a new organic crystal, N-(4-nitrophenyl)-L-prolinol (NPP). The traditional concept of noncritical phase matching was revised in view of requirements linked to the observation of ultrafast subpicosecond nonlinear phenomena. The notions of θ (noncritical) and λ (noncritical) phase matching are introduced together with their applications. An experimental determination of phase-matching curves for both second-harmonic generation and three-wave mixing has been carried out. A θ noncritical phase-matching configuration for second-harmonic generation at 1.15 μm and a quasi-λ noncritical phase-matching configuration in the near IR for three-wave mixing were evidenced. Frequency and pump-intensity dependences of the gain have also been studied. Parametric emission at degeneracy was observed, with the emitted bandwidth extending from 1.0 to 1.4 μm. Time resolution of the amplified signal has been carried out by cross correlating the pump with the incoming signal, evidencing a reduced time broadening of the interacting pulses; a new spectroscopic method with subpicosecond time resolution is derived from the previous nonlinear optical characterization experiments by replacing the IR continuum from the water cell by any sample emitting in the same frequency range. This method, termed parametric amplification and sampling spectroscopy, was used for temporal analysis of amplified and emitted infrared signals generated in an NPP crystal.read more
Citations
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Journal ArticleDOI
Potassium titanyl phosphate: properties and new applications
TL;DR: Potassium titanyl phosphate (KTP) is a unique nonlinear-optical material that is being widely used for second-harmonic generation of Nd lasers emitting near 1 μm as discussed by the authors.
PatentDOI
Broadly tunable high repetition rate femtosecond optical parametric oscillator
TL;DR: In this paper, a tunable, singley-resonant optical parametric oscillator provides femtosecond light pulses in the infrared wavelength band, including an internally mounted thin crystal of KTiOPO 4 which is synchronously pumped by femto-cond pulses from a colliding-pulse passively mode-locked dye laser.
Journal ArticleDOI
Very large quadratic nonlinearities in solution of two push-pull polyene series: Effect of the conjugation length and of the end groups
TL;DR: In this paper, the quadratic hyperpolarisability of two series of push-pull polyenes of increasing length is measured, and it is shown that the sharp increase with the number of double bonds n is not exponential, the dependence being in n2.4 for one of the series.
Journal ArticleDOI
Growth and characterization of l-leucine l-leucinium picrate single crystal: A new nonlinear optical material
TL;DR: In this paper, single crystals of l -leucine l leucinium picrate (LLLLP) were grown by the slow evaporation solution technique and the crystal system and lattice parameters were confirmed by single crystal XRD.
Journal ArticleDOI
Quadratic nonlinear-optical properties of a new transparent and highly efficient organic–inorganic crystal: 2-amino-5-nitropyridinium-dihydrogen phosphate (2A5NPDP)
TL;DR: In this paper, 2-amino-5-nitro-pyridinium-dihydrogen phosphate (2A5NPDP) was designed to display high NLO efficiency by incorporating highly polarizable organic molecules arranged in a polar order between phosphate polyanion sheets.
References
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S. Kurtz,T. T. Perry +1 more
TL;DR: In this article, an experimental technique using powders is described which permits the rapid classification of materials according to the magnitude of nonlinear optical coefficients relative to a crystalline quartz standard and the existence or absence of phase matching direction(s) for second-harmonic generation.
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Book
Nonlinear optical properties of organic molecules and crystals
Daniel S. Chemla,Joseph Zyss +1 more
Journal ArticleDOI
Hyperpolarizabilities of the nitroanilines and their relations to the excited state dipole moment
J. L. Oudar,D. S. Chemla +1 more
TL;DR: In this paper, the second and third order hyperpolarizabilities of the three nitroaniline isomers and of two related molecules were measured and a theory relating this contribution to the first excited state of energy, oscillator strength, and dipole moment of the molecules was presented.
Journal ArticleDOI
Parametric Interaction of Focused Gaussian Light Beams
Gary D. Boyd,D. A. Kleinman +1 more
TL;DR: In this article, a theoretical study on the optimization of second harmonic generation (SHG) and parametric generation (PG) by a laser beam in a uniaxial nonlinear crystal is presented.