Parametric amplification

Shirakawa A, Sakane I and Kobayasi T 1998 Pulse-front-matched optical parametric amplification for sub-10 fs pulse generation tunable in the visible and near infrared Opt. Lett. 23 1292-4... 

Greenfield S R and Wasielewski M R 1995 Near-transform-limited visible and near-IR femtosecond pulses from optical parametric amplification using Type II p-barium borate Opt. Lett. 20 1394-6... 

Schematic diagrams of modem experimental apparatus used for IR pump-probe by Payer and co-workers [50] and for IR-Raman experiments by Dlott and co-workers [39] are shown in figure C3.5.3. Ultrafast mid-IR pulse generation by optical parametric amplification (OPA) [71] will not discussed here. Single-colour IR pump-probe or vibrational echo experiments have been perfonned with OP As or free-electron lasers. Free-electron lasers use...

Abstract Optical Parametric Oscillators provide a very efficient source of tunable coherent radiation. The principle of different kinds of OPOs are described. OPOs are used in astronomy for Laser Guide Star systems, and they may be used for other nonlinear optics applications in astrophysics, such as frequency conversion or parametric amplification. 

The complex amplitude of the signal field at the output of the crystal is amplified by a factor g with respect to the input field, g is always larger than one so that there is always coherent amplification of the signal field one speaks of parametric amplification. Nonlinear optics provides an amplification different from the amplification occurring in a medium which present population inversion. For a t)q)ical value of the nonlinear coefficient of 1 pm/V, a pump of... 

Quadratic NLO effects arising from (3 and x(2) include SHG, the electro-optic (EO, Pockels) effect and frequency mixing (parametric amplification). SHG is actually just a special case of a three-wave... 

Non-linear optical interactions occur in materials with high optical intensities and have been used to produce coherent light over a wide range of frequencies from the far infra-red to the ultra-violet. The three wave mixing process is of particular interest as it can be used for optical parametric amplification and optical second harmonic generation (SHG) and occurs in non-centrosymmetric materials. 

Other near-IR techniques that have been used to measure lifetimes, though not to the same extent as the aforementioned methods, include fluorescence up-conversion,(19 21) parametric amplification, 22 streak camera detection,(23) and two-photon excitation,1(24) The latter technique is particularly useful as it enables the greater penetration depth of near-IR radiation in organic matter to be used to obtain a well-defined region of excitation, e.g., in single cells or mammalian tissue. 

D. Hulin, A. Migus, A Antonetti.I. Ledoux.J. BadanandJ.Zyss, Parametric amplification sampling spectroscopy (PASS) Anew technique for resolving near-infrared luminescence on a subpicosecond time scale, Chem. Phys. 46, 75-77 (1986). 

Zeidler, D., Witte, T., Proch, D., and Motzkus, M. 2001b. Optical parametric amplification of a shaped white-light continuum. Opt. Lett. 26(23) 1921-23. 

Kim et al. [22] have used vibrational sum-frequency generation spectroscopy (SFG) to characterize the surfaces of (3-HMX single crystals, as well as the interface between HMX and the copolymer Estane. SFG is a nonlinear vibrational spectroscopic technique, related to optical parametric amplification that selectively probes vibrational transitions at surfaces and interfaces. Compared with bulk HMX, the surface vibrational features are blueshifted and observed splittings are larger. The technique may have application to detection of explosive residues on surfaces. 

A. Dubietis, G. Jonusauskas, A. Piskarskas, Powerful femtosecond pulse generation by chirped and stretched pulse parametric amplification in BBO crystal, Optics Communications 88, 437 (1992)... 

Yakovlev VV, Kohler B, Wilson KR. Broadly tunable 30-fs pulses produced by optical parametrical amplification. Opt Lett 1994 19 2000-2002. 

The most common technology used today to produce intense pulses at wavelengths other than 800 nm and its harmonics is optical parametric amplification (OPA) (72). In an OPA, a signal laser pulse at frequency ms propagates through a nonlinear crystal along with an intense pump pulse at... 

Petrov V, Noack F. Mid-infrared femtosecond optical parametric amplification in potassium niobate. Opt Lett 1996 19 1576-1578. 

Gragson DE, Alavi DS, Richmond GL. Tunable picosecond infrared laser system based on parametric amplification in KTP with a Ti sapphire amplifier. Opt Lett 1995 20 1991-1993. 

The unusual non-linear optical properties of polymer diacetylenes opened attractive prospects for their application in three or four-wave parametric amplifiers. Sauteret etal. reported that with a 1.06 pm, 1 GW/cm pump the gain for four-wave parametric amplification in the near infrared in PTS is about ten times larger than the gain for three-wave parametric amplification in LiNbOs. However, later work... 

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