A5056751151- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Photonic Crystal and Fiber Optics
- Laser-induced spectroscopy and plasma
- Photonic and Optical Devices
- Atomic and Molecular Physics
- Optical Network Technologies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Nonlinear Optical Materials Studies
- Spectroscopy and Quantum Chemical Studies
- Photonic Crystals and Applications
- Photochromic and Fluorescence Chemistry
- Spectroscopy and Laser Applications
- Mass Spectrometry Techniques and Applications
- Quantum optics and atomic interactions
- Laser Design and Applications
- Photoreceptor and optogenetics research
- Liquid Crystal Research Advancements
- Optical Coatings and Gratings
- Photorefractive and Nonlinear Optics
- Advanced Fluorescence Microscopy Techniques
- Molecular spectroscopy and chirality
- Chemical Synthesis and Characterization
- Optical and Acousto-Optic Technologies
- Advanced Optical Imaging Technologies
Murmansk State Technical University
2007
Ministry of Defence of the Russian Federation
2007
Lomonosov Moscow State University
1994-2003
Russian Academy of Sciences
1999
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
1998
International University in Moscow
1996
Enhancement of nonlinear optical interactions in the core a photonic-crystal fiber allows several χ(3) processes to be simultaneously observed field unamplified 30-fs pulses Cr:forsterite laser. Subnanojoule fundamental-radiation this laser experience spectral broadening arising from self-phase modulation and generate third harmonic at 410–420 nm. Third-harmonic also appear spectrally broadened output as result cross-phase-modulation effect. This catalog enhanced fibers opens way for using...
Supercontinuum emission is generated by the propagation of frequency-tunable femtosecond pulses 1.1–1.5-µm radiation an optical parametric amplifier through a photonic-crystal fiber. Nearly octave's spectral broadening was observed when laser with duration 80–100 fs and energy several nanojoules per pulse were coupled into fiber core radius 1.5–3 µm. The at 1.1–1.5 µm shown to be much more efficient than 800-nm Ti:sapphire radiation. role dispersion in supercontinuum generation discussed. In...
The influence of cross-phase modulation on third-harmonic generation is theoretically studied. Generalized phase-matching conditions for including pump-intensity-dependent phase shifts related to self- and effects are discussed. mismatch between the pump pulses shown vary from leading edge pulse its trailing edge, resulting in an asymmetric spectral broadening third harmonic.
Abstract The possibilities of using chirped pulses and broad beams for single‐shot measurements in coherent four‐wave mixing (FWM) are examined. idea such is based on the fact that define a linear transform, mapping difference between instantaneous frequencies pump to delay time these pulses. This can be then mapped onto spatial coordinate with use broad‐beam FWM geometry. We consider various modifications chirped‐pulse techniques, including degenerate non‐degenerate mixing, anti‐Stokes...
Supercontinuum generation in microstructure fibers with a core the form of cyclic polyatomic photonic molecule is studied. Air holes arranged two-dimensional holey structure cladding this fiber and larger hole at center cyclic-molecule-like structure, consisting an array small-diameter glass channels linked by narrow bridges, around central hole. This photonic-molecule microstructure-integrated bundle can guide light through total internal reflection, providing very high confinement degree...
We propose new schemes of high-resolution coherent four-photon spectroscopy where chirped pulses are employed for the Raman excitation a nonlinear medium. The use linearly in anti-Stokes scattering allows spectra susceptibility to be studied with terahertz resolution by measuring intensity signal emerging from four-wave mixing as function delay time between pump pulses. This approach can also single-pulse susceptibility.
In the context of designing a three-dimensional optical-memory device, we investigate cross section two-photon absorption photochromic material as function relative orientation polarization vectors light waves involved in data writing. It is demonstrated that, with an appropriate choice writing laser waves, one can considerably increase efficiency
A three-dimensional microscopy of an optical-breakdown plasma based on third-harmonic generation (THG) is experimentally implemented. THG shown to offer a universal method for inhomogeneities linear and nonlinear optical parameters various media. Due the nonlinear-optical character this process, allows transverse spatial resolution be considerably improved as compared with conventional methods microscopy. high along direction probing achieved due fact that prohibition in regime tight...
An experimental technique based on coherent one-dimensional hyper-Raman-resonant four-wave mixing in broad cylindrically focused light beams has been developed for line-by-line imaging of spatial distribution excited atoms a low-temperature plasma optical breakdown. The was applied to map lead laser-produced plasma.
We discuss applications of coherent four-wave mixing in the plasma optical breakdown produced by an additional laser pulse (laser-preproduced plasma) for generation short-wavelength radiation and investigation spatial distribution atoms ions. The use laser-produced on surface a metal target makes it possible to optimize efficiency frequency conversion implement diagnostics at various stages expansion. An experimental technique based hyper-Raman-resonant is developed two-dimensional mapping...
Abstract A planar periodically corrugated waveguide, consisting of a grating and mirror integrating hollow waveguide photonic band‐gap structure into single compact optical element, is shown to enhance coherent anti‐Stokes Raman scattering (CARS) in molecular nitrogen. Cross‐correlation measurements, intended visualize group‐delay effects the performed with picosecond Nd : YAG laser pulses, also measured dependence CARS efficiency on thickness layer, indicate that enhancement under these...
High-order harmonic generation in a hollow fiber filled with weakly ionizing gas is theoretically analyzed within the framework of slowly varying envelope approximation. The pressure that corresponds to maximum efficiency frequency conversion, absorption coefficient, phase mismatch owing dispersion, and enhancement harmonic-generation waveguide matching are estimated for 27th-harmonic fibers helium, neon, argon, krypton, or xenon. As result ionization-induced self-phase modulation pump pulse...